Quality deep groove ball bearings from SKF. These ball bearings are universally suitable for various uses on scooters, motorcycles and quad / ATV, depending on their design. For example, as wheel bearings, gear bearings, motor bearings or bearings for chassis and frame. Inside diameter (mm): 17 outer diameter (mm): 40 thickness / depth (mm): 12 clearance: without design: OEM open no. for comparison: 430751