The Shimano SM-BB72-41B is a Hollowtech II press-fit bottom bracket for road frames with an 86.5 mm (BB86) shell.

• Press-fit fitment for 86.5 mm wide, 41 mm diameter shells
• Accepts 24 mm Hollowtech II crank spindles
• Recommended for Ultegra FC-R8100/R8000, 105 FC-R7100/R7000, GRX and FC-RS500 cranksets
• Resin bearing cups with small steel ball bearings and precision seals
• Includes left and right bearing cups plus centre sleeve
• Approx. 69 g; installs with TL-BB12 (tool sold separately)