These ceramic wheel bearings are for BST wheels.
Please call to place an order for other aftermarket wheels OZ, Marvic, PM, or any other rim manufacturer.
Most after market wheel brands are $475 because they have a double roller bearing for the cush drive.
Ceramic Bearings offer 40% less Friction, 60% less Rotating Weight and last 3 to 5 times longer than Steel bearings. Ceramic bearings will lower your ET by freeing up Horsepower that is wasted by conventional steel ball bearings. A typical kit includes 5 bearings, 2 for the front wheel and 3 for the rear (cush drive included).