I purchased the bike fenders but probably won't run them as the tires I will use on the track will not fit under fenders. I did purchase street tires & wheels that will fit under the bike fenders and here's what I have: Front Toyo Proxes R888 255/35ZR18 mounted on 9" wide TorqThrust wheels with 5.0" back spacing; Rear Toyo Proxes R888 315/30ZR18 mounted on 10" wide TorqThrust wheels with 5.75" back spacing.