Wheels/tires, 06 Express AWD
 

I want to ditch the 16" wheels for some factory 20" from something like a Yukon or Escalade. I'm finding lots of new take-offs for decent prices with tires already on them, but most of them are 275/55-20. Aside from being 1/2" bigger diameter (which will ironically cure my speedo reading 2mph slow), will those meats fit?

Chevy uses the same fender opening on the front for trucks all the way up to 2-ton+ cutaway box trucks and campers, which use even bigger tires. I can't imagine half an inch making any difference whatsoever. Width could be a concern, and I would check the backspace on the Yukon rims; here again you probably have some wiggle room though.

I would imagine somebody online has to have the dimension details for those rims in a chart so people buying aftermarket wheels can check what will fit their vehicles.

Thanks for the input. I slipped one on the front this weekend and it doesn't fit. Just sitting straight they would likely be OK, but about half a turn of the wheel and they hit the fenders pretty hardcore.
I ordered some 255/55 instead.