Ultegra/105 level Hollowtech II bottom bracket
Shimano, SM-BBR60, Hollowtech II Bottom Bracket, BSA, 68mm, 24mm, Grey, ISMBBR60B
Compatible with all road Hollowtech II cranks
Comfortable and lightweight to float across mellow terrain. As you step forward, the V-shaped tail tracks straight in powder and pulls less snow to save energy so you can explore longer.
