The EVO386 standard is designed for oversized crankshafts. The CeramicSpeed kit for Shimano allows the installation of Shimano or FSA cranks with 24mm through axles. The bottom brackets are supplied with CeramicSpeed bearings already installed. Both Standard and Coated CeramicSpeed bearings are available. Both use super-slippery CeramicSpeed balls and hardened steel cages. The latter have an additional metal coating on the cages to make the steel even more slippery and resistant, further increasing durability and reducing friction.Included: 1 bottom bracket with bearings installed 2 All Round Decalcom dust covers