BSA (1.37"), 68mm (Road)For 24mm (Shimano HTⅡ)/SRAM DUB (Road)/30mm (ROTOR 3D+)3-in-1 core system Shimano Standard tool required (44mm, 16 notch)Bearing size: 30x40x7mm, Steel bearing for Road bikeEMA-BSA-SCSB2430$118.00PriceQuantityAdd to Cart