CeramicSpeed BSA 30 BB Coated Black for 30mm Triathlon The upper part of the

The upper part of the aero socks has a technical fabrication with a silicone finish

Sizes: 380/400/420 mm

2 dust covers

and improved ergonomics ensure comfort and secure grip

CeramicSpeed BSA 30 BB Coated Black for 30mm Triathlon The upper part of theBSA 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. Its 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