15\" vs. 16\" Rims I'm gathering parts for my winter buildup of my '96 GMC. Right now I am currently looking for rims and tires. The tires are going to be around 38"-40". I know the 16.5" rims have no safety bead and I like to air down my tires. When I go to the dunes I take my 35's on 15" rims down to 4-6 psi with no problem. Now is it worth the effort to fit 15" rims over a Dana 60 front and a 14FF with discs?? Should I just buy 16" rims and call it good? I am looking at Weld rims and I read if you use an aluminum rim you have to grind too much off the calipers when using a 15" rim. What do you think I should do??