H Plus Son SL42 Rims have a machined side wall. Item Specifications: Color, Black, Weight, 600, Hub Drilling, 32, Rim Depth, 42, Manufacturer Spec ERD, 508, Valve, Presta, ISO Diameter, 571 / 650c, Wheel Size, 650c, Tire Type, Clincher, Rim Center Offset, 0, Rim Joint, Welded, Brake Track, Machined, Defined Color, Black, Rim Width (External), 19.5, Rim Material, Alloy, Rim Width (Internal), 13.5, QBP Measured ERD (mm), 506,.