... 21x1.60 7075 al. material T6 Racing bikes, offroad bikes available One-stop solution from raw aluminium ingot to finished Al. alloy ... treatment: Three stage heat treatment for material and raw rims with T4, T6, and T7 Appearance: Anodizing color like Silver, Black, Red ... , 3.00, 3.50, 4.25, 5.00 widthsAssembly: Used with OEM hubs, spokes& nipples and Prowel available Parts