
To determine the bearing model you need in the absence of part codes, start by taking accurate measurements of the bearing: outer diameter (OD), inner diameter (ID) and height (H). In the case of headset bearings, also measure the inner and outer chamfer angles. Input these measurements into the filters to refine your search.
1. Type
2. Outer Diameter (OD)
3. Inner Diameter (ID)
6. Steerer Tube Diameter
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The AR40 is the latest addition to the Foundation lineup. Featuring an aerodynamically optimized 40 mm rim depth front and rear, with a 25 mm internal rim width, the AR40 is designed to deliver ultimate versatility for the road rider and racer looking for performance on and off-road.