Our HG Needle Bearing driveshells are compatible with ISO, Classic, Tandem, and Uni-disc rear hubs. They are available complete with all internals ready to be lubricated and installed, or as conversion kits utilizing parts from your current driveshell. PHB508(B) is for an empty aluminum driveshell requiring the internals from your original HG Needle Bearing driveshell to be transplanted. For replacing worn out driveshell due to worn helical splines or cassette bite. PHB545(B) is for a complete aluminum driveshell, ready to drop in to an existing Needle Bearing equipped Classic or ISO rear hub. Due to Needle Bearing race tolerances, the driveshell's Needle Bearing does need to match the spec marked on your axle. In your order notes please inform us of the spec that your axle has, it's a number from 2 to 4 inside a diamond.
PHB545 - Complete w/internals - Silver, PHB545B - Complete w/internals - Black, PHB508 - Bare Driveshell - Silver, PHB508B - Bare Driveshell - Black