Hubs for rim brakes generally have axles designed for quick-release mounting. The mounting dimensions are 9x100 mm for front hubs and 10x130 mm for road bike rear hubs, and 10x135 mm for mountain bike and trekking bike rear hubs. The quick-release axles have a diameter of up to 5 mm. This is why some manufacturers also label the hubs as 5x100 mm and 5x130 mm. On very old steel road bike frames, the rear wheel mounting dimension of 10x126 mm is also still found. The 10x130 mm rear wheel hubs can be fitted there. The rear stays on these older frames are flexible enough to accommodate this.
Hubs for disc brakes generally feature axles designed for thru-axle mounting. Many manufacturers allow these to be converted to quick-release mounting so they can also be used on older bikes with disc brakes. Even though disc brakes are the standard nowadays, there are still many mountain bikes, road bikes and touring bikes on the road that have frames and/or forks with quick-release dropouts.
Boost hubs have wider hub bodies and hub flanges and brake disc mounts positioned further outwards. This allows for wheels with greater lateral stiffness due to the flatter spoke angle. The brake discs are also positioned further outwards. Consequently, Boost bicycle hubs cannot be fitted to frames or forks with narrower mounting dimensions. Even if the axle or hub end stops were adjusted, the brake disc would rub against the frame or fork.
These two mounting dimensions are identical apart from the inner axle diameter. The distance from the brake disc mount to the fork dropout is 10 mm. Therefore, Boost 15x110 and Boost 20x110 mm hubs can also be converted to the other mounting standard. Of course, this only works if the manufacturer has fitted the hubs with 20 mm axles and offers suitable end stops for the hubs.
Manufacturers use different designations for the Boost 20x110 mm mounting dimension. The decisive factors are the mounting width and the 10 mm clearance between the brake disc and the fork.
Please note that there is a second front wheel hub mounting standard with 20x110 mm. This was found on older downhill forks, particularly double-crown suspension forks, and although it has the same hub mounting width, the brake disc mount is positioned further inwards than on Boost hubs. The distance between the brake disc and the fork dropout for the DH mounting dimension is 15 mm. Therefore, these hubs only fit into older forks. We strongly advise against using them in Boost 20x110 mm forks. Adapters are available to bridge the 5 mm gap. However, the bolts used to mount the brake disc then become too long and may fail. This must be avoided at all costs with a front brake. The Shimano Saint and Zee front hubs have this mounting dimension, as does the DT Swiss 350 DH OS.
Hubs with the Boost 12x148 mm mounting dimension also only fit into frames with exactly this mounting. Cannondale has several frames in its range with the Boost 10x142 mm quick-release mounting. Boost 12x148 mm hubs can be converted to this mounting dimension. A prerequisite is, of course, that the hubs have replaceable end caps.
Rear hubs: Boost / DH 12x150mm and Super Boost 12x157mm
The Boost 12x150 mm and 12x157 mm hubs have the same hub body dimensions. The 150 mm hubs have a 7 mm shorter axle and hub end caps and can, provided the manufacturer has designed them to do so, be converted to the other dimension. A prerequisite is, of course, that the hubs have interchangeable end caps.
Thru-bolt mounting is often confused with quick-release mounting. The system was developed by DT Swiss when disc brakes first appeared on mountain bikes to achieve greater torsional stiffness in the frame/fork-wheel assembly.
The frames and forks are the same for both thru-bolt and quick-release mounting. However, the thru-bolt axle replaces the hub axle and is then secured with a locknut.
This is only possible with a few hub models, e.g. the DT Swiss rear hubs of the 350 and 240 series. However, DT Swiss does not offer suitable end caps for all freehub body types.
Road and gravel rear hub, Tune Micro CL Rear Hub, 24-hole, Disc Centerlock, for 12x142mm thru-axle fitting, Enduro Ceramic Lifetime Warranty XD15 ball bearings, Sram XDR freehub body
Road and gravel rear hub, Tune Micro CL Rear Hub, 24-hole, Disc Centerlock, for 12x142mm thru-axle fitting, Enduro Ceramic Lifetime Warranty XD15 ball bearings, HG11 freehub body
Road and gravel rear hub, Tune Micro CL Rear Hub, 24-hole disc centre lock, for 12x142mm thru-axle mounting, Enduro Ceramic Lifetime Warranty XD15 ball bearings, HG11 freehub body
Road bike rear hub, Chris King R45 Rear Hub Ceramic, for rim brakes, SSP 10x130mm, 32-hole, freehub body options: Shimano HG11, Sram XDR or Shimano Micro Spline, colour: black
Road bike rear hub, Chris King R45 Rear Hub Ceramic, for rim brakes, SSP 10x130mm, 32-hole, freehub body options: Shimano HG11, Sram XDR or Shimano Micro Spline, colour: silver
Spare part: Chris King replacement bearing for ISO SD, Classic, BMX Boost CL front hubs, stainless steel ball bearing, 1 piece
Spare part: Chris King replacement bearing for ISO AB/ISO LD/Lefty Gen2 front hubs from 2013 onwards, stainless steel ball bearing, 1 piece
Mountain bike rear hub DT Swiss 350 Classic, Disc Centerlock, Ratchet DEG 72 freehub body HG10, Boost 12x148mm thru-axles, 32-hole
Mountain bike rear hub DT Swiss 350 Classic, Disc Centerlock, Ratchet DEG 72 freehub body HG10, Boost 12x148mm thru-axles, 28-hole
Mountain bike rear hub DT Swiss 350 Classic, Disc Centerlock, Ratchet DEG 72 freehub body Shimano Micro Spline, Boost 12x148mm thru-axles, 32-hole
Mountain bike rear hub DT Swiss 350 Classic, Disc Centerlock, Ratchet DEG 72 freehub body Shimano Micro Spline, Boost 12x148mm thru-axles, 28-hole
Mountain bike rear hub DT Swiss 350 Classic, Disc Centerlock, Ratchet DEG 72 freehub body Sram XD, Boost 12x148mm thru-axles, 32-hole
Mountain bike rear hub DT Swiss 350 Classic, DiscCenterlock, Ratchet DEG 72 freehub body Sram XD, Boost 12x148mm thru-axles, 28-hole
Mountain bike, enduro, downhill rear hub, Tune Micro B6 Boost Rear Hub, IS Disc 6-hole, 32-hole, for Boost 12x148mm thru-axle fitting, Enduro Bearings Ceramic Lifetime Warranty XD15 ball bearings, Rotor Sram XDR
Mountain bike, enduro, downhill rear hub, Tune Micro B6 Boost Rear Hub, IS Disc 6-bolt, 28-hole, for Boost 12x148mm thru-axle fitting, Enduro Bearings Ceramic Lifetime Warranty XD15 ball bearings, Rotor Sram XDR
Mountain bike, enduro, downhill rear hub, Tune Micro B6 Boost Rear Hub, IS Disc 6-hole, 32-hole, for Boost 12x148mm thru-axle mounting, Enduro Bearings Ceramic Lifetime Warranty XD15 ball bearings, Rotor HG11
Mountain bike, enduro, downhill rear hub, Tune Micro B6 Boost Rear Hub, IS Disc 6-hole, 28-hole, for Boost 12x148mm thru-axle fitting, Enduro Bearings Ceramic Lifetime Warranty XD15 ball bearings, Rotor HG11
Mountain bike, enduro, downhill rear hub, Tune Micro B6 Boost Rear Hub, IS Disc 6-hole, 32-hole, for Boost 12x148mm thru-axle fitting, Enduro Bearings Ceramic Lifetime Warranty XD15 ball bearings, Rotor Shimano Micro Spline
MTB rear wheel hub, White Industries M15, for rim brakes, quick-release mounting 10x135mm, 32-hole, Shimano HG freehub body, colour: polished silver
MTB rear wheel hub, White Industries M15, for rim brakes, quick-release mounting 10x135mm, 28-hole, Shimano HG freehub body, colour: polished silver
MTB rear wheel hub, White Industries M15, for rim brakes, quick-release mounting 10x135mm, 48-hole, Shimano HG freehub body, colour: polished silver
MTB rear wheel hub, White Industries M15, for rim brakes, quick-release mounting 10x135mm, 40-hole, Shimano HG freehub body, colour: polished silver
MTB rear wheel hub, White Industries M15, for rim brakes, quick-release mounting 10x135mm, 36-hole, Shimano HG freehub body, colour: polished silver
MTB rear wheel hub, White Industries M15, for rim brakes, quick-release mounting 10x135mm, 40-hole, Shimano HG freehub body, colour: black
Rohloff Speedhub 500/14 TS EX OEM, tandem, silver, with threaded axle, for Rohloff dropouts with external cable routing, without chain tensioner, 32-hole
Rohloff Speedhub 500/14 TS EX OEM, tandem, silver, with threaded axle, for Rohloff dropouts with external cable linkage, without chain tensioner, 36-hole
Rohloff Speedhub 500/14 TS EX OEM, tandem, black, with threaded axle, for Rohloff dropouts with external cable linkage, without chain tensioner, 32-hole
Rohloff Speedhub 500/14 TS EX OEM, tandem, black, with threaded axle, for Rohloff dropouts with external cable linkage, without chain tensioner, 36-hole