Ultra4 has grown well beyond the performance of those days of early racing. With that incredible growth, sometimes finding improvement in the parts you've come to rely and depend on requires not just a tweak here and there, but a full on re-thinking of the materials an processed used to create it in the first place. Welcome to the next level of Ultra4 braking performance, now made possible with the all new chromoly heat treated Spidertrax Pro Series Rotor.
Ultra4 braking just got serious.
This Pro Series Rotor is designed to work with Spidertrax 5-1/2" BC Hats. Rotor measures 3/8" thick. To clear the diameter of this rotor, a 17"+ wheel is required. Brake Hat mounting hardware included.