The Chub Fixed is made up of two oversized aluminum flanges bonded to a massive carbon shell. It rolls on sealed cartridge bearings and employs an alloy 15mm thru axle bolted to the frame by custom Titanium M10 bolts.

As compared to a typical high flange fixed gear hub using the same spoke count, rim, and build method, the Chub Fixed decreases peak spoke stress under pedaling loads by a staggering 70 percent! Reducing peak spoke stress means your wheels wind up less, accelerate faster, and won’t blow up.

Intended Use: Road, Track, and paved road racing and training.

Flange Material EXA+ Aluminum
flange drilling 24 or 32
shell material EXA+ flanges bonded to carbon fiber shell
Axle Width 120 or 130mm
axle standard n/a
axle material EXA+ Aluminum
Bolts titanium m10
disc standard n/a
Gear Threading 1.375 x 24 tpi
colors silver, blackout
weight 296 g

Chub Hub FAQ

How tight should I tighten the M10 titanium bolts to keep my wheel in the dropouts?

You need to follow our torque specification of 40Nm. If you still have trouble keeping your wheel in the frame, do not overtighten the bolts. Take your bike into your local shop so they can help diagnose your problem. You should use a torque wrench to ensure your bolts are tightened to spec.

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Do I need to use anti-seize compound on the M10 titanium bolt threads?

Yes. If you fail to use anti-seize, commonly called Ti-Prep™, you risk the bolts seizing in the axle. Repair will be a time consuming and expensive endeavor.

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Why is this hub so big?

In short, bigger flanges build better wheels. The large flanges provide more leverage on the spokes, which means up to 70% less spoke stress.

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I need replacement bearings for my Chub. What bearings do I need to buy?

Check the hub service instructions in the tech info tab. It lists bearing sizes for all Chub hubs as well as the proper install procedure.

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Why is the Road Front so small compared to the huge Chub Fixed Rear?

On a bike with either rim brakes or no brakes, the front wheel does not undergo the punishment the rear wheel sees from pedaling loads. In this case, we opted to save weight since we did not need the large flange diameter to decrease spoke stress. We did, however, make the flanges as far apart as possible to increase spoke triangulation which results in a laterally stiffer wheel.

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Can I use a Quick Release with the Chub Road Front?

Yes, you can remove the M6 clamping screws and use a standard front 9mm quick release.

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Why is the disc side flange larger than the non-disc side flange on the Front Disc Chub?

Force transmitted from the disc brake system to the hub causes significant wear and tear on your disc side spokes. A larger flange has more leverage on the spoke. This means less spoke stress for a given amount of torque (ie, force input from disc brake system). We went with a smaller non-disc side flange to save weight and material.

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What is the freewheel thread spec on the Chub SS/DJ?

1.375″ x 24TPI. The other thread-on standard (30mm x 1mm) is not compatible.

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I have a Chub thru axle hub and need to get different endcaps, what do you offer?

In the past we have offered two different version of Chub thru axle hubs. While the hubs are similar, they use different flange, bearing, and axle sizes. The flange diameter is the easiest way to tell which hub you have if you don’t know, it is marked on the center tube of all hubs along with the other wheel building dimensions.

If your hub has 59mm flanges, we offer QR or 15mm endcaps. We do not offer 20mm endcaps for the 59mm flange hub.

If your hub has 73mm flanges, we offer 15mm or 20mm endcaps. We do not offer QR endcaps for the 73mm flange hub.

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Can I convert my Chub SS front hub to a thru axle?

The Chub SS hub is QR only. For thru axle hubs we recommend one of our e*thirteen from hubs.

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pdf Chub Service Manual - Fix Up Your Chub
pdf Chub Wheel Building Dimensions - Hub specs for your Chub
pdf Chub Torque Specs - How to tighten your Chub

Chub hubs come with endcaps and mounting hardware installed. Instruction manual with wheel building dims is included.

Speak with your local wheel builder for help with spoke lengths. We do not make spoke length recommendations. Hub dimensions can be found in the tech info tab.