Otso Waheela S gravel bike is suspension corrected for Fox AX Fork – or not

The launch of the Fox AX gravel fork opened up a world of possibilities when it comes to suspension equipped gravel bikes. The only problem? With an axle to crown measurement of 420mm, adding it to most gravel bikes would result in the raising of the front end, skewing the geometry. The answer of course is to create a suspension corrected gravel frame – though that’s not the best answer if you also may want to run a rigid fork at some point as well. To offer the solution to both of those scenarios, Otso Cycles has come up with an all new bike called the Waheela.

Borrowing a bit from their Warakin frame design, the Waheela starts off with a slightly different material. Using Reynolds 520 steel tubing with an ED coating on the inside of the tubes for rust protection, Otso can offer the ride qualities of steel while keeping the price a few hundred dollars less than the stainless steel of the Warakin.

At the back end of the bike, Otso has employed their Tuning Chip Dropout system which allows for three different rear wheel positions with chain stay lengths from 420-440mm. The dropout is angled up, so that as you push the axle back to allow for bigger tires, it also slightly drops the bottom bracket to maintain the geometry. This is the same system that Otso uses on their Voytek fat bike, and after years of abuse now, our test sample is still going strong and completely quiet.

Thanks to the Tuning chip Dropouts and the shaping of the stays, the Waheela can comfortably run tires from 700c x 28mm to massive 700c x 53mm or 29 x 2.1″. It can also roll 650b x 53mm for plenty of options.

Of course, the biggest news here is that the Waheela is suspension corrected to use with the Fox AX gravel suspension fork (or MRP Baxter). That means it’s equipped to run 420mm axle to crown forks, which are quite a bit longer than the standard 390-400mm rigid fork measurement. The solution? As part of their recent headset development, Otso created a special lower headset cup that has a 20mm spacer integrated into the cup. It’s all one piece, and it installs in the head tube just like a normal head set cup.

The 20mm spacer allows the frame to run standard rigid forks without affecting the geometry. And other than the additional black section below the head tube, the frame still looks fairly normal while running a rigid.

Equipped with a threaded bottom bracket, thru axles at both ends, the ability to run internal 27.2mm dropper posts, and three bottle mounts plus fender and rack mounts, the frame has a claimed weight of 2200g. Available as a frame for $899, complete bikes will start at $1,999 for the Comp build with a rigid fork or $2,349 for the Expert build also with a rigid fork. The $3,249 Pro Build will include the Fox AX suspension fork. Check out the Otso site for more details.


Notify of

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Newest Most Voted
Inline Feedbacks
View all comments
Kyle Woodman
4 years ago

Cool idea. Head tube spacers have also been around a while.. I have a 20mm spacer pressed into the bottom of my 98 Rocky Mountain Blizzard head tube which lets me run a rigid carbon cross fork.. 🙂 Good times.

4 years ago

Oh man, our Roadbikes are evolving (“again” and/or “back”) into Mountain Bikes. ^^
But still a good idea. Hopefully it won’t be a new source for creaking noises or instability issues.

Brendan Moore
4 years ago
Reply to  TI NO

@TI NO, no creaking issues with the extended cup. There is lots of headtube engagement and we have been testing these for a long time=)

Andrew Black
4 years ago
Reply to  TI NO

So true. Otso just invented . . . A hardtail MTB?!

4 years ago

this looked cool right up to that part where it says reynolds yada yada lead tubing. With as much flex as that rust bucket will have why even add the suspension fork.

Brendan Moore
4 years ago

Hey Andrew Black and TI NO,
The axle to crown on the “average” 29″ mountain bikes fork and bike (100mm of travel) is ~470mm. That is 50mm taller than the 420mm this bike is designed around for gravel suspension forks. Note that gravel suspension forks are still loosely defined, but will fall in that 30-60mm travel range.
The Geometry is built around a drop bar too, which is a lot different that a mountain bike.

The headset is solid with no creaking after a lot of long dirty miles.

Feel free to reach out with other questions!