Cooper 275/60/20

ConnRadd · April 7, 2015

Does anyone know if Cooper Discoverer ATP

275 /60 R20 will fit without having a leveling or lift kit?

Rawyzf · April 7, 2015

In theory it should fit, as 275/60/20 = 33"

I run 275/65/18 which is 32.1" with no issues. In my thread about 18" tire sizes, a couple guys have said they have ran 275/70/18 (33.2") and 285/65/18 (32.6") without any issues at all at stock height.

They do carry the ATP in 275/55/20 (31.9") though, if you are worried about rubbing at stock height.

ConnRadd · April 7, 2015

I currently run the 275/55/20 on my Avalanche. I tried the 60's, but would get rub when backing up with the wheel turned. Was hoping I would be able to a bigger tire on the Sierra. I've been pleased with the last 3 sets of Coopers.

Rawyzf · April 7, 2015

You should be ok, but maybe someone who has run them can confirm.

Do you have pics of your 275/55 Coopers.

ConnRadd · April 8, 2015

They have over 30k miles on them:

Untitled by connradd2000, on Flickr

Rawyzf · April 8, 2015

Thanks! Always had these on 17, 18. They look great in 20 too.

wurgs · April 8, 2015

I have been wondering that too. I'm looking at getting either Coopers or BF Goodrich and would like to upsize diameter to fill in wheel wells a little.

richard10688 · April 8, 2015

Theres a few guys running 275/65/20 on here with just a 2.5 inch level.

crushNchowda · April 8, 2015

My understanding is the 275/60/20 will fit no issue, based on research from this and other forums. I plan on moving up to this size in either the MIchelin LTX A/T2's or the BF Goodrich TA's or Nitto Terra grappler

I want a little more height and more aggressive look/bite in offroad without giving up much if anything in terms of ride/handling