Question: What is your bike’s hub width?

Hubs are generally 100mm wide in front and 130mm wide in the rear for road bike frames; mountain bikers generally use 135-142mm front and rear hubs to allow space for disc brakes, which require extra material on the outer edge of the hub for mounting the disc.

How do you measure the width of a hub on a bike?

If you are unsure of your frame spacing or have an older bicycle, measure the hub width to ensure a proper fit. To do this, remove the rear wheel and use a pair of calipers or a ruler to measure the distance between the inner surfaces of the dropouts.

What hub will fit my bike?

Hub spacing is simply the width of the hub of the wheel, as it fits into the frame or fork.

Common Bike Hub Spacing Standards.

Hub Spacing Front Hub Spacing Rear Hub Spacing
Road Spacing 100mm 130mm
Regular MTB Spacing 100mm 142mm
Boost MTB Spacing 110mm 148mm

How do I know what size axle I need for my bike?

For a front thru-axle, this is measured from the inside to inside of your fork. For a rear thru-axle, this is measured from the inside to inside of your frame at the drop-outs. The O.L.D. measurement is listed for many thru-axles, but isn’t necessary if you know the overall length.

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How do I measure my hub size?

To correctly measure the bolt circle of a hub, measure from the center of the hub to the center of a stud and multiple that measurement by two. The second specification to determine is the Inner and Outer bearing size.

What is hub size?

Hub-centric rings are sized from the outer diameter to the inner diameter and are measured in millimeters. The outer diameter is the hub bore, while the inner diameter is the diameter of the vehicle hub itself.

Do hubs make your bike faster?

Hubs make a huge difference when it comes to the performance of the bicycle. The hubs create the connection between the wheels and the frame of the bike, meaning that faster hubs make for a faster bike. If the bike’s hubs contain excess debris within the races that hold the ball-bearings, the bike will ride slowly.

What is hub spacing?

The spacing of a hub is measured from the outside faces of the cone locknuts, where they come into contact with the frame’s forkends. ( Most cartridge-bearing type hubs don’t have locknuts, so the spacing is measured from the equivalent shoulder surface of the axle ends.)

Can you convert QR to thru axle?

You can use through bolts (which can be quick release) in QR dropouts. These require specific hubs that allow for a 9mm front through bolt and a 10mm rear through bolt. On most Shimano hubs (and some similar Formula type hubs) you can replace QR axles with solid axles and use axle nuts on each end.

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How do I know if my bike has a thru axle?

Thru Axles

Your bike has a thru axle if the “drop out” is a hole, rather than a U-shaped dropout. This provides added security because even if the lever on the end of the thru axle flips open, it is still threaded into the frame, holding your wheel on.

How do you measure bike hub spacing?

Hubs need to match the frame or fork they are used in. The spacing of a frame/fork is measured from the inside surfaces of the dropouts, where they come into contact with the locknuts of the wheel’s axle.

Are bike hubs universal?

Most hubs (except Shimano) have both types of hub bodies available so you can run either brand of cassette once you have the right cassette hub body. Campy hubs can be fitted with a Shimano/SRAM compatible cassette hub body.