the 150 size varies between brand of tires but for the most they all should fit. Everyone that has installed the hugger has done it slightly different than the other. By moving the hugger forward towards the front and spreading it out more will make even more room for a larger tire but that is really not necessary.
Wayanlam's:
Supermanster's: he has a 4.5" rim and and a 160 tire. His hugger is spread out more for clearance.
Mine with the stock 130:
