Tire clearance up to 4.7" on 100mm rims * Compatible with any standard 135mm rear hub or specialty front hubs with rear disc offset * 51mm IS disc brake mount; if an adaptor is required due to caliper or rotor choice you must use a front disc brake adaptor * Not compatible with the Paul 135mm WHUB * 100% 4130 CroMoly; custom tapered and butted blade