Subrosa's Bitchin' Bottom Bracket spins fast and smooth. It uses two custom R12 mid sealed bearings, and is available in both 19mm and 22mm models.
• Lightweight 6061 alloy full CNC cones
• Custom Subrosa R12 mid bearings with logo and white seals
• Includes: 2 sealed bearings, internal spacer, custom cone washers, and extra alloy washers