Two-Minute Review

OneUp's Axle F Thru-Axle

Words AJ Barlas
Photos AJ Barlas
Date Jan 21, 2019

OneUp Components developed their Axle F* after team riders, including Richie Rude and Remi Gauvin, mentioned needing improved fork durability. OneUp staff had also experienced issues with broken or bent axles and knew there was room for improvement.

*Wondering what Axle F is? "Axel F" is the name of 1984's Beverly Hills Cop theme song (Note - this clip contains violence scenes and some nudity)


  • Claimed 98% stiffer than stock 15mm axles
  • 20g lighter than stock axles
  • Low profile hex head avoids catching on obstacles
  • Boost and non-boost options for Fox and Rockshox forks
  • Red and Black (Rockshox) / Orange and Black (Fox)
  • MSRP: 30 USD / 39 CAD


OneUp makes boost and non-boost versions of the Axle F for both Fox and RockShox forks with 15mm axles. The Fox boost option was tested. 

If you’ve read my musings on QR axles then you already know I prefer the bolted option. Multi-tools are everywhere and should be readily available for a well-prepared rider. The Fox Kabolt has served me well for twelve months; it’s light and has remained secure during that time. A downside to the Kabolt is how gentle I’ve had to be when securing the axle—the material around the hex key is soft and began to round early on. It’s still functional but the focus on making it really light—it was originally developed for the lighter bike duties of Geoff Kabush—has affected some aspects of durability.

Fox Kabolt comparison. Note Torque Spec.

The Fox Kabolt specifies a torque of 17nm to secure the front wheel. This possibly contributed to the hex-key no longer being snug when tightening but isn't the sole reason. 


OneUp recommends 10nm to secure the front axle. They claim that "17nm is excessive" and may cause problems removing trailside with a multi-tool. RockShox also recommends a 10nm torque value. 

On the other hand, OneUp was seeking something durable and strong and they've developed the Axle F for the rigours of the Enduro World Series. It shouldn’t be a surprise that this weighs more than the Fox Kabolt, nor that this axle, specifically the hex key insert, has taken the wear and tear like a champ. For an additional 33 grams it has a sturdier feel during installation, and I haven't been gentle with the tools.


  • Axle F: 61g
  • Kabolt: 34.5g
  • RS Maxle: 37g


  • Axle F: 30 USD
  • Maxle: 37.99 USD
  • Kabolt: 45 USD

The Axle F features a recess through the middle, saving some weight. Full diameter is only required where the axle meets bearings.  

Riding the Axle F back to back with the Kabolt, it’s hard to say if there is a notable difference. I’d like to say it feels better but it’s more likely placebo. However, bent or busted 15mm QR axles from heavy bottom-outs or crashes aren’t unheard of. Having an axle with more meat holding the front wheel is something that I’ll happily pay the small weight penalty for.

If you are fine with 15mm QR axles or you need to remove your front wheel to transport your bike to the trails, this isn't likely for you. If you'd like an axle with more rigidity and you are okay using a tool for installation, the OneUp Axle F is an excellent option. The Axle F is another functional part from OneUp that saves riders money and that's something everyone can get behind.

Click here for more on the OneUp Axle F

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-4 dan_l Heathen Greg Bly Cam McRae Chad K IslandLife JVP Velocipedestrian natbrown Beau Miller Darryl Chereshkoff Marshall-Willanholly
MaWa  - Jan. 21, 2019, 12:25 a.m.

I think Sram is going to release a new axle standard. The 20.02mm axle diameter axle will be called BUB. 

Unfortunately you have to buy SRAM Hubs as well, because the old (bad) 20.00mm Hubs are way to small and not durable enough for Down-Country usage.

(never had any problems with 15mm Axles. But I think that Fox 36 for 29" could be a bit stiffer.)


+8 Velocipedestrian natbrown Beau Miller pedalhound Darryl Chereshkoff Cam McRae Marshall-Willanholly Tjaard Breeuwer
IslandLife  - Jan. 21, 2019, 11:40 a.m.

Pinkbike is leaking...


MaWa  - Jan. 21, 2019, 12:25 a.m.

This comment has been removed.

+1 IslandLife
luisgutierod  - Jan. 21, 2019, 2:43 a.m.

you left MRP out.


Peter Horne  - Jan. 21, 2019, 7:10 a.m.


+1 Heathen
Timer  - Jan. 21, 2019, 4:27 a.m.

Just bring back the bolt-on Hexlock.


+5 IslandLife grambo Velocipedestrian Sandy James Oates Beau Miller Tjaard Breeuwer Absolut-M
AJ Barlas  - Jan. 21, 2019, 6:39 a.m.

20mm as well please. 🙂


+4 AJ Barlas IslandLife TheFunkyMonkey Beau Miller
Vik Banerjee  - Jan. 21, 2019, 6:14 a.m.

When I ordered by MRP Ribbon I asked for a bolt on axle and they provided one with the fork. Nice not having to buying another axle and upgrade after the fact.


+2 IslandLife Beau Miller
AJ Barlas  - Jan. 21, 2019, 6:40 a.m.

That’s a great option. I wasn’t aware MRP are doing this. Great to hear.


+1 Beau Miller
IslandLife  - Jan. 21, 2019, 11:42 a.m.

I did the same... nice to have the option.


+1 Beau Miller
Timer  - Jan. 21, 2019, 2:45 p.m.

I think this might be the default axle for the MRP Ribbon. I got mine directly from the MRP distributor without specifying anything about the axle and it came with the bolt-through version.


+1 Tjaard Breeuwer
mtnallen  - Jan. 24, 2019, 8:30 a.m.

Sarah here from MRP. You can specify which axle you'd like on our Ribbon forks- QR or bolt-on. With our new Raven and Ribbon SL forks, they come with bolt-on standard.


+10 Mammal Chad K rvoi IslandLife Pete Roggeman Velocipedestrian Sandy James Oates natbrown Beau Miller Darryl Chereshkoff Mike McArthur Tjaard Breeuwer thaaad Absolut-M
Kelownakona  - Jan. 21, 2019, 6:16 a.m.

@MaWa let's not turn this into Pinkbike.


+1 Beau Miller
grambo  - Jan. 21, 2019, 12:09 p.m.

Want this and a bolt through rear 12x148 DT Swiss style axle for my trail bike... Never had the fork come loose but it's unnecessary to have the QR style. I have actually had the rear work its way loose before which is scary.


+1 Beau Miller
AndrewR  - Jan. 21, 2019, 12:43 p.m.

As One Up Don't make them I use Wolftooth hex rear axles (or Carbon-Ti if I am feeling crazy - they used to be one of the only after market options).


+1 Beau Miller
Timer  - Jan. 21, 2019, 2:48 p.m.

MRP also make bolt-through rear axles for a variety of dropouts.


luisgutierod  - Jan. 21, 2019, 3:43 p.m.

Yeah, I got one for my tracer and dumped the stupid OEM bolt in my useless parts bin...


0 Aaron Croft Niels TheFunkyMonkey Absolut-M
Brumos73  - Jan. 21, 2019, 12:23 p.m.

I'll take a QR any day/all day over using a tool to remove an axle. PIA to use a tiny multitool to try and remove an overtorqued axle trailside.


+2 AJ Barlas Greg Bly
IslandLife  - Jan. 21, 2019, 4:20 p.m.

When racing I prefer to not have that giant QR piece hanging out there to potentially get snagged on something.  I've had instances where, during off-trail excursions, I have to pull sticks and shit out from between it and the fork = lost time.  Switched to a bolt and eliminated that issue.  Also I prefer the bolt through's lower profile for similar reasons along with the aesthetics.

It's also not worth the time to change a flat (QR or not) during a stage, I just ride it out and then have lots of time to fix my flat at the end of the stage.  Have never had a problem using a multi-tool to take off my wheel... I just don't over torque them.


Andy Eunson  - Jan. 21, 2019, 2:46 p.m.

Never had issues with a Maxle or Fox through axle QR. But I have had my DT Swiss rear through axle wind on axle come loose more than once. Don’t know if the lever hits something and comes loose or what. I also doubt that a bolt on would be any different but if I ever needed a new one that’s what I would get.


+2 AJ Barlas Cam McRae
Brad_xyz  - Jan. 22, 2019, 10:46 a.m.

As I big (or at least heavy) guy, this OneUp axle was a significant upgrade from the stock Fox QR on my Fox 36. 

When I first went from a Rockshox Lyrik using Hope torque caps on my Hope front hub to the Fox 36 with the stock QR axle (and no torque cap interface) I quickly noticed a lack of torsional rigidity on the Fox set up compared to what I was use to.  The Rockshox torque caps make a big difference this way IMHO.  The One up axle helped significantly, although I still think the torque cap setup was even more torsionally rigid.


Greg Bly  - Jan. 23, 2019, 6:39 a.m.

When are we going to see CF crowns and lowers? 

We all want a four pound 180 mm travel trail fork 

With a 20 mm axle please.

First comment is rich but then I like PB sarcasm it's fun!


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