Gultnis – Enduro Bearings 61805 LLB ABEC 5

14,55 
25x37x7 mm The most common use for this bearing is as a direct replacement bearing for Shimano external cup BBs when using the plastic Shimano bearing insert. If you wish to avoid using the plastic insert MR 2437 is the correct bearing for the job.

Gultnis – Enduro Bearings 6800 LLB ABEC 3

9,18 
10x19x5 mm used as a hub bearing for some quick-release hub designs, pedals

Gultnis – Enduro Bearings MR 20307 LLB ABEC 3

8,82 
20x30x7 mm used as a front hub bearing, specifically for Mavic and Profile Racing. It is also used by Trek as a pivot bearing

Gultnis – Enduro Bearings 3803W LLB ABEC 3 Double Row

23,95 
17x26x10 mm This bearing is used by Industry Nine in their rear hubs, and by Trek and Niner bike as a suspension pivot.