Bearing – Enduro Bearings 63803 LLB ABEC 3

11,83 
17x26x7 mm, used as a hub bearing for some hub designs, but more often is used as a pivot bearing

Bearing – Enduro Bearings 6003 LLB ABEC 3

11,28 
17x35x10 mm, used as a BB bearing for older square-taper BBs, and can also be used as a pivot bearing

Bearing – Enduro Bearings 63804 LLB ABEC 3

9,75 
20x32x10 mm, bearing for some hub designs, but more often is used as a pivot bearing

Bearing – Enduro Bearings 3001 LLU ABEC 3 Double Row

13,80 
12x28x12 mm bearing for some quick-release hub designs and has been used by Rocky Mountain as a suspension pivot bearing.