VMAC Racing Products is the only manufacturer with its own truly Angular Bearing. Manufactured to withstand the day to day abuse any Sprint Car Team has to offer. The 54 Precision Ground Ball Bearings are encased in a Hardened Steel Shell that makes these the best bearings on the market!!F E ATUR E S :Split Inner Races For Easy MaintenancePrecision Ground Ball BearingsSuper Seal Outer Seals100mm OD28mm WidePit Stop USA offers King 28mm Angular Bird Cage Bearing 1725 at low everyday prices. Be sure to check out all of our products from King Racing Products including King Racing Products Birdcages - Service Parts.