What is the largest tire size that i can put on my truck without having to do any modifications, e.x. lifts of any sort. 2002 dodge ram cummins turbo diesel.

 

No idea, but that's a sweet truck. I'd say on aftermarket rims you could clear 35's maybe...with the right back-spacing. Just a guess...

 

nice pic lol I think thats me on the other side of ur truck there lol

i still think u should do that 2" lift with 35s especially with ur 4.10s it'd be worth it

 

I think a 285-75-16 (33") would be the largest tire.

 

I suppose I could just look this up on the Internet but if you guys would humor a newbie it would be great. I am so used to buying tires for my low slung Audi that I have no knowledge about truck tires. I have the 265-75-16 tires on my truck right now and they seem to be about 31" tall. I always thought the first number group in a tire size was for the width meaning a 265 tire would be 265mm wide. If this is the case why is a 285 tire 33" tall instead of being 31" and just a bit wider?

 

BTW, I have a 1997 1500 4x4 with the magnum5.9(not sure if that matters) and i would like to put slightly larger tires on it to fill up the wheel wells and give it a slightly higher stance. Can I do this with the 285's without having wheel well rub on a factory suspension truck or will I need to add one of the leveling kits that are out there?

 

You are right that the 285 in a 285/75R16 would mean that the tire is 285mm wide. To get that in inches, just divide the 285 by 25.4 (number of mm in an inch). The 75 only means that the height of the sidewall is 75% of the width. So for example:

285/75R16
Width = ~11.2"
Sidewall Height = 11.2 x .75 (75%)= ~8.4"
Rim size = 16"
Both Sidewalls + Rim Size = ~32.4"
Total Tire Size for 285/75R16 = ~32.4" x 11.2"

Make sense?

***All numbers have been rounded. Actual size is about 32.8" x11.2"

I think you can run 285's on stock susp w/o rubbing...

 

As I understand it, its because the second number is the percent of the width that is the sidewall height. So a 285/75 would have a sidewall of 285mm x 0.75 = 213.75mm. So two sidewalls of 213.75mm = 427.5mm = 16.83" of sidewall on a tire. Add the 16" of rim, and you've got 32.83" of total tire height... So if you went with a 285/70, you're looking at 31.7" in height roughly....

Hope this helps!



EDIT: DAMN YOU 2K1!!! Beat me to it...

Cheers

 

Sorry, man... At least you confirmed that I know what I'm talking about...nothing wrong with a little reinforcement.

 

True, I wasn't 100% sure I was right to begin with, but now I am!

From what I have read though, 285/75-16's are about as large as you would want to go on stock suspension.