BITEX FB MTF FRONT ISO 6 BOLT DISC HUB

Design and construction

A front hub is two bearings, an axle and a pair of flanges, and the MTF does each properly: sealed cartridge bearings in common sizes that any shop can replace, a hollow alloy axle with swappable end caps, and flanges spaced wide for the rotor side so the wheel is laterally stiff. The shell is machined from aluminum and anodized black. Bitex pairs it with the MTR rear hub, and the FB MTF is the fat-bike version.

This is the front hub, and a front hub has no freehub. What matters here is the part of the hub that carries the wheel: the bearings, the seals, the axle and the two flanges, and the front FB MTF fat bike shares all of them with its rear partner. It is the simpler half of the pair and the one that runs longest between services. The driver and engagement story belongs on the rear hub's page; this page is about a front wheel that spins freely, stays sealed and builds stiff.

How it rides

An FB MTF front wheel spins freely and shrugs off slush and salt with a clean and regrease each spring. There is nothing to go wrong in a front hub except the bearings, and these are sealed and cheap. The FB MTF builds into a stiff fat front wheel on a HED, DT Swiss BR 710 or Sun Ringle rim.

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 FB MTF fat bike 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 15x150mm, 32h, about 238g, in black. If your frame or fork uses a different standard, the other versions of the FB MTF fat bike on this site cover it.

This is the 6-bolt FB MTF fat bike: the rotor bolts to a flange with six T25 bolts, which is the mount most mountain and gravel rotors still use and the easiest to find a rotor for on the road. If you run centerlock rotors, choose the centerlock version of the same hub instead.

Sizes, fit and compatibility

The Bitex FB MTF Front ISO 6 Bolt Disc Hub comes in the drillings listed on this page in 150 x 15mm thru-axle spacing with a 6-bolt rotor mount. J-bend spokes in any gauge; we build most fat wheels with Sapim Race or DT Competition spokes and brass nipples.

It pairs with the Bitex FB MTR rear, and with the HED Big Aluminum Deal, DT Swiss BR 710, Sun Ringle Mulefut and Surly fat rims in the catalog. Pick fat bike as your bike type in the configurator and it recommends a spoke count and lacing pattern for the offset.

Build it into a wheel

This hub is live in our Custom Wheel Program for MTB single-speed and fat bike builds. Start a build with the Bitex Fb Mtf Front ISO 6 Bolt Disc Hub and the configurator opens with this exact hub pinned at the top of the Bitex list — you choose the rest of the parts and it validates every combination as you go.

Building it at ProWheelBuilder

Bitex makes the FB MTF fat bike; 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 FB MTF fat bike drilling, strikes through combinations that are not made, and prices the wheel live.