CeramicSpeed BB PF4630 Coated

Thanks to its bearings, the PF4630 bottom bracket MTB has virtually no power loss due to friction. The coated bearings have super round, super smooth CeramicSpeed balls rolling on hardened steel raceways with a metal coating on the raceways, making them exceptionally hard and smooth, resulting in longer life and lower resistance than other options. The bearings are installed in matching cups.