TC Bros. 6" flat profile fenders are among the highest quality you will find. Unlike others on the market, our fenders are actually designed for motorcycle use. This is NOT another re-labeled trailer fender that doesn't fit the profile of a motorcycle tire properly. These fenders feature a 27" diameter (13.5" radius) that follows motorcycle tires made for both 16" and 18" rear wheels. They are made from heavy duty 14 gauge steel to survive the abuse that hardtail rigid frame choppers and bobbers can provide. They are undrilled for a universal fit allowing you to cut/drill to your custom application. 6" width works great for up to a 140 series tire.