Air vs. coil shocks. It's a well-worn debate, especially when it comes to downhill bikes, although coil shocks continue to be the more popular choice on the World Cup circuit. But what about on trail bikes? If your bike had suspension kinematics that worked well with a coil shock would you run one? Or are you satisfied with the performance delivered by a modern air shock?
There are a few reasons why the vast majority of full suspension trail bikes (I'm using that term in the generic sense, to refer to anything that's not a DH bike) come with air shocks. The most obvious is the ease of setup – air shocks don't require shops to keep a selection of springs in stock; all that's needed is a shock pump and you can get set exactly the right amount of sag. It's also relatively simple to add volume spacers in order to adjust the amount of end stroke ramp up, something that's not possible with a coil shock. There's more trial and error when setting up a coil sprung shock, and in some cases riders may find themselves forced to choose between a setup that's a little too firm or a little too soft due to being in between spring weights.
Speaking of weight, that's another reason why air shocks are so prevalent. Installing a coil sprung shock typically incurs a .5 pound weight penalty vs. air. That's not an astronomical amount, but it's certainly something to keep in mind.
If air shocks are easier to set up, and weigh less, what are the benefits of a coil shock? Well, traction is the biggest one. Modern air shocks have excellent small bump sensitivity, but it's still really hard to beat the supple, ground-hugging feel of a coil. That extra grip is particularly useful in wet or loose conditions, situations where you want your rear wheel firmly planted on the ground. They also tend to maintain a more consistent feel on long, rough downhill runs, although that difference has diminished a bit as air shock technology has progressed. On the flip side, coil shocks tend to have less a less 'poppy' feel to them compared to air, due to their more linear spring rate. If you're the type of rider that tends to boost off of every little bonus feature you can find a coil shock might not deliver the ride characteristics you're looking for.
The extra-plush, supple feeling delivered by a coil shock is one of the reasons we've been seeing them appear on more and more shorter travel machines. There's also the fact that there are more shorter stroke options than ever; for a time it was difficult to find coil shocks that would fit anything other than a freeride or DH bike. And don't forget about that climb switch, the little lever found on shocks from all the major brands that can be used to firm things up for the uphill, and then opened up when it's time to go down. It's small detail, but it's another reason why coil shocks have become more appealing in recent years.
What do you think? Given the choice, would you pick a coil or air shock?
This was needed 5 years ago when air shocks sucked. The Fox Float X2 and the RockShox SuperDeluxe are absolutely perfect for nearly every rider in nearly every situation.
Second, absolutely love your shop, and I’ve got the stickers to prove it. I try to visit every time the couple times a year we’re out from NYC to see my wife’s fam (she’s from Van, folks in macKenzie heights, sis and her fam few blocks from you guys in N Van). Keep up the great work, good to see some real shops still doing good work. See you around Christmas if there is time to swing through before heading up for Whistmas (the original one, not the bike park opening!)
I have a 2018 Range with a Cane Creek DB coil CS and it's awesome. Much better than the stock RS superdeluxe. This bike is progressive enough for a coil.
Also, I think you need to be careful not to discount the bike itself. I had a Nomad that I just couldn't find the right air shock setup with - Multiple shocks. As soon as I swapped to coil, it was perfect.
I rode a 2017 Giant reign for a year with an air shock, never really loved the ride and struggled with the suspension setup. Then I put on the DX2 coil and the bike came alive. The fork got a smoother feeling as the pressure was eased on it from the shock being more supple and not ramping up so quickly. And the traction on the rear was night and day different. Personally I found the coil to be more playful than the air because the bike as a whole responded much better.
Like most things, I don't think there is a black and white answer it's more of a 'it depends', on a lot of factors but namely suspension design and rider's preference or experience. But as a consumer it's great to have both options because I definitely wouldn't call the Giant Reign + Fox float X2 absolutely perfect.
I got a 2010 monarch rt3 for dirt cheap on eBay and then sent it to Dirtlabs for a custom tune. $300 got me a worlds better shock for my bike.
The Macleod is a nice shock and manitou took care of it when I had the original IFP issues. I plan to get a mattoc when/if I get to the 27.5 conversion. So tools of the trade and all that.
Also the argument about being in between spring rates is moot in my opinion. The good springs are available in 25lb increments which would be pretty indistinguishable in isolation because all bikes these days have kinematics that keep them pretty much at the sag point through a range of weights. I have used my Nomad with a 425lbs spring at weights between 70 and 85kg (I was on a diet, then I got in the gym and wore a 3litre pack) and the spring is still going fine. I'm not a pro, but I have found the sag to be almost the same across that 15kg weight difference, and the damping can also be tuned massively to adjust for bottoming, sensitivity, etc.
My point is, for a normal bloke like me, coil is just better. You don't have to service it and you don't have to change springs if you get in the right ballpark from the outset. It gives better grip and consistent feel. What's not to like?
Given a suitable path of leverage ratio on a frame, coil will a) work better and b) for a longer time until service is needed.
If you don't ride as much, go for an air shock. So that's probably a good amount of people. Serious riding, and a lot of it, it's coil all the way.
I have used a Monarch Plus and a £20 second hand 10 year old Fox Van on a 2014 Giant Trance. The coil outperformed the Monarch in regards to grip so much it was laughable.
I have also tried that same coil on a Ibis Mojo HD3. In comparison to the X2, the difference less noticeable than the Monarch , but the suppleness and removal of buzz was still better on the coil. However, the lack of ramp up on the linear linkage of that frame meant it bottomed out too easily, so the air worked better in that sense.
In both cases, it was very easy to tell the difference between the coil and the air. With a high end coil I would expect the difference to be even more pronounced.
With the coil I can get it to move using just one finger pushing on the saddle, needs more force on the X2.
I'm reasonably light at 65kg/140lbs so maybe that makes a difference.
The best set-ups I've run are where the bike achieves a bit of sag under its own weight. Requires a negative air chamber of some sort I think, but I'm no suspension expert!
Other folks have mentioned in earlier comments, rider weight matters - If you're running really high or really low pressures your air shock is probably not at it's best, and a well working coil that is a bit too linear for the frame might still be an improvement. I'm a very average weight and my FX2 works great.
Better off with a new spring for 30€ without f*cking up your suspension.
I still bought a Push 11-6 because then I surely know that it is set up right for years to come
- set and forget set up (simplicity)
- it is buttery smooth (performance)
- my frame does not support air due to progressivity (I really like the frame)
- durability
Oh, and I've ridden plenty of long descents in Switzerland & Austria: @Boardlife69 is right, air shocks heat up there too.
As far as shocks are concerned, I could leave it on lockout and not know the difference until halfway through the run when my ankles protest, or a big G-out corner. As long as the front wheel is fine the back will follow. Plus I like a lot of compression and fast rebound. My hands dont get tired until at least the 5th or 6th run. I got this home exercise to keep my hands in shape and able to hold on for a really long time. Works great and its fun.
my current bike (radon swoop 170) is almost exactly linear, so a coil shock would not work well at all
if i got a bike progressive enough to warrant a coil i'd definitely want to try it, and then if it worked, would make the switch
Unless your frames doing something weird like going super regressive coils always going to be better.
Why Push doesnt sell a 11-6 for frames they tested? Because it just didnt work well even with a fully custom tune.
Enduro frames not capable for coil shocks usually blow trough travel and even big air shocks need Volume spacers... Thats a big fail imo
Whether or not anyone else agrees is a different story entirely. Even tuners disagree among themselves. If you have a firm understanding on monotube shock valving options then you understand that almost anything is possible to tune for, but it takes expertise and skill to setup and dial in. It’s not just stiffer/softer or faster/slower; it’s the rate of change relative to velocity and the shape of the plotted curve. Which requires internal changes to achieve before turning the external knobs provide the desired effects. The comment about only MTB using air shocks in the suspension world has some validity.
Maybe this will help
poppy = underdamped rebound
.
Myself? Hey this one looks dry and rough maybe I'll slow my rebound by 2 clicks... Well I can do that with a coil as well
I haven't tried a coil shock on a modern enduro bike, so I'm not sure how much of that liveliness comes from the air shock.
Coil shock and air fork for the all mountain / enduro bike
Coil shock and fork on the DH bike
The more abuse, the more likely I am to run a coil. I'm 200lbs and getting more aggressive every year. Next upgrade will be either a coil fork or a conversion for the 36 I have now.
The frames with a linear progressive curve are flirting between the lines. Santa Cruz nomad 4 is one of them. Personally I hated the stock super deluxe air on that bike. I switch to a cane creek dB coil with a 600 lb spring. It changed it for the better. Tracked the ground very well and it felt more playful.
But I have also owned a Santa Cruz Bronson v2 with an air shock. And a giant glory advanced with a coil. In my experience and based on the leverage ratio. The giant bike should never be spec with a coil shock. The leverage ratio on that those maestro suspension systems say after the mid strock it becomes a regressive curve. And you definitely feel it after taking a big drop.
I say if the kinematics is hyper progressive. It needs a coil shock. Linear progressive, rider choice. Linear to sin curve, air shock.
For sure a coil is less playful, they got that right in the intro, I’d probably look at coil for enduro and DH where weight and playfulness are not applicable.
Short travel, lightweight trail slayers, who wants a coil, that defeats the point of those bikes.
The current crop of air shocks are excellent.
Started with a coil on my Transition 2017 Patrol and now just set up my Sentinel with a Push 11-6 coil shock.
www.pinkbike.com/photo/16531480
Agreed!!
For trail bikes it more depends on riding style and local trails
Heaps of other bikes have flip chips
Forgot too mention also want it too be a vpp e-stay e-bike, as well?
Coil in the summer for plush n crush mode at the bike park.
Airs ease of adjustment and volume spacers mean you can achieve a better setup which ultimately is much more important than if it’s coil or air, especially as new air shocks feel so good.
Secondly i wasn't saying coil doesn't perform brilliantly (i have bikes with both FYI) i was saying if performance is close enough that we have to debate it then other factors like adjustability come into play and therefore in my opinion being able to adjust air more can result in being able to better tune and improve the performance, and i believe correct setup will make much more difference to performance than just if it's coil or air.
I have used air shocks where i agree with you that they don't perform anywhere near a coil but i have also used ones like a float x2 (lots of DH racers wouldn't use these if they didn't perform) and cane creek shocks that perform just as well as coil, if not better when set up well, again though this is my opinion.
progressive-> coil shock to use full travel.
if its the 222x66 you can run a 222x70 and put a limiting spacer on the shaft
In fact, if you don't like fiddling, coil shocks are the way to go.