Max Tire size on a Stock Height 2015 2500HD

OpsWest · May 15, 2018

On 5/14/2018 at 12:41 AM, z71truck82 said:

Just confirming the black HD has 35x12.5x18 tires with no lift at all? That’s crazy.

Correct, I'm running Bfgoodrich 35x12.5x18 on stock wheels w/ no lift or modification of any kind to the suspension.

I was originally concerned about clearance, but any shop I spoke with or post I read did not actually mount one and check clearance prior to lifting.

Will always consider a lift / spacers or new wheels but for now the rubbing is not an issue.

Driver side rubbing chassis at full lock

passenger side rubbing at full lock

Sway bar has no contact

Edited May 16, 2018 by OpsWest

z71truck82 · May 15, 2018

Okay cool thanks. I ended up ordering 17x9 +18 offset wheels, and 295/70R17 tires (33.3”x11.77”). Hope it will all fit. Might give the torsion bar bolts like 2 full turns to get front end up about .5”. I tow a 7500k TT so want to keep the rake.

Edited May 15, 2018 by z71truck82

Big Whiskey · May 19, 2018

On 5/14/2018 at 2:24 AM, z71truck82 said:

Going to get after market 17s with at least an 18mm offset. Can you attach a link to your pictures please.

I"m guessing that was directed towards me. I don't have any pictures in my gallery, but here's a link to the build thread where I posted pictures of my truck along the way:

z71truck82 · May 19, 2018

Last question...when you turned the keys did you jack up one side at a time or both? I think I will turn 4 times and see if the tires fit. Thanks

Big Whiskey · May 21, 2018

On 5/19/2018 at 2:10 PM, z71truck82 said:

Last question...when you turned the keys did you jack up one side at a time or both? I think I will turn 4 times and see if the tires fit. Thanks

I did one side at a time, but there's no reason you couldn't do both, as long as you can find a good placement for the jack.

gforce_15 · June 12, 2018

Just sharing my experience with my 2018 Silverado HD. With 20x9 wheels +18 offset and Nitto Exo Grappler 275/60/20 (measure 33.25x11), they fit with no rubbing on completely stock height. The tires come VERY close to rubbing on the thick gatorback mudflaps. Without the mudflaps (or maybe with a set of kickbacks), you may fit one size bigger tire with this offset wheel.

z71truck82 · June 13, 2018

Thanks GForce! Would you mind posting a picture, including the ones where we can see how much the tires stick out of the wheel well. Thanks!!

gforce_15 · June 20, 2018

On ‎6‎/‎12‎/‎2018 at 10:03 PM, z71truck82 said:

Thanks GForce! Would you mind posting a picture, including the ones where we can see how much the tires stick out of the wheel well. Thanks!!

here's a couple pics. I'd say the tires stick out roughly 3/4" - 1" passed the fender well.

czamarron5 · June 20, 2018

Anybody know if I can fit Nitto Terra Grappler G2 295 60 R20's on a stock 2015 2500 High Country without doing anything to the torsion bars?

And if it just needs a little adjusting with the torsion bars will it make it that much rougher of a ride?

Thanks!

Big Whiskey · June 23, 2018

On 6/20/2018 at 12:51 PM, czamarron5 said:

Anybody know if I can fit Nitto Terra Grappler G2 295 60 R20's on a stock 2015 2500 High Country without doing anything to the torsion bars?

And if it just needs a little adjusting with the torsion bars will it make it that much rougher of a ride?

Thanks!

If you're keeping the stock rims, they'll probably fit without any lift. However, if they don't, then it won't take much torsion bar cranking to make them clear. And, as long as you keep the front lift at 2" or less (and add shock extensions) the ride will be just fine.

cford716 · June 28, 2018

Anybody know if I can fit Nitto Terra Grappler G2 295 60 R20's on a stock 2015 2500 High Country without doing anything to the torsion bars?

And if it just needs a little adjusting with the torsion bars will it make it that much rougher of a ride?

Thanks!

If they don’t rub your going to be very close. I just put on the G2’s in 275/65/20 with aftermarket wheels at +15mm offset. I was very close to the front fender and would just rub the liner at the back with full turn. Your a little wider but with the stock wheels. Like the other post said if they do rub you probably won’t need much more to clear.

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jerseytaylor · June 29, 2018

On 5/15/2018 at 8:53 AM, OpsWest said:

Correct, I'm running Bfgoodrich 35x12.5x18 on stock wheels w/ no lift or modification of any kind to the suspension.

I was originally concerned about clearance, but any shop I spoke with or post I read did not actually mount one and check clearance prior to lifting.

Will always consider a lift / spacers or new wheels but for now the rubbing is not an issue.

Driver side rubbing chassis at full lock

passenger side rubbing at full lock

Sway bar has no contact

good to see this. now im very much considering running a 35x11.5/20 with my stock 20s. (from research, they appear to be the same width and offest as your 18s. )

2015GMC2500Allterrain · November 11, 2018

I have a 2015 GMC 2500HD All Terrain with stock 18 inch wheels and 265/70r18 tires. What is that largest tires I can fit on these factory wheels without rubbing. I was thinking of the BFGoodrich All Terrain KO2 285/65r18. Thanks for you input

gearheadesw · November 12, 2018

285 75r18 on 18x9 with a +12 offset, the offset had me switching the stock keys for aftermarket torsion bar keys, so I could get the tire off the front mud flap at full lock.