Bottom Bracket Shimano XTR SM-BB93

Bottom Bracket Shimano XTR SM-BB93

The Shimano XTR SM-BB93 is a high-performance HOLLOWTECH II bottom bracket designed for demanding mountain bike use. As an original Shimano replacement part, it is fully compatible with XTR FC-M980 and FC-M985 cranksets, ensuring precise fit and maximum drivetrain efficiency.

This bottom bracket includes replacement bearings and cups engineered to withstand mud, water and heavy loads typical of off-road riding. High-quality sealed bearings reduce friction and deliver smooth rotation, helping you maintain optimal power transfer on technical trails and steep climbs. The BSA threaded design provides broad frame compatibility and secure installation.

Compatible with 68 mm and 73 mm shell widths, the SM-BB93 also supports E-Type front derailleurs. With a low weight of just 71 grams, it is an ideal choice for performance-focused riders seeking durability, stiffness and minimal weight.

• Application: Mountain Bike
• Group: Shimano XTR
• Model: SM-BB93
• Type: HOLLOWTECH II
• Thread: BSA (BC 1.37 x 24)
• Shell width: 68/73 mm
• Mounting: Threaded
• Compatibility: FC-M980 / FC-M985
• Weight: 71 g