I just got a used 2021 1500 Bighorn with 6'4" box. Prior to leveling it I scoured this formum and did a lot of research online to make sure I wouldn't have any rub. A lot of great info here. I read conflicting reports but wanted to share what I have with no rub.
I have the stock 20x9 rims and put an Eibach Stage 2 on it (no reservoirs) with ReadyLift upper control arms. I put on my Yokohama Geolander AT GO15 295/65/20 from my last truck that have less than 3,000 mi on them. In inches they measure to 35.4" (some websites also have these sized at 35.1" not sure why) x 11.7". I have no rub whatsoever. I've driven full locked steering left and right forward and backwards and on dirt roads with potholes, no rubbing on any components and I didn't have to trim or do anything to the plastic in the fender and wheel well. Just wanted to share because I was looking for info for this exact setup, if you run it with the suspension parts and tires the same size or smaller/narrower you should be okay.
I have the stock 20x9 rims and put an Eibach Stage 2 on it (no reservoirs) with ReadyLift upper control arms. I put on my Yokohama Geolander AT GO15 295/65/20 from my last truck that have less than 3,000 mi on them. In inches they measure to 35.4" (some websites also have these sized at 35.1" not sure why) x 11.7". I have no rub whatsoever. I've driven full locked steering left and right forward and backwards and on dirt roads with potholes, no rubbing on any components and I didn't have to trim or do anything to the plastic in the fender and wheel well. Just wanted to share because I was looking for info for this exact setup, if you run it with the suspension parts and tires the same size or smaller/narrower you should be okay.
