Bearing Dimensions: OD: 42mm / ID: 30mm / Width: 7mm Direct replacement bearing for BB30 OEM systems ABEC-5 rated bearing with 5/32 Grade 10 balls, the largest in the industry Cryogenically treated races will outlast any other bearing on the market 12% increase in static load rating compared to standard 6806 bearings Dual lip, groove type seals keep dirt out and 90% fill rate grease in Rheolube special synthetic grease is long lasting and protects against contamination Balls are micro-coated with long lasting protection from friction