2017 GMC Sierra 1500 tire size questions

[GMCmadness]

1) 2017 GMC Sierra 1500 double cab 4wd

2) Ordered 3.5” (upper and lower spacers) front leveling kit 2.5” rear level kit.

3) stock 18” x 8.5” wheels 24mm offset

4) new tires are going to be BF Goodrich KO2 but want wider/bigger than stock tire size

 

5) what are my size options and/or how do I figure out my size options?

 

thank you

[volfan84]

i'd go with 33x12.5r18 or perhaps the metric equivalent to around 33" tall and maybe a little shy of 12.5 wide.  anything taller and you will have rubbing issues.

[ducklawyer]

Do 305/65r18 or 295/70r18 and post pics!


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[GMCmadness]

Thank you volfan84 & ducklawyer for y’alls responses.

 

My local dealers could get 285/65/18, but after talking to BFGoodrich I learned that in September they released 6 DT sizes of KO2 that come with a with a 50,000 mile warranty but loose their severe weather/snowflake because the tire compound was changed.  The only 18” size they released was the 275/70/18 DT = 33.2”x11” (my buddy put the 275/65/20 DT KO2 on his 2016 f250 last week)   I have put 45k on my 2017 Sierra 1500 in the first 16 months, so I will find out in the next 16 months how this new compound works out. On to the pics (2017 Sierra 1500, 275/70/18 DT KO2, motofab front 3” upper and lower level kit, motofab rear 2” level kit) before and after: