SHIMANO DEORE - MTB crankset - 2-PIECE CRANKSET - Q-Factor 172 mm - chainline 52 mm - 1x12-speed The SHIMANO DEORE FC-M6100-1 crank features directly mounted chainrings, special tooth profiles for better chain retention, and a Q-Factor of 172 mm, compatible with 142 mm or 148 mm frame installation widths.