For modern disc-brake bikes, SHIMANO E-THRU axles offer ease of use and secure wheel retention thanks to quality materials and SHIMANO's internal cam mechanism.
Ultegra/105 level Hollowtech II bottom bracket set
Shimano, SM-BBR60, Hollowtech II Bottom Bracket Set, BSA, 68mm, 24mm, Grey, ISMBBR60B
Compatible with all Hollowtech II road cranksets