I'll be getting new wheels soon and would like some input on choosing backspacing. Not what I need with 15's so they'll fit on a D60 type of stuff, but more like are there any drawbacks to having a wheel with only 3" of backspacing? I've heard the term scrub radius used, and I could use some education on that. Does the farther travel path cause tires to hit wheel wells when something like a 4" wouldn't? I'd like to run 35-36 inch tires on a 10 rim, with anywhere from 12.5 to a slightly wider (14.5 or so) tire. With a 4 inch lift (TC HD's up front). BFG's fit no problem, but getting a tire like a 14.5 inch swamper to fit there might require some trimming.