CeramicSpeed BSA30 Bottom Bracket

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BSA comes from British Standard Cycle, aka English threading. English threading on road bikes means a 68mm wide, 34mm inside diameter shell with reverse threading on the drive side . It’s the most common threaded standard employed today. This kit allows you to fit 30mm thru-axle cranks, like those from Rotor, to fit in the tight space of this 34mm spindle.Choose between two bearings for the cups. Standard Bearings have low drag thanks to hardened-steel races and our CeramicSpeed Balls. Coated Bearings have those same balls installed on coated, hardened-steel races for longer life and less bearing drag.In the box: 2 threaded cups with bearings installed 2 1mm spacers 2 0.5mm spacers 2 dust covers O-ring All Round Grease Decal Spacertube Show more