Will not be a problem. I had 305/65/18 on my 2018 stock wheels. I had no issues.

 

Did you have any issues with uneven wear?

 

None. I do rotate my tires every 5000-7500 miles.

 

@LCash1 the factory wheel is 8inches wide and accommodates the 285/65R18 size tire. Here is the difference in size between factory and what tire size you are suggesting.

Let us know if we can help in any way.

 

As has been said already, your 8" wide wheels are within the specs for a 285/65R18 tire, which calls for an 8-10" rim width. You could even go out to a 295 (provided you can find one that fits or you want to lift your truck and run the 295/70R18) on 8" wheels. I'm running 295s on my 2011 on OEM 18x8 Pro4X wheels. So far, wear is good except for a balance issue causing me problems intermittently. Pretty sure these D!ck Cepek tires aren't round, but they're okay for now and I'll run them until they're not. They perform very well off-road and aside from the need to rebalance often, they perform well on the highway.

 

Back in the day I ran 35x14.5x15 swampers on my K5 . It seemed the wider the tire The more issues I had balancing.

 

No
I have stock rims on my 2018 and ride on 285/75R18 (35x11.5) with an RC 3" lift kit.
Hope this info helps.