First Ride: 2024 RockShox SID Ultimate Fork

Jul 25, 2023 at 23:29
by Mike Kazimer  

Somehow it's already been three years since the SID last received a refresh, which means that RockShox's venerable cross-country fork has once again been revised to keep it relevant for today's XC riders and racers.

Updates include new 3-position and 2-position dampers, a new Debonair+ air spring for the standard SID, and longer upper tubes to increase bushing overlap. The standard SID comes stock with 120mm of travel, which can be reduced down to 110mm, and the even lighter weight SID SL is available with either 110 or 100mm of travel.

One thing's for sure – there's no shortage of models in the new SID lineup. The fact that each model is available with either a 3- or 2-position damper means there's a total of 16 different options. At the top level, the SID Ultimate is priced at $999 USD, and the SID SL Ultimate is $899.

SID Ultimate Details

• Intended use: XC
• Travel: 110, 120mm (tested)
• Wheel size: 29"
• Stanchions: 35mm
• Debonair+ air spring
• Charger Race Day 2 damper (3 and 2-position options)
• Offset: 44mm
• Claimed weight: 1480 grams
• MSRP: $999 USD
• More info:


The new crown on the SID and SL has had any excess material machined away to save weight.
Every SID model is available with either a two position or three position damper.

SID Details

The overall look of the SID hasn't changed dramatically, but the SID Ultimate and SID SL both have a new crown shape where any excess material has been machined away to shave some precious grams. The 120mm SID Ultimate weighs in at a claimed 1480 grams, 57 grams lighter than the previous model.

The SID SL, the lightest option in the lineup thanks in part to its 32mm stanchion diameter and different lower leg profile, sees its travel bumped up to 110mm (there's still a 100mm air spring available), a change that increases its weight by 26 grams compared to the last generation; it now weighs 1352 grams.


Internal updates to the standard SID include a new air spring that has 50% more negative and 16% more positive air volume. The resulting spring curve is intended to give the fork a slightly softer feel off the top for better small bump compliance, and more support in the mid-stroke to keep it riding in the sweet spot. The SID now uses a small coil top out spring, another measure that's meant to help improve the beginning stroke suppleness.

The new three position damper option adds in a middle 'Pedal' setting that sits between Open and Lock. As you'd expect, Pedal adds more low-speed compression damping for smoother sections of trail where more support is helpful, but where a full lockout could feel harsh or diminish traction.


SRAM's updated TwistLoc remote can be used to twist between the three settings, or the fork is available with a small lever on the top cap that's used to pick the desired position. There's also a new SIDLuxe rear shock with three matching compression settings that can be controlled at the same time as the fork with the TwistLoc remote.

It's no secret that a number of the previous SID forks were plagued by bushing play, an issue we encountered on several test bikes. To address that, RockShox increased the upper tube length by 25 millimeters. That extra length means that the lower bushing is fully engaged at top out, and there's 50% more bushing surface engagement, hopefully greatly reducing the likelihood that any annoying fork play will develop. So far the revision seems to be working – my test fork is still working properly after a 7 day stage race and a handful of other rides.

The new Debonair+ air spring has more negative and positive air volume, and a coil top out spring.
Longer stanchion tubes and the resulting increased bushing overlap should hopefully mean the SID's premature bushing play is a thing of the past.

Photo: Dave Silver

Ride Impressions

The arrival of my SID Ultimate test fork and SIDLuxe shock lined up with the start of the BC Bike Race, a 7-day cross-country stage race, so I mounted the new bits to an Orbea Oiz, went on one shakedown / setup ride, and then dove into a week of racing on Vancouver Island.

There was one feature missing from my BCBR setup – the TwistLoc shifter that's used to switch between the three settings on the fork and shock. That's right, I completed the entire race with my suspension fully open. That's borderline sacriligeous for those who worship at the alter of efficiency, but for me it was one less thing to think about, and since the Oiz's rear suspension is already fairly firm off the top I didn't miss having a lockout at all.

Don't worry, though, the lockout has since been installed, and I can confirm that there's a noticeable difference between the three settings. The middle 'Pedal' setting is very usable – it comes in handy on climbs that have enough rough bits that a full lockout would be too much, but where firming up the suspension helps make the bike feel that much more efficient. It did take some time to remember the direction that the twist shifter needed to be turned to open up the suspension versus locking it out, but that's something that eventually becomes second nature.

Before I go too much further, I should state that I'm not a diehard XC racer, even though I do love going fast on little bikes, and I recognize that the wants / needs of an elite XC athlete may be different than mine. That said, my ideal cross-country bike would have a fork without any cables running to it, and there would be a simple handlebar mounted remote to actuate the lockout or pedal platform on the shock. The TwistLoc shifter works fine, I'd just prefer pushing a lever or button.

Given RockShox's propensity for adding electronics to everything, I'm a little surprised there's no low-profile electronic lockout in their lineup. Yes, Flight Attendant exists, but what about a wireless lockout with a tiny button on the handlebar to activate it? That sure seems like it'd be handy for a wide range of riders, and not just the XC crowd, and you could probably make a ½ or ¼ size battery that would provide plenty of juice for a couple ride while also saving some weight.

Suspension Feel

The vast majority of modern XC bikes are much better than the sketchy, spindly things that used to be the norm not that long ago. It turns out that a touch more travel and geometry that's a little less pointy goes a long way towards making a bike that's enjoyable on the climbs and the descents (within reason, of course – there's still limits to what you can get away with on a 120mm fork).

Compared to the previous version, the new SID is noticeably softer for the first few millimeters of travel. Now, I didn't really have any major complaints about the previous SID (as long as it didn't have bushing play, of course), but that softer beginning stroke does help out with hand comfort on long, chattery sections. After that, it ramps up nicely, and over the course of a week of blind racing I only had a few hard bottom outs, all in situations where using full travel was completely warranted. I've since bumped up the pressure slightly and added a volume spacer (I'm now at 80 psi with one spacer for my 160 lb weight), which helps make sure that the end of the stroke is there in reserve for the biggest, and usually unexpected, hits.

As far as adjustments go, well, there really isn't that much to discuss. The rebound is adjusted via a 2.5mm allen key that can also be removed to adjust the rebound on the SIDLuxe, and there was enough range for me to find a comfortable setting.

For the low speed compression, I do think it'd be nice to have the option to further fine tune the fork – for comparison, the FIT4 damper that Fox uses in their StepCast 34 allows gives riders 22 clicks of low speed compression adjustment in the open setting. Adding that feature to the SID would likely add a little extra weight, but the result would still be much lighter than a Pike, and would be a great option for speedy downcountry machine.

Overall, the updates to the SID have increased its capability and comfort - it's more than up to the task of handling World Cup cross-country racing, and it can be pushed even further without flinching.

Author Info:
mikekazimer avatar

Member since Feb 1, 2009
1,696 articles

  • 90 1
 I'd be willing to pick one of these up for my Spur if they've definitely sorted the reliability issues. The original SID Ultimate is a decent fork until the bushings inevitably self-destruct and then in my experience you're in for a good few months of waiting for replacement lowers, which SRAM service centers never have in stock. Why they designed the fork so that the $2 bushings can't be replaced and you need a new $300 set of lowers to fix the problem is beyond me, but I'm not an engineer / accountant so what do I know?
  • 9 0
 Seconding this.
  • 7 0
 It's interesting that the cause of the issue was incomplete overlap on the lower bushing at top out. Was this a situation where the PMs pushed for more travel on a chassis designed for less? Or is this something the engineers actually thought would work?
  • 28 2
 I really tried to like the SID suspension on my Spur, but both the SID Ultimate and SIDLuxe were garbage as far as quality/reliability goes. The fork always had bushing play out of the box or developed it within the first 50 hours, so replacing lowers was literally part of the 50 hour service interval. SRAM would warranty it, but won't deal with customers directly, so I had to go through a shop each time and pay them $35 to ship the lowers to SRAM (after first going to the shop with the complete bike to show them that the fork had bushing play). SRAM also wouldn't pay for the shop to remove/install lowers, so I had to do that myself along with using my own oil & crush washers. So each warranty meant 3 trips to the bike shop, $35, a lowers service, and anywhere from 2 weeks to 2 months without a fork.

As for the shock, that thing leaked so much air can fluid that it would go completely dry within 20 hours of riding, so I was having to add air can fluid every week or two. SRAM was initially warrantying them for that issue, but by the time I got mine and tried to warranty it, they had started calling it "normal", and refused to warranty it.

The performance wasn't bad when things were working properly, but switching to a 34 Grip2 and DPS made it apparent just how much better things could be.
  • 6 7
 Pretty sure it was only the early ones, especially ones that came on bikes that had this issue.
  • 12 12
 SID is/was garbage, both in reliability and damping quality.
  • 6 1
 @DaneL: Yup, RS called my bushing play and leaking shock normal. I'll be staying away from RS after this and other issues such as the Trek thru-shaft garbage I had on my Slash, which they wouldn't replace with a different shock even after several failures.
  • 9 0
 @DaneL: Why were you just sending the lowers to Sram? Send the entire fork and they perform the labour FOC. Sounds like you overcomplicated matters for no good reason. The Sram service center here in Canada has been nothing short of great in my experience.
  • 3 2
 @rich-2000: I think so too... have about 150 hours on mine right now, best and smoothest fork since 2011 Marzo Bomber 888
  • 2 0
 @notthatfast: Things may have changed, but at the time they said they didn't have the bandwidth to do the replacement themselves, so they only wanted the lowers shipped to them.
  • 3 0
 @DaneL: Interesting, maybe they do things differently there but that doesn't sound like good service to me. I had lowers AND CSU on a Pike replaced not long ago and I paid zilcho and they did all the work, I just shipped the complete fork.
  • 3 0
 @DaneL: Sounds like the shop should have just sent the whole fork in. I would take that up with them.
  • 5 2
 Never had bushing wear issues or play on both of my SID Ultimates, FWIW.
  • 11 13
 A company come out with a product, and it’s pretty well agreed on, that it’s shit.

Said company comes out with the new product, and their main selling point is that it’s less shitty than the last one, and you are considering buying one?

Get a 34 SC and ride it for years.

Problem solved.
  • 4 0
 Why on earth have they not given us the option for the blue colour on the Boxxer
  • 1 0
 @DaneL: I can understand the GRIP2 fork, but if a DPS shows how much better things can be, wait until you try a real shock. It'll shock you.
  • 1 0
 @Mac1987: This is on a lightweight 120mm bike without any weirdness in the suspension design. I wasn't looking to put a coil or external reservoir shock on it, so that left me with few options. I also wanted to be able to get it rebuilt on short notice when I'm traveling, so that pretty much left me with a Fox DPS or RS Deluxe. I've had issues with literally every RS suspension product I've owned (as well as pretty bad warranty support), so... Fox DPS it was! I can't say I was expecting much more than mediocrity, but with the correct tune it feels pretty damn good. Plus, I'm right in the middle of the range of adjustability for compression, rebound, pressure, & volume spacers, which never happens. I've even ridden quite a few 2-3k ft descents that are relatively chunky, and it surprisingly hasn't overheated (riding at a pace where I absolutely cook 200mm F / 180mm R rotors).

Having come from the SIDLuxe definitely lowered my standards a ton, though. Its options for compression damping were 0 or full lockout, so it sucked for climbing, and even with 28% sag and the max number of volume spacers, I'd bottom it out hard multiple times a ride. It never overheated on me, but I'm pretty sure that's just because the damper was only doing work on the rebound stroke.

There are plenty of shocks out there that will perform better than a DPS (especially on longer travel bikes and on longer, rougher descents), but there's something really satisfying about having a shock that does just enough while being compact, light, reliable, & cheap (I paid $275 new for the DPS factory).
  • 1 0
 @DaneL: I'm sure there must be bikes where the DPS just works, because some people seem to love them. My own bike came with a DPS Evol Performance as stock, specifically tuned for the bike. With varying air pressure, number of tokens, and damping settings, I could achieve some level of mediocre compliance or some control and bottom out resistance, but never both. It also lost compliance and control on lift assisted runs (probably by overheating), though not as fast as the X-Fusion O2 on my old bike. After a while, I had enough and ordered a Manitou McLeod for €180, going by the great experiences I had with both the Minute Pro on my XC bike and the Mattoc Pro that already replaced the Fox 34 Performance (GRIP) on the same bike. After setting the air pressure by feeling on the parking lot, I already had both more compliance and bottom out resistance than the DPS. It also handled square edge bumps FAR better. I liked the DPS better than the Float CTD, but that's as much praise as I can give it.
  • 2 0
 @DaneL: I did 10k of DH the first day I had my Spur. Front and rear issues you describe after 20 hours was me after 2 rides down Mt Ashland. The puddle under the rear shock was always there, taunting me. I swapped it out after 1 month and sever rebuilds.
  • 38 0
 Everyone wants a red Zeb, but this take on Sid blue is really nice.
  • 7 0
 I agree. It's like they made it a little darker, and a little softer to look at. Looks great imo.
  • 16 0
 They're both glorious, Rockshox really bringing their A-game to the colors of this generation. Except for meadow green I guess, I'm alone with my love for that one.
  • 18 1
 We The People want a red Lyrik again
  • 4 0
 I want a red SID as well
  • 3 0
 There have been a few floating around Whistler this week... Who knows if us mortals will ever ride them though
  • 14 1
 Zeb's red baby, Zeb's red.
  • 3 7
flag Grady-Harris (Jul 27, 2023 at 10:18) (Below Threshold)
 @danielfloyd: the green is the best fork color besides white, you are not alone
  • 30 7
 Who cares about bushing play as long as spare parts are available? Oh yeah, right. There are non. Your expensive rock shox fork is a throw away item once they are worn and you are out of warranty.
  • 6 34
flag racecase (Jul 27, 2023 at 7:55) (Below Threshold)
 This fork makes XC bikes more fun. Who said anything about not getting parts? Some ppl just complain about anything- I think it looks great, keep raising the bar RS!
  • 18 0
 For real? The lower bushings are non-replaceable on the outgoing SID? In this day and age of sustainability and reparability that seems like a glaring omission on Sram's part
  • 7 0
 @racecase: I had two failures on the SID before I said f' it and bought a pike.
  • 2 12
flag racecase (Jul 27, 2023 at 8:32) (Below Threshold)
 Yeh, I get all that, but this new SID, and philosophy is that you won't need to replace it.
  • 16 0
 @racecase: Bushings are a wear/sacrificial part. Making them non-replaceable on expensive cast lowers is just dumb
  • 1 0
 @racecase: this fork is hardly more serviceable than the previous. The sealhead is now replaceable, but it’s essentially a charger 2 damper now, which had their fair share of unresolvable issues. That’s about it. I’m also concerned about the lack of an upper backup ring on the new piston, especially when Rockshox is charging nearly $500 USD for the new generation CSU’s. I would take a 34 SC over this any day of the week, although I do prefer the new charger 3 lyriks/zebs to the 36/38
  • 5 0
 Me:Bushing: a usually removable cylindrical lining for an opening (as of a mechanical part) used to limit the size of the opening, resist abrasion, or serve as a guide.
RS:keyword "usually"
Me: fck, you win
  • 1 0
 @stephenthesquirrel: just like a derailleur pad you mean? O wait...
  • 1 0
 @Mac1987: WTF is a derailleur pad?!
  • 1 0
 @stephenthesquirrel: a pad that mounts the derailleur to the frame, and takes the hit when crashing into the derailleur.
  • 1 0
 @Mac1987: Ok. I still don't understand your point though?
  • 1 0
 @stephenthesquirrel: You wrote "Bushings are a wear/sacrificial part. Making them non-replaceable on expensive cast lowers is just dumb"
Derailleur pads used to be sacrificial parts as well, but are getting replaced by direct mount derailleurs. This is just as stupid.
  • 21 0
 I guess there's some value in the name recognition of "Sid" but a 35 mm stanchion fork at 120 mm and a 32 mm fork that is 100-110mm travel seem like they're actually different forks.
  • 12 0
 Names don't mean anything to brands anymore. Look at the "Mustang" Mach-E. Look at many bike brands giving the lowest trim of a hardtail model a different frame with different geometry. Same name, literally different bike. SRAM would argue that there are two names in play here: "SID" & "SID SL", but they know they're just abusing the name recognition, as you said. JRA podcast still sometimes calls the SID 35 the "Pike World Cup", which makes so much more sense.
  • 7 0
 @justinfoil: I think that marketing angle makes much more sense. In my mind Pike is a more natural association with the downcountry ethos than Sid. @Rockshox - you are welcome to use "downcountry ethos" in your marketing materials when the time comes.
  • 5 2
 @justinfoil: Theres a possibility you just dont understand why things are named the way they are.

Remember Astons Cygnet? This was just a rebadged Toyota, and was an Aston so that Aston could skirt some regulatory emission issues, the Mach-E is no different, just a way to skirt some regulatory issues, so they can continue to make the Mustangs that they really want to.

As far as the naming convention, its to categorize the forks so they can be easily packaged. The Sid forks are designed as their XC forks, SL for the racers, the Sid for everyone else, that really seems like a straight forward idea doesnt it....
  • 5 1
 @onawalk: This is not like automotive badge-engineering. Which is also stupid... and holy crap you picked an insanely obscure model. Could have gone so many, including the whole Holden/Chevy thing in Australia. Let's try one: Ford Mondeo = Ford Fusion in North America only, and it was also called the Ford Taurus, but only in some markets because they previously killed the Taurus in the US. Then they brought back the name, but not the same actual car, to the US when the Freestyle model failed to sell. And for hot minute in the middle it was the Five Hundred... And that's not even getting into the Mercury (sub-brand of Ford) rebadges or both Mondeo/Fusion and Taurus. So dumb.

But what I'm talking about is slightly different. Same name worldwide, all markets. But literally different products.

Back in the day you went to buy a RockShox XC fork, and you said "I want a SID", and you got a SID, maybe paid a little more for extra knobs. Now you say "I want a SID" and it's: "The 35mm or the SL? You racing? Oh wait, some racers are using the 35mm one because they hammer. Do you hammer? Do you want to pay more to get Select, Select Plus, or Ultimate stickers? What do those mean? Well, you still have to look at the letters after the name, because there are a few options for each."

They could have named the Mach-E anything, just having it in the line-up skews the MPG ratings for their whole line-up. It could have been named Taurus X Mach-E and still got the same results as far as the regulators are concerned. You might be thinking of something like how the PT Cruiser had a unique floor so when the seats were removed or folded it had enough flat space to be considered a "light truck", and since it didn't weight much or have a truck motor, it brought up the emissions ratings for the truck line-up as a whole. But that had to do with the configuration, not the name.

Names are meaningless to these big corporations, they'll muddle their own legacy to prey on our collective nostalgia for profit without blinking.
  • 1 0
 @justinfoil: I think you've missed my point here. I'm not talking about badge engineering, I was speaking to your point about why the Mustang Mach-E is named as such...

Aston Martin had the Cygnet to skirt regulations, not for any other reason, thats why there is a Mustang Mach-E. So in response to your point that (names dont mean anything to corporations) they actually mean a lot. Without the Cygnet being an Aston Martin, they were producing a range of cars that didnt meet the regulatory requirements for emissions. So the name means everything, as does the Mach-E. Willing to bet that the Mustang brand will become its own stand alone brand in the future, thats why the Mach-E is a mustang, just like the Cygnet....

So, the name SID, means a lot, it lets the consumer know what the intended use case for the fork is. There have been Sid SL's in the past, Hell "back in the day" there was the XC, SL and HD (the elusive dual crown model)
The names mean everything, and RS's naming convention here makes a tonne of sense really. You've got the 35mm chassis for what most XC oriented and DC bikes are going to use, and the SL version for the real racy ones. Then you pick your flavour of trim level (Select, Select+, Ultimate) and you're off to the races (but hopefully on the SL version....)
  • 2 0
 @onawalk: The Cygnet analogy still doesn't work. I agree it was only done for emissions, but there is no regulatory reason for either SID to have that name. It's not like you couldn't run a Pike in an XCO race if you wanted to. RS doesn't need to sell X number of XC forks to avoid fines; and even if they did, they didn't borrow someone else's design wholesale and slap a name on it. They made two fairly different platforms and stuck the same name on them.

Again, it's very different than automotive badge-engineering, whether it was done for regulatory reasons or local market reasons. It's two different products from the same company with the same name. It's silly. I know they're kinda bad at names (they tossed the great Totem name for unknown reasons, but borrowed a real historical person's name, twice, to come up with new names), but surely they could do it again.
  • 2 1
 @justinfoil: Jesus wept…..
  • 19 5
 RS: "Oh, it's been an entire three whole years, time to fix all the corners we cut on the last big revision."

World: "How about some fine adjustments available externally?"

RS: "Nah, you don't need that. We think you're all idiots and will just f*ck it up."
  • 4 0
 Well, they're not completely wrong. I am a certified idiot when it comes to suspension setup
  • 17 6
 SID is garbage and RockShox is a garbage company for telling me my bushing play and leaking shock was "normal".
  • 2 0
  • 11 1
 It kind of blows my mind that the prior Sid upper tubes didn't fully contact the lower bushings at full extension.
  • 2 0
 That's why I ran mine at 110mm to get more overlap and never had a bushing problem. As to the damper, that's why I switched to a Pike and was willing to take the 300 gran hit.
  • 6 1
 Csnt wait to replace my SID with the new R7 or the Mattoc. My SID select plus developed major bushing play after 200 kms. Unacceptably!
  • 4 0
 Here's hoping this sorts the issues. I had 3 weeks on my SID before the bushing play got so bad the front wheel vibrated violently under braking. Currently 3 months and waiting on the warranty replacement...
  • 4 1
 My impression is that RS possibly spent the majority of the development time on the last model SID SL and race day damper, and did a rush job on the 35mm fork, which probably sold a ton more and gave them a bunch of bad publicity!

The race day damper, which while imperfect does give very decent performance for its weight, and the SL chassis is also decent. I have had no reliability problems with the SL fork or Luxe shock.

Certainly the non replaceable bushings was a spectacular own goal, that can’t have been a measured performance decision, it surely must have been a business decision?

So the new models, no buttercups? Seems like the perfect application? Maybe made the fork too soft for racers?

Gripshift? No thanks, nope. Twisting and pushing or holding the dropper lever? That’s not a pretty thought!

Flight attendant, save us. Only questions are how much will it weigh and wince for the price… Hurry up already!
  • 2 0
 I'm curious about the importance of soft spring rate at top out. Looking at it in isolation means at top out the fork would be very supple.
However, aren't all these fork run stiff LSC for pedaling performance and fast cornering stability?
Then even if the spring is soft, the damper still making it harsh anyway?
  • 1 0
 Just here to add to the pile... the SID Ultimate that came on my Hei Hei CR DL prevented me from riding the bike for like the first two months with bushing issues. Swapped to a Pike and haven't looked back. Feel bad for the poor soul who bought the twice warrantied SID on Ebay.
  • 1 0
 Is the three-position lockout push to lock, or push to unlock?

Interesting that you did not mention it in this review, because the Orbea OIZ has a proprietary Fox shock that cannot be changed (even by fox themselves) from its push to unlock configuration.

Because of the i-line remote shock lockout mounting and design, you cant get any other remote lockout shock on the bike that will fit.

That means that using the SquidLock on the Orbea to actuate both the shock and fork at the same time is NOT a possibility with RS forks. Basically forcing you to use an old model Fox fork that is push to unlock...

This, of course, is a bummer.
  • 4 0
 What handlebar is that mike?
  • 1 9
flag TheBearDen (Jul 27, 2023 at 7:47) (Below Threshold)
 I think it's a ProTaper
  • 6 0
 @plustiresaintdead, a Burgtec Wide Ride Enduro.
  • 2 2
 Why call it a top-out spring, doesn't this just help with a more supple top-stroke like in the EXT Era? The absence of buttercups is noticeable, seems like the spring is doing its job? There was a decision here to forgo buttercups, which can't be too costly weight wise. Kinda curious.
  • 3 0
 Zeb and Boxxer piston copied from Vorsprung, coil topout copied from EverFlow.
  • 2 0
 Do you happen know if the new damper and/or air spring are compatible with the previous generation sid? It seems like it could be a nice upgrade option.
  • 2 0
 damper yes, airsping no
  • 2 0
 So... no Flight Attendant yet? I thought they will release the new SID together with the Flight Attendant version, now that Nino is no longer the only one riding with it.
  • 3 0
 In a few months, after everyone has bought SID Ultimate, they release the electronic version.
  • 2 0
 @Fat4242: I don’t care about Flight Attendant, electronic lockout would be awesome. I don’t care for wireless anything on my bike, but to me wireless fork/shock lockout makes good sense.
  • 2 0
 Nice top out spring not like fox dropped that 8 years ago because it wasn't as reliable as a pneumatic negative top out.
  • 1 0
 Switching to self-equalizing air springs was not about reliability (a coil spring is more consistent and smooth feeling than a self-equalizing air spring with transfer port that can get clogged with grease), it's about adjustability. A coil negative will give a different feel depending on the positive spring pressure, and top-out height will also be effected: higher positive pressure means the negative spring is compressed more, giving a higher top-out height as well as a stiffer off-the-top feel. Self-equalizing air springs act and feel pretty much the the same off the top no matter the pressure.

I this this air spring still has a transfer port, the coil is just used to give a smoother feel off the top. RockShox puts a similar spring in their air shocks, instead of making the air spring better (well matched pos & neg volumes, slippery seals, good bushing clearance, etc).
  • 3 0
 Rockshox can you please make a long bolt on fender?
  • 1 0
 Mr Kazimer, it is nice to see you looking like a "regular" mountain biker with shorts, short sleeves, and bare knees and elbows!
  • 3 2
 Did the SID like the Boxxer have problems with cracking? Seeing as it’s only coming out now.
  • 3 3
 RS website says 35mm for all stanchions. And 180mm minimum rotor. And no mention of 100mm options. Might be a wrong website update.
  • 1 1
 Yeah, it looks like Rockshox changed to the 35mm for SID Ultimate while the SL version is still using 32mm. Surprising since this leaves the Reba and other XC oriented Rockshox forks at 32mm stanchions. Think this is still kind of stupid for Rockshox to do this. Why not just call this a reduced Revelation instead?
  • 1 0
 @CSharp: 180mm rotor minimum? That seems hard to believe for XC forks.
  • 1 0
 @shorttravelmag: It's a bit confusing with this fork as it's supposed to be the top XC end for Rockshox. Yet, they're crossing into more than XC racing with this and more into the lower range of the enduro spectrum. Hence, this is why I say this is somewhat like a Revelation. The Rockshox Revelation did go from 32mm stanchions to 35mm to follow the Pike back in 2017 (maybe 2016). 35mm stanchions and bigger rotors add weight - not what the XC racers in spandex want.
  • 1 0
 @shorttravelmag: It's 180mm on the SID and 160mm on the SID SL, which makes sense.
  • 1 0
 The SID has 35mm stanchions with 180mm minimum rotor and 110mm or 120mm travel. The SID SL has 32mm stanchions with 160mm minimum rotor and 100mm or 110mm travel.
  • 2 4
 Will see a few of these in the lineup at the Whistler bike park because people don't want to spend the money and rent a bike and their XC bike is "just fine". And the complain when it breaks or doesn't work very well afterwards.
  • 3 0
 No buttercups?
  • 6 3
 No Kashima?
  • 2 0
 Prove me wrong but the old ones are lighter.
  • 1 0
 Older ones are lighter , yes
  • 2 0
 Sick! That spring curve
  • 3 4
 am i crazy for thinking the axes should be swapped?
  • 6 0
 @twonsarelli: yes. This is the standard way for these graphs to be shown, and even if it weren't, the displacement is the independent variable, so should definitely be on the x axis, with spring force on the y axis
  • 2 0
 @twonsarelli: You could swap them, but it would tell you something different. In this case, travel is indeed the independent variable we care about. It’s useful to know how the spring force increases throughout the travel. A rider isn’t intuitively aware of how much force they’re putting into the fork, but they do generally have a sense of how far through the travel they are. The graph highlights how the spring force is higher through the mid stroke on the newer model which means you shouldn’t blow through your travel as quickly, which is a key characteristic on shorter travel forks. Additional, the lower force at the start of the stroke means greater small bump sensitivity.
  • 2 0
 @twonsarelli: Spring curves are normally plotted this way, with the logic being "at x point in the travel, the spring produces y force". The inverse statement and plot is totally reasonable, but this way seems to be the convention. Suspension leverage curves are also plotted similarly with displacement on the x axis.
  • 1 0
 @KeeganPelton: got it. thanks for the explanation

@sdurant12 thanks. i misinterpreted what the spring force was referring to. make sense now. thank you!
  • 2 0
 @emarquar: totally. i was thinking they were trying to explain how much force it takes to get to a specific point in the travel. gotta read more carefully i guess!
  • 2 1
 @twonsarelli: yes. what you are changing (independent variable) goes on the X-axis while what you are measuring (dependant variable) goes on the Y-axis.
  • 4 0
 @poah: no questioning that part. just misunderstood what they were trying to explain with it. all good now, thanks
  • 2 0
  • 1 0
 Do the people want 2p or 3p? Remote or no remote? Asking for a friend.
  • 8 0
 3-pos: lock-out is only for paved/smooth-gravel climbs. Remote only if you're racing to put food on your plate.
  • 5 2
 My preference is 2-position with no complete lock-out (like a lot of piggyback shocks have). I don't race XC or try to set PRs on the roads to the trailhead, though.

The old SidLuxe was 2-position but with a complete lock-out, which was pretty useless IMO.
  • 3 0
 Amateur XC racers want 3p with remote.
  • 2 0
 3 position remote Smile
  • 1 0
 @HCnoodle: Professional XC racers use 3p with remote.
  • 1 0
 Whats a great 27.5 fork for 26er bikes?
  • 3 0
 Any, just pay attention to the axle to crown length (and axle specs if you want to run your original front wheel).
  • 1 2
 Actually laughable that RockShox are basically using the same 35mm stanchions on an xc fork that they have only just upgraded from on their DH fork
  • 2 0
 The wall thickness on the SID is thinner.
  • 3 2
 When is the embargo on the new fox forks up?
  • 2 2
 Just make a 130mm SID already.
  • 1 0
 Just get a manitou
  • 4 6
 They fixed the busing play by installing longer upper tubes instead of better bushings? Seems a bit backwards to me
  • 3 0
 Rockshox must be kicking themselves right now for not just installing the "better bushings" instead of the "mediocre bushings" they thought would be perfect for the new SID.
  • 4 0
 The problem was the absence of bushing overlap, not the quality of the bushings.
  • 3 6
 Shimano brakes with a SID fork? HOW DARE YOU!
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