PF41 Fatbike BB
Wheels Mfg Fat Bike PF41 bottom brackets are manufactured to the current PF41 standard, and are for use in bottom bracket shells that are 121mm. Our bottom bracket consists of two machined cups with sealed bearings pressed in. The female threaded cup is press-fit tolerance, and is pressed in to the frame using a bearing press with our BB86/92 Cup Drift. The male threaded cup is inserted by hand in the opposite side, threaded into the other cup and tightened down. This system secures the bottom bracket in the frame, eliminating loose and noisy bottom brackets.
- Shell Width: 121mm
- Shell ID: 41mm
- Bearings are contained inside cups which are pressed into the frame; shell has a stepped design but there are no snap ring grooves
- Designed specifically for 24mm (Shimano, FSA, etc.) and 24/22mm (SRAM, Truvativ, etc.) spindle cranksets originally intended for external threaded cups.
PF30 Fatbike BB
Wheels Mfg Fat Bike PF30 bottom brackets are for use in bottom bracket shells with a 46mm ID and 100mm wide. Our bottom bracket consists of two machined cups with sealed bearings pressed in. The female threaded cup is press-fit tolerance, and is pressed in to the frame using a bearing press with our PF30-OB Cup Drift. The male threaded cup is inserted by hand in the opposite side, threaded into the other cup and tightened down. This system secures the bottom bracket in the frame, eliminating loose and noisy bottom brackets.
Note:
Some cranks designed for 100mm BB shell widths and external bearings may not work, or may require additional spacers.*
Wheels Mfg PF30-FAT overall bearing widths:
You should be able to see the bearing surface on your crank spindle as a slightly raised diameter:
If the bearing surfaces on your crank are not wide enough to allow for proper bearing to spindle interface, our PF30-FAT bottom bracket will not work. This may be the case for wide fat bike cranks with spindle lengths of 170mm and above. Please take careful measurements before ordering.
