Traxxas 17mm Splined Wheel Hub Set (Blue) (4)Newly designed 17mm racing hubs and wheel nuts incorporate new features and benefits that add both strength and looks. For precision alignment and unsurpassed torque handling the splined design interlocks with the new 3. 8" dish racing wheel for a solid fit, lap after lap. The ground breaking new design also accepts traditional aftermarket 17mm hex wheels.