The EVO386 standard is designed for oversized spindles. CeramicSpeeds kit for Shimano allows you to install Shimano or FSA cranks with 24mm thru-axle spindles. The cups come with CeramicSpeed Bearings installed. Both CeramicSpeed Standard and Coated Bearings are available. Both utilize super smooth CeramicSpeed Balls and hardened-steel races. The latter has an additional metallic coating on the races to further smooth and harden the steel, further increasing life and lowering drag.