The Storm front is a 120/70 18, and the Azaro rear is a 150/80 16. As for mileage, I've just mounted a set I don't expect high miles from. I just put on a set of Bridgestone BT45Vs, 110/80 18 front and 150/80 16 rear. These things are grippy.I have been gone for a while so i am out of touch, but what size azaro and storm are you using