To be the fastest, you want lightweight products, and at 133g the MXR BB is just that. This lightweight Euro bottom bracket has threaded CNC alloy cups, alloy spacers and 4 high quality sealed replaceable cartridge bearings.

• Euro Type 68mm BB shell (BSA)
• 19mm axle compatible (axle not included)
• Variable, adjustable chain line.
• 4 replaceable sealed bearings.
• Alloy CNC cups and spacer kit
• Weight:133g