Velocity Race Super BOOST Rear Black ISO 6 Bolt Hub
The Velocity Race hub is the lighter of the two hub lines the company assembles in Florida, and it is the hub we reach for when a customer wants a wheel that matches from rim to hub. The Race hub has a machined aluminum shell, sealed cartridge bearings and a pawl freehub, and it comes anodized in the same colors as the rims, which is something no other hub maker offers. This page covers the Velocity Race Super BOOST Rear Black ISO 6 Bolt Hub, the mountain-bike disc version in Boost or standard spacing with a centerlock or 6-bolt rotor mount.
These are not the lightest or the fanciest disc hubs we sell, but they are well made, easy to service, priced sensibly and available in a matching color, and for a lot of trail and gravel riders that is the whole brief.
The Velocity Race hub is built to order here. Choose the rim, spokes and nipples in the configurator; the wheel leaves Georgia laced, tensioned and trued.
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 rear freehub runs pawls on a hardened ratchet ring for prompt engagement and swaps between Shimano HG, SRAM XD and Micro Spline bodies. End caps convert the Race hub between thru-axle and quick-release standards, and the configurator lists the axle and driver options for the version on this page.
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. The hubs use common cartridge bearing sizes and simple pawl freehubs that any shop can service, and spares stay available for years.
How it rides
A Velocity Race hub is quiet and undramatic. Engagement is quick enough for technical trail climbing, the bearings spin freely, and the seals keep grit out. It is happy under cross-country, trail and gravel use; for enduro, downhill or e-bike torque we would steer you to a heavier-duty hub.
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.
Specifications
| Position | Rear |
|---|---|
| Axle options | Thru Axle 12x157mm Super Boost Rear |
| Driver bodies | Shimano HG 8,9,10,11 & Road 12spd, SRAM XD 10,11 & MTB 12spd |
| Drillings | 32h |
| Spoke head | J-bend |
| Brake | 6-bolt disc |
| Left flange diameter | 58 mm |
| Right flange diameter | 58 mm |
| Left center-to-flange | 41.5 mm |
| Right center-to-flange | 26 mm |
| Spoke hole diameter | 2.6 mm |
| Weight | 296g |
| Material | Aluminum |
| Finishes | black |
Which version this is
Version notes. 6-bolt rotor mount, Thru Axle 12x157mm Super Boost, 32h, about 296g, 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
The Velocity Race Super BOOST Rear Black ISO 6 Bolt Hub comes in the drillings listed on this page with the axle, rotor and driver options shown in the configurator. 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 with us
We build this hub to order. Open the Custom Wheel Program with the Velocity Race Super Boost Rear Black ISO 6 Bolt Hub already selected and pick the parts around it; it is offered for mountain bike, MTB single-speed, fat bike and tandem and e-bike builds, and the configurator will not let you assemble a combination we would not build.
Velocity's testing and certifications
Velocity USA offers hubs under its own name for road, gravel, mountain, touring, tandem and track use. Velocity's product pages do not state where the hubs are manufactured, and the company publishes no bearing-life, freehub-durability, sealing, load or fatigue test figures and no third-party certification for hubs; the specification tables on its hub pages (weight, bearings, axles) are blank and refer customers to the tech page.
What Velocity does state: most hubs use cartridge bearings "with weather-resistant seals", and Race hubs add "double-bearing seals for added protection." Bearing preloads are set at the factory with no need for adjustment. Velocity cautions that "Sealed does not mean waterproof" - bearings that are submerged, pressure-washed or otherwise waterlogged should be serviced or replaced by a professional mechanic, and service depends on hub type. Velocity sells replacement sealed cartridge bearings in 6001, 6802 and 6902 sizes, offers loose-ball bearings as an option on custom wheels, and ships mountain disc hubs with parts to convert between 9 mm quick-release, 12 mm and 15 mm thru-axle.
Warranty matches all Velocity products: defects in material and workmanship for the life of the product, excluding normal wear and tear, accidents, misuse, improper assembly or maintenance; repair or replacement at Velocity's discretion.
Velocity's videos
Sources on Velocity's site:
- Tech - Velocity USA (Hub Technology section)
- Standard Hub - Rear - Velocity USA
- Road Race Hub - Rear - Velocity USA
- Sealed Cartridge Bearings - Velocity USA
- Hubs collection - Velocity USA
The figures, certificates and media above are Velocity's own. ProWheelBuilder does not run these tests; our part is the wheel we build on the hub.
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.
Warranty
Velocity's warranty. Velocity warrants its rims against defects in material and workmanship for the life of the product, repairing or replacing at its option. Normal wear, accidents, misuse, improper assembly and poor maintenance are excluded.
ProWheelBuilder. Lace this into a wheel here and the finished wheel gets our own one-year warranty as well as the maker's. For twelve months we replace broken spokes however they broke, and the work on the wheel is on us - truing, re-tensioning, a rebuild where it is needed. If the rim or hub is covered by its manufacturer we put the claim in and chase it; if it is not, we supply an eligible replacement rim or hub at 25% off the current retail price. Carriage both ways is the customer's, and this does not cover wheels built from parts you send in.
Full terms are on our Policies & Warranty page.
Race Super BOOST Rear Black ISO 6 Bolt Hub questions
Will my rotors fit this hub?
This is the 6-bolt version: any ISO 6-bolt rotor bolts straight on with six T25 bolts, which is still the most common and the easiest rotor to replace anywhere. Centerlock rotors do not fit it - for those, take the centerlock version of the same hub, listed separately.
What is the difference between the Race and Standard hubs?
The Race is lighter, with a thinner machined shell and lighter axle, and comes in colors; the Standard is the heavier, cheaper workhorse. Internals and flange spacing are similar.
Which freehub bodies fit the Race hub?
Shimano HG, SRAM XD and Shimano Micro Spline, selectable in the configurator for the rear hub.
Can I get the Race hub in a color to match my rim?
Yes. The factory anodises the Race hub in the same colors as its rims; the colors in stock are listed in the configurator.
Is the Race hub e-bike rated?
No. For e-bikes choose a hub with a full-contact or steel-reinforced freehub such as a DT Swiss 350 or Hope Pro 5.
Is ProWheelBuilder the manufacturer of the Velocity Race Super BOOST Rear Black ISO 6 Bolt Hub?
No. Velocity makes the hub. ProWheelBuilder is an independent custom wheel builder in Georgia that builds it into a finished wheel to your spec.
Which axle spacing does it fit?
Thru Axle 12x157mm Super Boost Rear. Measure between the inside faces of your dropouts if you are unsure, or text us.
Not sure? Text or leave a voicemail on 470-253-0929 or email info@prowheelbuilder.com — you will be talking to the people who build the wheels.
