Semi-angular box-section double wall rim, T-10 heat treated alloy Double stainless steel spoke eyelets The anodized rims can be used with rim brakes. The anodized finish will wear and reveal the silver colored aluminum. As the braking surface is not CNC finished, there is a bedding in period Double Joint System: double secure pinned and sleeved nonwelded joint ETRTO: 507mm 22mm depth