Quick wheel questoin and i have already searched. I am about to order wheels for my 3/4 ton conversion i am going to run 15's cause i have good 15 inch tires. I was looking on national wheel and tire, at the eaton 15" steel wheels and it says 3.5" back spacing for minimal caliper grinding, but wouldn't i be able to grind lest with 2.5" back spacing. I just wanted to clear this up before i order. thanks for the info fellas.http://www.ntwonline.com/acb/showdetl.cfm?&DID=48&Product_ID=2202&CATID=11 Edit: i will probly buy procomp extreme rockcrawler steel wheels.