I have a 2006 F150 with a 2.5" leveling kit and 20"X10" diamo wheels with an -18 offset. Currently there is a set of 305 55r20 Terra Grapplers on it but they are pretty worn out. The guy I bought it from just purchased the wheels 1 month ago and only put the used TG's on it. My question is do you think that a set of fresh 305 55r20's will fit or should I go a little smaller like a 305 50r20. I do notice that on this set there is a small rub if I have the wheel all the way cranked to the left but that is the only time I have noticed it. Thanks

 

I'd stick with the size you have now, if your truck is a 4x4, and do a little trimming to eliminated the rubbing. Your rubbing is caused by the width of your wheels and offset.

 

Thanks for your response and your help....and yes it is a 4X4.