Topeak XC1 & XC11 One Set for 29" Wheel Defender Front and rear fenders offer excellent coverage and easy adjustability Front fender mounts on fork lowers and fits 36-48.5mm fork legs Rear fender mounts on seat post with a QR clamp that fits 25.4-24.9mm posts Front: 13"x9.4"X7.5" (fork front), 9.1"X15.7"X11.4" (fork back); rear: 26.4"X4"x3" Weight: 350G (front), 220G (rear)