You can always look for a more mild flared fender for your truck that wouldn't require as much tire/suspension to fill. Fiberwerx makes top notch fiberglass but it all depends on how the truck is set up. I have seen some stock trucks with fiberglass and big tires, sitting low actually look good. But @01f1502wd
is right. They are typically designed and used for people running long travel kits mainly for tire clearance.