RockShox Is Hinting at Something. An Inverted Fork Design? A Cyclocross Specific Fork?

RockShox Is Hinting at Something. An Inverted Fork Design? A Cyclocross Specific Fork?

Let the speculation begin. There have been quite a few rumors swirling regarding new products coming out of RockShox, but this is the first physical evidence we’ve seen. By the looks of it, it could be a lot of things – a new rigid fork, cyclocross, etc. But those fork blades look like they are spaced quite wide, with a lot of tire clearance. Could this be a new fat bike fork? It certainly doesn’t look like the original RockShox RS-1 that was introduced by Paul Turner, Steve Simons in 1989. According to RockShox, “Everything Changes” soon…

Updated – Check out more of the RS-1 after the break!


It looks like this is the modern incarnation of the RS-1. An inverted suspension fork with round stanchions instead of the leaf spring concept like the Lauf – will it be for regular mountain bikes or Fat bikes? Maybe there will be versions for both. Stay tuned.


  1. Purely speculating, but if we go back to 1989 we are talking about Paul Turner and the original RS1. Turners most recent work has been with inverted forks for Maverick and X-Fusion. So maybe this is an inverted carbon fat bike suspension fork??? On the flip side of wild speculation its just a carbon rigid fat tire fork and Rock Shox/SRAM is just trying to over-hype what is a very boring product.

  2. Hmm… although another quality carbon MTB fork on the market would be nice, it’s certainly not worth this kind of hype. What’s that little square thing on the right side of the fork crown (opposite the side with the cable guide)? Elastomer insert perhaps?

  3. Greeng, those are usually found on Tri bikes, they’re little bumpers to prevent the fork from striking the frame really hard causing cosmetic damage.

  4. Either an ultra light full carbon inverted cross-country racing fork or SRAM’s version of Lauf’s fork. Please, anything but a fatbike fork!

  5. Looks to me like a new light carbon XC fork (with big, but not fat clearance.)
    Works for 26, 27.5, or 29er with different travel limiters, maybe 120,110, and 100mm travel, respectively?
    And I would guess the rubber on the top left crown is a cover for some internal fastener, since there is no other obvious way to keep the sliders from falling out.

  6. Looks like all the offset is in the crown = large rotating mass when turning the fork.
    It also likes like the inner legs may be oval, which would improve torsional rigidity.

  7. Looks like an inverted carbon suspension fork. That plastic nub in the stanchion could be for internal cable routing for remote lockout. Clearance aside, this looks pretty cool!

  8. the little rubber plug on the crown? where the x-loc hose goes in. it is an xc racing fork, after all…
    is it gonna be 15mm or 20 at the axle? lots of xc specific wheelsets only go to 15 at the hub, but RS has always been a 20mm advocate

  9. Well…I certainly didn’t see this coming! And especially not from Rockshox from all people! Needless to say, I’m excited to see what this upsidey-downsidey fork brings!

    And now speculation:

    From the middle and bottom photos it appears to have ovalized “aerodynamic” uppers, but round stanchions, likely just carbon structure laid over the round inner section, but it could possibly mean the inside parts of the stanchions are keyed or shaped. I also spy a black coating on the slider surface.

  10. Oh wow, what’s up with that? Smokestack is right that Marzocchi has an inverted fork on the market. Is the hype more about attracting people to RS instead of announcing something new?
    BTW, the square plug is where the whim wam goes so the fork keeps you going diddly for all day fun. Don’t know. I think the earlier post about a small bumper used on Tri bikes is right.

  11. I believe it is a longer travel fork. The third picture looks like it is the start of “Roam” the enduro label for other sram components and the face book pic does not look like a fat bike or a 29er.

  12. I love it when my exposed inner stanchions are down by the dropouts where they get absolutely zero dirt and impact exposure.

  13. IMO – It won’t be an XC fork, it be will be aimed at the same customer as the X-Fusion Revel. And will have very similar spec. Probably lower weight though.
    *satisFACTORYrider – Don’t want to disapoint you but this as the e-word written all over. XC is to specific for such a high end product. The carbon uppers will give the weight and stiffness to meet anybody’s need that ride from trail to AM. It will probably have a 20mm axle which is not very popular in the xc world, but it’s needed for an inverted fork. The oval sections will have very limited effects on aerodynamic but will limit the fore/aft flex
    The square trap is probably a door to access the cartridge either for adjustments or to separate the cartridge from the uppers… we will know shortly!! Happy trails!

  14. Single piece steerer/crown/upper legs of carbon fiber would allow this thing to be pretty light. Throw in a revised 15mm Maxle (20 mm perhaps with minimal weight penalty) and thread the remote lockout through the plug and you could probably knock a pound off of the existing blackbox-level xc forks…and add $1k to the price. XC weight weenies would field test acceptability and warranty/breakage replacements before moving beyond 100mm of travel (remember the mid 90’s when 100mm was the standard for DH travel)

  15. a friend of mine was at the taiwan show.

    it’s an inverted XC racer fork. One level above the SID. It has it’s own axle spacing and diameter too.

    It’s not an enduro fork. It’s not a fat bike fork. But there is one coming. And it’s not inverted.

  16. Advances made in key way design from seat posts have finally made the prone-to-torsional flex USD forks a reality??? I hope so cause they promise less “stiction” and lower un-sprung weight. Will need some type of rock guards but that’s ok cause they will look sweet.

  17. What ever it is, it was shown at the recent press camp for 7spd XO, so plenty of people out there know about it.

    Incidentally what happened to the 650b spec enduro post ?

  18. Fanboy it’s almost right, but it’s inverted!!

    XC Ultralight fork, not fat, not roubaix, just light!

    I want to see more!!

  19. @k11 that was a DH fork.

    FYI Lefty’s have amazing torsional stiffness and are light to boot. Try it before you knock it.

  20. @K11- except that the Lefty is far stiffer torsionally and fore-aft than other forks, contains needle bearings instead of bushings, and is about 3/4 of a pound lighter than standard forks.

    Hopefully this thing will get a 20mm or bigger TA, 15mm is pathetic even on a non-inverted fork.

  21. @andrew. i get that it was a dh fork. but how does shrinking it down to a different category mtb fork make the information collected non-relevant? (i have ridden a lefty on a trip, still not a fan)

    the folks that ride and/or like lefty forks would be the types that would have the most interest.

What do you think?