Shimano XTR M970 Crank/Bottom Brackets Sets Shimano XTR M970 180mm Crankset w/BB 443222t

Shimano XTR M970 CrankBottom Bracket Sets incorporate the benefit of rigidity with minimal weight of the Hollowtech II combined bottom bracket and crankset system. The new FCM970 manages to drop even more weight while increasing shifting performance and durability. Composite chainring design for Improved durability Inner and outer chainrings are nickelplated AL7075 Middle chainrings has titanium teeth mounted to a composite carbon fiber carrier 68 or 73mm BB shell