X-Fusion's Revel HLR inverted fork created quite a splash when it first appeared
two years ago, a gold anodized, limited edition, and very expensive option for riders in search of something that stood out from the norm. It turns out those first forks were part of a trial run, X-Fusion's way of testing the waters to determine the viability of the design before committing to entering mass production.
The Revel X is the culmination of the lessons learned from that first generation Revel, with new internals, a refined keyway system, and perhaps best of all, a much lower price. It also comes in a less flashy color, but if you had your heart set on a golden fork don't despair – they will still be available in limited quantities.
Details
• Intended use: trail / enduro
• Air sprung
• Roughcut damper
• 34mm aluminum stanchions
• Adjustable high and low speed compression, rebound
• Travel: 27.5" - up to 160mm. 29" - up to 140mm.
• Weight (claimed): 4.5 pounds (2041 grams)
• Colors: black, gold (limited edition)
• Price: $1000 USD
• Available late January 2016
ConstructionTo limit the amount of torsional flex (one of the potential drawbacks to an inverted design) X-Fusion uses two keyways in each leg, a concept similar to what's used in dropper posts to keep them from twisting. X-Fusion claims that the Revel is one of, if not
the stiffest forks on the market, but we'll reserve judgement until we're able to get one out on the trails. A 20mm thru-axle joins the lower legs for even more stiffness over a 15mm axle. The Revel uses a tapered steerer tube, and a different crown is used depending on what wheelsize the fork is for: 29ers get 51mm of offset, and the 27.5” option has 46mm of offset. Claimed weight is 4.5 pounds (2041 grams).
DampingThe Revel X relies on X-Fusion's new
Roughcut damper, a sealed cartridge system that uses an expanding bladder to handle the oil that's displaced when the fork is compressed. High and low speed compression are independently adjustable via two dials at the top of the fork, and the rebound knob is located on the bottom of the same leg.
The left leg of the Revel X houses the air spring, with a Schrader valve on the top of the leg to adjust the air pressure. In a departure from the original Revel, there's no longer a second valve on the bottom of the leg to alter the fork's bottom-out resistance. Riders that need more bottom-resistance can add oil to reduce the volume of the air chamber, which isn't quite as simple of a system when compared to the plastic spacers both RockShox and FOX use to accomplish the same result, but it should still be a relatively easy procedure.
When the Revel becomes available in late January 2016 it will retail for $1000 USD, with up to 160mm of travel for 27.5” bikes, and up to 140mm for 29” wheeled bikes.
MENTIONS:
@x-fusion-shox
Why have I not ever seen a real review on the Metric? Or the previous USD Gold fork? It seems like they almost avoid press. Why?
I've had a Dorado on my DH bikes for the past 4 years, as well as 4 other of my close riding friends. In SoCal we may not get any rain, but there isn't a single DH trail we ride that isn't full of rocks. And due to that lack of rain, all the bushes and brush are hard, and abrasive.
None of us has ever had a single scratch on our stanchions, and the stanchion guards only need to be replaced when the bolt mounting holes crack from being removed and remounted too many times (and maybe over tightened a little).
Since your head is obviously stuck in the sand, I'll try to break this next bit of news to you gently.....we now know definitively that the earth is in fact round, and not flat! Amazing!
I have something to cheer you up, though. Click the first picture and press the right arrow key three times. Enjoy!
That's just insanely pretty.
@homerjm
I smashed a hole in a pair of domains which if I'm not mistaken have the same lowers as boxers.
I'm liking mine, i know they have made some low end stuff for OEM on bikes like GT, but their top line stuff is really good.
I have also not experienced the creaking, primarily because I have not owned a Fox fork in a while, but a couple of friends as well as some local mechanics were warning me that it is a known issue for Fox. Fox has beefed up their warranty to extend coverage to 2 years on creaking crowns, but I have been told that even Fox has not claimed to have totally fixed the issue. Crowns will creak on plenty of forks if you beat on them for a couple seasons, but supposedly the issue can be exaggerated on Fox products. Again, not something I have experienced, but just something I have been told to look out for by industry folks that I trust.
Now about this new Roughcut damper. I just hope the "expanding" parts inside are at least as reliable as the old HLR damper...
@bkm303 as you said Leftys runs on needle bearings, not exactly a keyway system. it's really different.
anyway, I'm looking forward for the first reviews
enduro-mtb.com/testbericht-die-edle-x-fusion-revel-hlr-im-kurztest
Seem to be pretty stoked. If they really made some succesful improvements, it is gonna Be a blast.
But before that i' ll try My mattoc with the new IRT: -)
For a discussion about forks, cartridges and damping rods, check this link out:
www.revzilla.com/common-tread/why-things-are-inverted-forks
Although these are motorcycle forks, the same lingo and characteristics apply...also found the discussion of cartridges helpful (using shims/washers on a rod versus a larger washer outfitted with various-sized orifices on a rod), as well as open vs sealed cartirdges...
I'd be into testing out the Revel just to see if the handling would be that much different...
"So, unsprung weight, is this an issue on MTB forks? In our opinion, very little. The total weight of bicycle forks nowadays is so light that unsprung weight is negligible between inverted and standard. We highly focus on fore aft stiffness and overall weight to strength, which an inverted design blows away the conventional fork design. Bushing overlap and oil bath come as pluses to the inverted design as well."
Mg VS AL, Mg is really light
And @bkm303 is right, wheel, tire, brakes are far heavier than that.
At least they dropped the price significantly. Originally they were asking folks to coin up 1775 USD. I'm thinking there weren't enough people like us that were willing to spend that much so they waited until they could bring the cost down (grateful for that).
www.bikerumor.com/2013/09/11/eb13-germana-invents-teardrop-shaped-stanchions-for-inverted-crown-suspension-forks
I can't even type it without laughing.
Thank you Mr Kazimer.
140mm is a bit lame for us who ride step trails full of rock gardens and roots..
forums.mtbr.com/all-mountain/2016-revel-x-995895.html
'Dropper post style' rotation cannot happen when the stanchion is paired with another one so the Keyways are not restraining any twist or adding stiffness in conjunction with the axle.
Think of a Lefty. They need rotational restraint which they get from a faceted stanchion (same affect as a Keyway with regards to rotation). If you paired two Lefty's you wouldn't need the faceting and could revert to the normal circular ones without adding or removing any stiffness.
It's not a great analogy but it demonstrates my thinking.
@Kiwiplague - I didn't realize this. They showed a close up of the stanchions with a caption about the keyway, which would lead me to believe you could see what they were talking about in the picture (that's usually how that works). I guess in this case they might as well have posted a picture of a kitten with that caption.
If you do neither of these things (use a standard 20mm axle with no keyway) the stanchions still have a degree of freedom where they can displace angularly from one another, like a pair of tongs. Instead of rigidly connecting the whole assembly, the 20mm Axle is allowed to act like a hinge under torsional force. This force, along with the flex of the upper and stanchion materials, must also cause the stanchions to rotate inside the lowers. Without the keyway to resist this, you've left a degree of freedom open for the assembly to flex.
TL;DR: you either need a keyway or a RS-style proprietary axle. Everyone hates the proprietary axle, so they used a keyway.