Wheel Spacers??
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The only thing wheel spacers are gunna do for looks is make the wheel stick outside the fenders. Just to be devils advocate here are a few negatives to them though. First of all they can cause the tire to rub against the wheel well when turning hard. Second it makes the tires stick out. I admit i kinda like that look too but it is illegal for a tire to stick outside of a fender without some kind of protection to keep the tire from through debris into the air while driving. The final issue with spacers are that they put undo stress on axles. This isn't a huge deal for the front end because it is an independent setup , but for rear axles this puts excess stress on bearings and the differential assembly that it was designed for due to a larger moment created by placing the load (i.e. the weight the tire are bearing) farther away from the bearings.
With all of that said however, as long as you are not towing near the truck's limits you are extremely unlikely to do any damage to the axles with the spacers on (and if you do there is always that lifetime warranty thing). Also, with the stock tires and spacers i don't think you should have any rub issues. And finally you can always gets fender flares to stay legal (not that too many cops realy care). As always, the final decision is yours as it is your truck and your taste, all i can do is provide info to help you decide.
With all of that said however, as long as you are not towing near the truck's limits you are extremely unlikely to do any damage to the axles with the spacers on (and if you do there is always that lifetime warranty thing). Also, with the stock tires and spacers i don't think you should have any rub issues. And finally you can always gets fender flares to stay legal (not that too many cops realy care). As always, the final decision is yours as it is your truck and your taste, all i can do is provide info to help you decide.