milKit works with all common tire and rim sizes and widths, including 26″, 650B, or 29″, and road, mountain, or city bike wheels. The standard milKit valves have a usable length of 35 mm (1 3/8 inch), and they work for most rims except some special high-profile rims. For high profile rims, there are 45mm, 55mm and 75mm versions of the milKit valves. Click here to see the valve dimensions.