BMX race forks

What a rigid fork brings to BMX racing

In BMX racing, a rigid fork provides a steering feel without any float, essential for maintaining your line at the starting hill, chaining jumps, and diving into berms. No suspension absorbs energy: every push on the handlebars is transferred to the front wheel, and it’s the rider's arms and legs that take the impact on landings. Carbon is dominant in competition, as it combines high lateral stiffness with a reduced weight, giving a noticeable advantage during accelerations. Aluminium remains a sturdy alternative, while chromoly, being heavier, is reserved for freestyle practices, where forks endure repeated grinds and jumps.

Other suspensions

Suspensions and forks also come in the following types:

• MTB forks.
• City forks.
• Road forks.
• Hybrid forks.
• Shock absorbers.
• Accessories.

All suspensions can be found on the suspensions page.

Box One XE Expert: one inch steerer and choice of dropouts

The Box One XE Expert from Box Components, an American specialist in BMX racing, combines carbon fork legs with a one inch straight aluminium steerer from the 7000 series. This one-inch diameter is designed for Expert size frames, intended for intermediate-sized riders; a frame with a one and an eighth inch or tapered headtube requires a different fork. It comes with ten millimetre dropouts for a standard hub, or twenty millimetre dropouts for a stiffer thru-axle hub. Before ordering, check the axle of your front wheel, then the length of the steerer needed, as the fork comes uncut.

Cutting the steerer and fitting the fork

The steerer is cut to the correct length once the stack height is known: add the headset cup, headset, any spacers, and the height of the stem, then subtract three millimetres to ensure that the cap tightens effectively. For a carbon fork, the cut is made using a guide and a fine blade, without crushing the fork legs in a vice. The crown race of the headset is removed at the base of the steerer before assembly. Finally, the front wheel is firmly tightened in the dropouts; in BMX racing, the only brake is at the rear, so the fork does not have any brake mounts and remains as light as possible.

Good deals

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Frequently asked questions

How can I tell if my BMX frame accepts a one inch steerer?

You need to measure the inside diameter of the headtube or check the frame's specifications. Smaller frames often use a one inch steerer, while larger ones use one and an eighth inch or tapered steerer.

Is a carbon BMX fork fragile?

A race carbon fork is designed to handle starts, jumps, and landings on the track. It is vulnerable to sudden impacts, such as a fall onto an edge or excessive tightening, which should be avoided.

Ten or twenty millimetre dropouts: how to choose?

The choice depends on the front wheel hub: ten millimetre axle or twenty millimetre thru-axle. The twenty millimetre axle stiffens the front end but requires a wheel equipped with the corresponding hub.

What size rider corresponds to an Expert fork?

The Expert size is aimed at riders of intermediate size, often teenagers, between Junior frames and Pro frames. The size of the frame remains the reference for choosing the fork.

Should I grease the steerer of a carbon fork?

You do not grease a carbon steerer: you apply a carbon assembly paste under the stem. It increases grip and allows you to tighten to the specified torque without crushing the steerer.