ADA 3rd bearing support to prevent crankshaft damage under heavy demanding riders.. High-quality sealed bearing, billet bearing housing with ADA racing logo engraved into the housing.Comes complete with all mounting hardware. HP models only come in anodized silver for corrosion resiatance. For Sport / Liquimatic / S25 / X-ped / Super X-ped only. Long drive spindle required, but not included.