Need some tire size advice

[Krazycarl]

I bought a 2013 avalanche last year and it is the Southern Comfort edition. I can’t stand the wheels and tires, it’s got 20 inch rims and very low profile tires and I’m curious what is the biggest tire I can install when it comes to sidewall with an 18 inch rim without rubbing the wheel well. The truck has got what I believe is a 6 inch lift. Tried to post a picture, but the site is giving me a hard time.

 

[MarineOne]

How close is tire to wheel liner at closest point in tire swing and what is current tire size?

Willtheyfit.com

 

[Double O7]

The rim offset will also effect the maximum tire O.D. you can use.

 

[DH K8]

Yeti has 35" and 16" rims that stick out. She hate them. I love my 17" original rims with 33" BFG's.