Has anyone mounted 32x11.50 tires on factory 15x8 rims? If so, do they rub at full crank?

You can run 15x8's with anything as wide as a 12.50" tire. I run 33x12.50x15" on 15x8's all the time. However, the issue you run into with a factory rim would be the 5.5" backspacing for most Jeep applications. If you absolutely are set on running the factory rims, order 2 sets (Sets are sold in pairs of 2) of Spidertrax Wheel Spacers here: http://www.quadratec.com/products/92807_001.htm

same issue, but 15x7 wheels from a police dipplamat on an amc eagle.

i guarantee u if u run stock 15x8 wheels on a jeep with 32" THEY WILL RUB!!!!! i have 15X7 and run 31" and they rub on the lower control arm at full crank,get wheel spacers there bout 150$ for a set cdn and will solve the rub other wise just mount them anyways just down try and turn full crank