Got 31's on with only a lil hammer on the inside of front wheel well

 

The factory did it for me, so I'll be no help. I had 33's on mine, now 32. The ride is fine, just less mpg's.

 

I had a tire shop test fit both 30x9.5 and 31x10.5. The 31s fit except for them limiting how much I could turn the steering wheel before the tire touched the frame. I ended up going with the 30s.

Also, you can use a calculator to work out the difference in the actual speed and distance and what your speedometer and odometer read when you put on the larger tires. This will allow you to compute an accurate mpg. Note also that putting on larger tires will effectively reduce your axle ratio. This was a second reason I went with the 30s.

https://tiresize.com/speedometer-calibration/

https://tiresize.com/gear-ratio-calculator/