VELOCITY RACE BOOST FRONT BLACK ISO 6 BOLT DISC HUB

Design and construction

The Race hubshell is machined from aluminum bar with conventional J-bend flanges and anodized in the color range. Bearings are sealed cartridge units in common sizes, replaceable with a bearing press when they eventually wear.

The Race is lighter than the Standard hub because the shell is machined thinner and the axle is a lighter alloy; the flange spacing is the same, so the two build into wheels of similar stiffness.

The hubs are assembled at the same Jacksonville, Florida facility as the rims, which is why hub and rim colors match exactly and why the two are designed to be built together.

A front hub is a bearing carrier with flanges, and that is the whole job of the front Velocity Race hub: two sealed bearings on a stiff axle, end caps for your fork's standard, and flanges spaced to give the spokes a good bracing angle on the rotor side. There is nothing to engage and nothing to swap. Everything written about freehubs and engagement applies to the rear hub only; what you get up front is the same shell quality and the same seals without any of the moving parts.

How it rides

The main reason to choose the Race hub over a DT Swiss 350 or Bitex is the color match with the rims, and a wheel built that way looks like it was made as a set because it was.

Front wheels on disc bikes take a beating from braking: the rotor side sees the whole braking torque and the spokes on that side run at higher tension. That is why we build the front Velocity Race hub with the rotor-side spokes crossed and tensioned to the rim's limit, and why the hub's flange spacing matters more than its weight. Ridden on a rim-brake bike the same hub makes one of the lightest, simplest front wheels there is.

Specifications

Which version this is

Version notes. 6-bolt rotor mount, Thru Axle 15x110mm Boost, 28h, 32h, about 150g, in black. If your frame or fork uses a different standard, the other versions of the Velocity Race hub on this site cover it.

Six-bolt is the original disc mount and still the most universal: any ISO 6-bolt rotor from any brand bolts straight on, rotors are cheap and easy to find anywhere, and the six-bolt flange is a robust, simple interface that has been on mountain bikes for twenty-five years. Centerlock rotors do not fit it.

Sizes, fit and compatibility

It takes J-bend spokes in any gauge; we build most Race hub wheels with DT Competition or Sapim D-Light spokes and brass nipples.

It pairs naturally with the Velocity Blunt 35, Blunt SS, Dually and Cliffhanger, and with any other rim in the catalog that matches its drilling. Tell the configurator your bike type and weight and it suggests a spoke count and lacing pattern to suit.

Build it into a wheel

This hub is live in our Custom Wheel Program for gravel and road disc, mountain bike, MTB single-speed, fat bike and tandem and e-bike builds. Start a build with the Velocity Race Boost Front Black ISO 6 Bolt Disc Hub and the configurator opens with this exact hub pinned at the top of the Velocity list — you choose the rest of the parts and it validates every combination as you go.

Building it at ProWheelBuilder

The Race hub is assembled in Florida; ProWheelBuilder is an independent custom wheel builder in Georgia and not the manufacturer. The build is the same every time: measured ERD, spokes cut to the half millimeter, staged tensioning with a gauge, stress relief, a final true, and tubeless tape and a valve on request.

The configurator shows only rims and spokes that fit the Race hub's drilling and color, strikes through combinations that are not made, and prices the wheel live.