Maximum Wheel & Tire size for GMT400 trucks

bcrooms · March 11, 2019

Guys,

I recently acquired a set of 2016 Silverado 18" wheels from a friend...and would like to have these on my 1997 K1500.

The stock size for the wheels is 265/65R18 which I know will fit under my truck...but I am wondering what the maximum tires size would be for an 18" wheel on the GMT400s just in case I decided to get larger A/T tires.

bronyaur · March 12, 2019

I also got a set of 2016 Silverado 18" rims and put LT275/65R18 tires on them and I have had 0 issues. You might get away with 285 width, but that's questionable. The guy at the tire shop told me the LT275/70R18 would not fit.

bcrooms · March 14, 2019

On 3/12/2019 at 4:54 PM, bronyaur said:

I also got a set of 2016 Silverado 18" rims and put LT275/65R18 tires on them and I have had 0 issues. You might get away with 285 width, but that's questionable. The guy at the tire shop told me the LT275/70R18 would not fit.

Just what I needed to see! Thanks I haven't seen many GMT400's in that color