The BSD Substance XL Mid BB Set is designed for 24mm crank spindles, offering optimal performance and durability. It features precision sealed cartridge bearings for a smooth ride and includes fully CNC’d 6061 aluminum spacers for exceptional strength. The spacer kit ensures a perfect fit for your bike. Weighing only 160g, this bottom bracket is a lightweight yet robust option for serious cyclists. SKU: bscr701-03-blk.