XTR HOLLOWTECH II MTB Crankset 168 mm Q-Factor 2x12-speed




XTR - HOLLOWTECH II - MTB Crankset - 168 mm Q-Factor - 2x12-speed

The SHIMANO XTR FC-M9120-B2 crank features an entirely new construction, using direct mount chainrings, special gear tooth profile for improved chain retention, and a narrow 182mm Q-factor. The FC-M9120-B2 uses a 51.8mm chain line and can be converted between 1x and 2x, with 38-28T chainrings available. On offer are 165, 170, and 175mm crank arms.

  • Front double
  • Combine wide range and close gear steps
  • Alloy inner chainring is installed with outer chainring by bolts
  • Faster acceleration
  • New drive system
  • Smoother driving even over bumpy terrain
  • Special gear teeth profile designed for MTB riding usage
  • Lighter and stiffer design & easy exchangeable chainring by direct mount and one key release
  • Exchangeable of single and double chainring by direct mount
  • Crankset can be used as common component
  • Q-factor: 168 mm
  • Chainline: 51.8 mm



SERIES XTR M9100 Series
Color Series color
Average weight 616
Chainring combination 38-28T
Compatible bottom bracket type_Outboard
Crank fixing screw included
Crank arm length (mm)_165
Crank arm length (mm)_170
Crank arm length (mm)_175
Spider/Gear arms 4
Optional chain guard_Without chain/bash guard
Recommended bottom bracket_Press-fit SM-BB94-41A
Recommended bottom bracket_Threaded (normal) SM-BB93
Threaded bottom bracket shell width (mm)_68
Threaded bottom bracket shell width (mm)_73
Q-factor (mm) 168
Chain line (mm) 51.8
Compatible chain HG 12-speed
P.C.D. (mm) Direct
Rear speeds 12 (Front double)
O.L.D._QR/Nut (mm) 141
O.L.D._Thru (mm) 148