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Replacement bearings for all AC-2 hub shell bodies. These are high precision 71804 angular contact bearings. They are sealed and self-lubricating. The unique design of the AC-2 requires the bearing to be used in conjunction with an AC-2 Hub Bearing Cup. The cup has a tapered outer diameter that matches the taper of the AC-2 hub shell bore. This allows for easier installation/removal of bearings as well as smoother operation and prolonged life of the bearings.

IMPORTANT: Angular contact bearings MUST face a certain way. There is a red seal on one side and a black seal on the opposite side. The RED seal always faces out on each side of the hub shell for the bearings to function properly.

-Dimensions: 20mm ID x 32mm OD x 7mm W

-Each hub shell uses two bearings.

Ceramic Hybrid bearing option available.

-AC-2 Hub Bearing Cup is precision machined from 7075 Aluminum & supplied with an o-ring.

-Bearings & cups sold individually.


Shipping to the Contiguous US is included with the price of this item. Items will be shipped USPS First Class Mail. Additional shipping charges apply to Alaska, Hawaii and International orders. You will be sent a PayPal invoice for the additional amount.

Additional information

Weight 0.3 lbs
Dimensions 6 × 4 × 1 in

Steel 71804 Angular Contact Bearing, Ceramic Hybrid 71804 Angular Contact Bearing, Hub Bearing Cup


We are taking precautions to protect our employees and follow CDC and state guidelines. In the meantime, our machine shop is still running, we're here to assist you and we'll be shipping product to help support bike shops during this difficult time.