Compatible with Afterburner MegaExo/V-Drive MegaExo/Moto MegaExo/Moto-X MegaExo, Gap (2010 version) the BB-7000 features oversize cartridge bearings with forged and CNC machined external cups. To keep water and dirt away from the bearings, the BB-7000 uses an internal composite center sleeve with double o-ring seals.