Shimano BB-ES51 Splined Bottom Bracket - 73mm

Features:

• An 8-spline joint between the bottom bracket axle and crank results in a more rigid, non-loosening crank assembly
• Maintenance-free sealed cartridge keeps out dirt, mud, water and also allows bottom bracket to be installed quickly without adjustment
• Material: Cromoly/Aluminum
• Size: 73 x 126 mm
• Weight: 270 grams