The Adventures of Sylvester, the 2018 Suburban 3500 HD

[Geotrash]

First one stuck buys first round of beers.

It’s a deal! We’ll go to Waterman’s.

Quick question for you: I can’t remember but are you running 18” tires? If so, what size are they and are you getting any rubbing?

 

[Bigburb3500]

Let me check when I get back to the truck but I know the wheels are 18” but I have factory size tires. No rub at all

 

[Bigburb3500]

I’m running 265/70 R17. So I have a 17” rim not 18”.
What size tire did you end up going with?

 

[Geotrash]

I’m running 265/70 R17. So I have a 17” rim not 18”.
What size tire did you end up going with?

Yep, that’s the factory rim and tire size for these rigs so that makes sense. It’s also what mine currently has on it. Thanks for checking.

My new rims are 18”, and the size that matches the originals in both diameter and width are 265/65R18. And for whatever reason, the only tires they sell in that size - even on tirerack are all terrain. I could go up slightly in diameter and have a much wider selection, but I don’t know if they’ll work without rubbing.

 

[Fless]

If you haven't used it, this site will let you compare the relative sizes: https://tiresize.com/comparison/

 

[Bigburb3500]

Check custom offsets, they have a great tool on there. I plan to go up a size when I need new set.

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www.customwheeloffset.com

 

[Geotrash]

If you haven't used it, this site will let you compare the relative sizes: https://tiresize.com/comparison/

Thank you. That’s how I figured out which 18 inch size was identical dimensionally to the 17 inch size. The question i’m pondering over is if I go up slightly in size, will I have any rubbing on the wheelwells? Ordinarily, there would be many other people who have answered this question, but these 3500s are so rare that I haven’t found anyone who’s done it yet.

 

[Fless]

I'm running 2015 Silverado 18x8.5" wheels with the 265/65-18s in an AT format (obviously, with nothing else available in that size), and they're perhaps 1/2" taller (radius) than my OE 16x7s were with the OE-sized tires. Of course the wheelwell on mine is different from yours, but I don't think you'd have any trouble with one size wider (with the same aspect ratio: 65) if you have decent clearance now.

Here's how my comparison looks. In reality my tires ended up being a little less than 1" overall in diameter.



Most cars I've had the tires up-sized one level when they needed new tires and never had a problem. Messes a little with the speedometer but not by more than 1 mph or so. Speedometers generally read a little low from the factory.