JayO007

wondering if the combine weight of tire and rim will "hurt" the vehicle in anyway?I only have 31K miles still under warranty. I understand gas mileage so far is 16.1 down 1 mpg from my BFG TA KO2 275 65 18. I'm new to this forum any help would be appreciated.

GrasslandHVAC

Well you are going from 32s to 34s and from 10.8" wide to 11.6" wide roughly. So other than the obvious fuel econ loss, your acceleration will suffer, and your truck may hunt for gears on the higway if towing or with a heavy load.
At the very least i would get a tuner and reprogram to recognize the new tire size.

BRUTE448

the 3.7 v6? the truck will run out of steam alot faster turning those tires. i have the 5.0 v8 and onyl went up to 275-70-18 bfg's nad i have 3.73 gears so i still maintain a 3.6 gear ratio. it wont explode but it will take a bit more gas to get er movin.

Ddh1

Depending on offset may rub a little. I have same size trail grapplers and they rubbed a bit with 0 offset wheels. With Terras I'd imagine if they did it'd be pretty minimal if you have wheels with 0 or negative offset