Service - 157Trail bottom bracket & crank compatibility

The 157Trail platform (157 DH / Superboost) on current Knolly full-suspension and hardtail frames will accept most 55-56.5mm chainline setups.

For information on BB spacing suggestions and chainlines for SB+ setups check out our BB and Crankset Reference Chart.

 

Other useful notes:

  • SRAM's DUB cranksets
    • available in MTB (Boost CL 52mm), MTB Wide (CL 55mm), and Super Boost (CL 56.5mm).
    • MTB (CL 52mm) cranksets are compatible with our 157Trail platform if the chainring is swapped to one with zero offset (see below).
    • MTB Wide (CL55) cranksets will work with the standard 3mm chainring and DUB spacer setup per SRAM’s DUB MTB BB Compatibility Chart.
    • While MTB Wide and SB+ are not interchangeable, they are both compatible with our 157Trail platform.
    • Among others, One-Up and Chromag make zero offset chainrings for older SRAM DUB MTB cranksets - note that 32t is the largest chainring that will clear.
  • RaceFace direct mount (Cinch) cranksets
    • 136/137 spindles will work with the  3mm offset chainring flipped (ie. -3mm).
    • Shimano 12 systems must use an RF Direct Mount SHI-12 ring. Check out RaceFace’s Crank Selection Guide for more information.
  • Shimano Deore, SLX and XT cranksets
    • both 55mm (M*120) and 56.5mm (M*130) chainline options are compatible with our frames
    • XTR cranks have narrower Q-Factor and chainline measurements, so we do not recommend using the 52mm (M9120) crankset. 55mm (M9125) and 56.5mm (M9130) will work.
    • For a 73mm bottom bracket shell, you will need to use 1x 2.5mm BB spacer on the driveside. 

For information on cranksets not mentioned above, please contact the manufacturer for specific product information.