Alex R390 20" x 1-1/8" 36 Hole Black with Silver Sidewalls Brake Compatibility: Rim BrakeERD: 430mmHoles: 36spokesISO Diameter: 451Material: AlloyRim Center Offset: 0mmRim Depth: 19.1mmRim Detail Color: BlackRim Detail Color: Black/SilverRim Diameter: 20"Rim Holes: 36 HolesRim Width: 19.6mmValve: PrestaWeight: 322g