For B.O.R Fatbike-170RDS-cranksets and Tune Fatbike-cranksets with “Smart Spindle System”. For fatbike frames with 121 mm wide BB121 bottom bracket shells and 170/177RDS (Rear Dropout Spacing).
Also suitable for fatbike-cranksets from other manufacturers with a 30mm spindle and with a K-factor at least 123,5mm wide. In combination with a fatbike frame with 121mm wide BB121 bottom bracket shells and 170/177RDS (Rear Dropout Spacing).
technology / finish:
- fatbike 170/177 RDS
- NOT suitable for downhill / enduro!
bearing / seals:
- special bearing with 2 rows balls per side
- professional bottom bracket tool necessary
- BB30 in 30x41x10
- Enduro-seals 30x42x1,5 (contact lip seal)
This “fatbike BB121-bearing-kit” is suitable, like all other fatbike-bearing-kits for the “Smart Spindle System”, solely for cranksets with 30mm spindles! This “fatbike BB121-bearing-kit” works with frames with BB121 bottom bracket shells only.