You can purchase the orifice bearing or rear bearing housing separately on this website.

1. Open the quick release lever and unscrew the knob. Remove the knob and washer, then slide the lever shaft out of the wheel sides and maiden.
2. Set the new maiden in place, aligning its holes with the holes in the wheel sides. The logo on the front maiden should be at the front of the wheel. The flat face of the rear maiden should be at the back of the wheel.
3. Push the quick release lever shaft all the way through the wheel sides and maiden. Replace the washer and knob on the end of the shaft.
4. Tighten the knob until there is about 1/8" of space between the lever and the wheel side. Close the quick release lever.
5. The knob should be just tight enough that you need firm pressure to close the lever. If the lever closes loosely, open the lever, tighten the knob slightly, and close the lever again. If the lever requires a lot of pressure to close, loosen the knob slightly.