No unnecessary space between rear tire and fender, as these steel rear fenders fit tight on rear wheels in hardtail frames. Available in 9", 11", 12 1/2" and even 13 1/2" wide. Fenders have two internal steel wire tunnels to route your wiring. These tunnels also provide extra rigidity to the fender. Fenders are phosphate etched finished to prevent for corroding and to give a good basis for primers to adhere to. They come un-drilled for easy set up in the way you like it. These "RSD" fenders have the chain notch on the right side for use in conjunction with Right Side Drive transmissions.