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does any one know what is the biggest size tire i can put on my stock 18" rims on a 2017 chevy 2500 ltz diesel midnight edition
You can probably safely run 275/70R18 or 285/65R18, 295/70R18 might fit with torsion bars cranked, but if you want to try, mount a front one and check it for fit. They wouldn't fit on my 2017 3500 with after market wheels due to the difference in offset.
 

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You can probably safely run 275/70R18 or 285/65R18, 295/70R18 might fit with torsion bars cranked, but if you want to try, mount a front one and check it for fit. They wouldn't fit on my 2017 3500 with after market wheels due to the difference in offset.
What was the difference in offset and what problems did you encounter?

I’m trying to figure out a larger tire for my 2018 2500. Working with a 20x9 +20... OEM is +44.
 

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What was the difference in offset and what problems did you encounter?

I’m trying to figure out a larger tire for my 2018 2500. Working with a 20x9 +20... OEM is +44.
I went with a 18x9 +12 and it gained me 1 1/2 inches of clearance from my upper control arm ball joint location to make running tire chains safer. With the tire offset to the outside more, it is easier to make contact with the outside of the rear part of the fender. I can fit 275/70 or 285/6518 and they don't rub, still kind of tight for chains at full crank though.
 

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Had my GMC 3500HD all Terrain for 3 months now. Stock wheels 18's, tires need replacing, currently have 265/70/18 Michelin on them.



I want to up side tires, keep stock wheels if possible (unless there is any gain on changing). I plan to use truck primary for pulling my race car trailer 30ft (race mk1 custom rabbit), so need tires for that usage. I am thinking going 285/65/R18, not sure what type of tires though.



Any help on size and brand of tires would be appreciated. thanks Simon.
 

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Had my GMC 3500HD all Terrain for 3 months now. Stock wheels 18's, tires need replacing, currently have 265/70/18 Michelin on them.



I want to up side tires, keep stock wheels if possible (unless there is any gain on changing). I plan to use truck primary for pulling my race car trailer 30ft (race mk1 custom rabbit), so need tires for that usage. I am thinking going 285/65/R18, not sure what type of tires though.



Any help on size and brand of tires would be appreciated. thanks Simon.
Either 285/65R18 or 275/70R18 would be a good choice, speedo should be right on. As for brand, if highway and towing is primary, I would stick with Michelin all season. If you want more traction, I am very fond of the new Dick Cepek Trail Country EXP. mine are wearing very well and they have good traction and not too loud.
 

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Either 285/65R18 or 275/70R18 would be a good choice, speedo should be right on. As for brand, if highway and towing is primary, I would stick with Michelin all season. If you want more traction, I am very fond of the new Dick Cepek Trail Country EXP. mine are wearing very well and they have good traction and not too loud.

Thank you for quick reply. I see those sizes brings me in at



285/65R18 = 32.5"

275/70R18 = 33.16"


Doing some research these sizes seem to be within the band of not rubbing or cutting of front bumpers, mud flaps, etc. Awesome.


thanks







more traction seems always a good idea!



thanks Simon.
 

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Hi all! I know this thread has been out here for awhile. I just put 275/65/20 on my stock 2018 2500hd LTZ. no modifications at all, no rubs, etc.
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IMG_20200627_200823.jpg IMG_20200627_200914.jpg
 

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Only by people with altered trucks. Everyone had an opinion but never proved 285/60/20 would actually fit on a STOCK truck...or provided pics confirming this. That's the problem..opinions from people with altered trucks..no pics and facts. The original question was how big on a stock HD? A recent poster just confirmed 275/65/20 fits, but will a 285/60/20 fit = a bigger tire again? And even more recently and specifically the BFG KO2? As it sits this forum is still waiting +80 posts later for an actual answer on the BFG 285. At least no one started an entirely new post and utilized the current threads to be efficient and keep data consolidated.
Here it is Thomas :) 285-60-20....ok maybe I cranked the torsion bars 3-4 turns by 40k later + no rub no issue.
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