1/4" Ceramic Silicon Nitride Balls

These 1/4" ceramic balls (6.350 mm ceramic balls) are made from pure silicon nitride. They measure 1/4" or 6.35mm in diameter and are from our Ceramic Nitride Pro Series material. Price is for one ball.

These 1/4" silicon nitride balls will also fit most front hubs and some bicycle headsets. Specifically they will fit Campagnolo rear hubs and bottom brackets, Shimano rear hubs and bottom brackets, Shimano headsets models M735-M736-M650-M651. The majority of rear hubs will require nine of our 1/4" silicon nitride balls on each side and bottom brackets will use eleven of our 1/4" silicon nitride balls.