KINETIC BEARINGS KINETIC BIKE BEARING ACB515H7 (51.5MM OD)
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Part Number: ACB515H7
DETAILS Inner x Outer x Depth (mm): 40 x 51.5 x 7 Inch Dia: 1 & 1 / 2 Angle / Chamfer (Deg): 45 / 45 Bearing ID: 40mm Bearing OD: 51.5mm Bearing Thickness: 7mm Internal Angle: 45 Degrees External Angle: 45 Degrees
NOTE The Planet X Nanolight Ribble R872 Ribble Stealth and De-Rosa R839 have used this lower bearing (but please check your lower bearing size particularly to make sure it is the 51.5mm as we haven't had it confirmed that all these models ALWAYS used this headset/bearing size for the life of this model range)