Tallest tire on 20 inch rims no lift

[N2MoPar]

I've got a 2021 Bighorn 1500 with factory 20 inch wheels, stock suspension. Tires are 275/55/20 which need to go. I had the same factory rims on my 2016 Bighorn and I put 275/65/20s on it with no rubbing on a stock suspension.
I want to put the same tires on my 2021 but I've heard they won't fit- I talked to a guy with a 2021 like mine with factory 20 inch rims and he put 275/60/20 tires on his but said the front will rub If he cranks the steering wheel all the way over.

 

[CanuckRam1313]

I'm currently running with LT295/65R20 Michelin Defender LTX M/S tires on my truck (they are 35's when looking at the tire specs for OD) and love them! The height is great and the ride is fantastic!

I have zero rub and can make full stop-to-stop turns with zero issues.

Albeit, I do have Bilstein 5100's all around with the fronts set at 2.1" height adjust and stock springs all around.

However, I was previously running LT285/65R20 BFG KO2's before I installed the Bilstein 5100's and still had zero issues.

 

[N2MoPar]

Do you have a picture