ACB515H7 (51.5mm OD)
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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 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)
Inner x Outer x Depth (mm): 40 x 51.5 x 7
Inch Dia: 1 - 1 / 2”
Angle / Chamfer (Deg): 45 / 45
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)