SHIMANO DEORE XT - HOLLOWTECH II - MTB Crankset - 181 mm Q-Factor - 1x12-speed The SHIMANO DEORE XT FC-M8130-1 crank features an entirely new construction, using direct mount chainrings, special gear tooth profile for improved chain retention, and a 181mm Q-factor. 170mm arms / 32 t FEATURES Superior chain retention Special MTB gear teeth profile improves chain engagement and retention DYNAMIC CHAIN ENGAGEMENT+ Rigid and lightweight design for aggressive trail riding Hollow forged crank maximizes power transfer while limiting weight HOLLOWTECH II Q-factor: 181 mm Chainline: 56.5 mm 157mm OLD