DOES ANYONE KNOW HOW BIG OF A TIRE YOU CAN MOUNT ON A 2006 CHEVY 2500HD 4X4?

[mountainhorse]

I'm trying to find out what is the largest tire you can put on a STOCK 2006 Duramax 2500HD 4X4 Extended Cab???

Considering 255/85/16's (33.2" dia)

I dont want to cut or lift anything.

Thank you in advance

MH









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[mike_s]

On a stock height, with stock wheels, 285/75R16 is as big as i would go comfortably. A bit wide for the stock 6.5" wide wheel, but it works.

Your 255/85R16 will be a bit smaller, by around an inch, so should be just fine. Stock size in inches is 30.5x9.5 ish.

I ran 285/75R16 on my '03 lowered 3" without clearance issues.

 

[STEVE TWEET]

Just put new tires one my 2006 gmc 2500hd duramax crew cab and I went with the 265/76/16 hankook dynapro atm's. Love the tire so far and there is about 3/4" clearance without the torsion bars tightened. They fill out the wheel well much better then the original stockers and have not noticed any MPG difference. I have not had to use 4 wheel drive since I have put them on and it is ICY and hard packed snow here in eastern south Dakota. I thought about 285's but for stock rims that to me was to wide and there is a slight rubbing when turning sharp (until they rub enough on the inner fender well and create there own clearance). just my 2 cents about what I did.

 

[phatty]

You will have to trim a little with a 33" tire.

32.5" will rub if you are backing up and hit a bump with the wheels turned just right.

Options are trimming plastic or cranking torsion bars for anything above 32.5"

 

[Blk88GT]

Steve and Phatty are correct. I also have an 06.

 

[Dogmeat]

I fit 285/75/16's on my 2005 2500HD with no trimming or cranking. You will rub a bit on the inner fender with them, but it isn't bad, its only at full lock, and I put 90,000 miles on that truck like that without issue. That is also the largest full size spare you can fit on the truck as well and that is just barley and you might even rub just a tad against the rear shock.

Anyone who tells you cranking the torsion bars doesn't effect ride is an idiot, period. I've never ridden in a truck that didn't ride like pure **** after doing that. If you crank the t-bars, go up MAYBE 1/2 an inch at the front valance, not more. Also make sure you get it aligned afterwards because it will be toed out.

 

[NDFARMER95]

285/75/16 is your best bet. There is a happy medium for the bars. Gotta get it off sitting off the stops. Buddy has a duramax and it rides like a dream.

 

[mountainhorse]

I really don't want to go wide with the tires.

Wondering if narrower tires like the 255's will have less clearance issues??
How much does offset affect this??

Funny... 31's look tiny on the truck (235/85/16)....GM didn't make much room.

 

[Dogmeat]

I really don't want to go wide with the tires.

Wondering if narrower tires like the 255's will have less clearance issues??
How much does offset affect this??

Funny... 31's look tiny on the truck (235/85/16)....GM didn't make much room.

I think a 255/85/16 is going to require you to crank the bars at least a 1/2" or maybe even a little more at the valence, especially at full lock, and I'm pretty sure it will rub on the inner fender ... but I wouldn't go hog wild cranking the bars, even with a so-called "leveling kit" that has the longer shocks, etc.

255/85/16 is a 33.1" OD, 285/75/16 is 32.8" ...

Do you wheel this truck at all or are you mainly looking for some added clearance pulling into unplowed lots? If you don't wheel it, I'd say put the tires on, adjust the t-bars as little as possible, have it aligned and go ... But, if you bounce the front end a lot you might bust the fender linings out or something.

My rule of thumb for torsion bar height on my 2000 1500 and my 2005 2500HD was to align the lowest part of the front valance with the centerline of the hub .... that gave me enough clearance, looked better and the ride didn't suffer a lot .... Cranking the bars up more than that the ride was pretty horrible.

 

[IDspud]

Narrowing up the tire will allow you to go a little taller, the edge of the tire on the back of the wheel well is usually the first rub point.
On the 06 and similar you can actually gain about a half inch of clearance with a zip tie. Go up behind the liner and you will see the parking brake cable. It pushes out on the liner as it bends to the rear of the truck. A zip tie looped around it will pull the pressure off the liner without affecting the cable. If you have a noise usually occurring when backing out of a tight spot, this is a good place to look.

 

[summ8rmk]

265/75 r16
Looks good doesnt rub and a very common size.
(Common size means easy to find and usually cheaper)
Hankook dynapro atm are awesome tires too.

Riden the Yamacat

 

[Dirty Steve]

I had 285/75/R16 on my '06 with the stock wheels and I didn't care for the look. Too wide for the stock rim. They did not rub at stock height though.

I put on a Cognito leveling kit and a slight fender trim and ran 305/55/R20's with some pretty good offset loved the look.

Went to 285/55/R20's on the new one. Has a Cognito leveling kit and less offset on the wheels.

X2 on the Hankook Dynapros. I ran them on both trucks and both are diesels. I tow 12,000 lbs 75% of the time the truck is on the road. I just replaced the 1st set on the white truck at 53,000 miles. They still had enough tread to pass DOT inspection, but I wanted new ones for the winter. Great all around tire and great price on load range E.


Sent from my DROID RAZR using Tapatalk

 

[gonehuntnpowder]

Ran 255 cooper st's with the torsion bars cranked a little on my 05 with stock wheels. Loved them. Rubbed a little on tight turns but never hurt anything. IMO don't do front leveling. You can get all you need just tightening the bars.

 

[fraufarm]

You'll be good with 255/85/16.
They're a bit narrow but will work good. 285s are a bit wide on factory wheels but look nice.

Worst case scenario you'll have to give a few turns on torsion bars (maybe shock extensions if lift over 1.5") and align it. May have to trim a bit on front air dam but it's not noticeable.

Good luck!!

 

[mountainhorse]

Ok... It seems that 32" is the largest tire you can put on the truck without having clearance issues and leaving it stock.

For me, inside the rear wheel openings looks pretty badd... 31" tires look really small with all that space in there.

Raising the front... not really what I'd like to do either.

So... My question would be... is it possible to lower the rear of the truck to level it off... It will make the rear-wells look less cavernous IMO.

Anyone "level" their truck by lowering the rear as opposed to cranking up the front??

If so, any links to the parts I would need? (extend the rear shock mount, shackles etc)???








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[ndC7M8]

fraufarm knows lots about GM wheel & tire combos that's for sure

 

[summ8rmk]

Put a camper in it. That should drop the back. Lol

Ridin da Yamacat

 

[hivoltagesledhead]

285/75/16 on my stock 06 dmax rims w/cognito leveling kit and green keys.....still had to trim the valence under the front bumper a bit...rides like a dream though !! Also has airbags in the rear.

 

[summ8rmk]

If there is a block between the axle and leafspring remove it.
If there is not a block then u can buy a longer shackle to drop the rear. Just look for 2wd lowering kits. The rear mounts should be the same between 2wd and 4wd.

Ridin da Yamacat

 

[MORSNO]

Ok... It seems that 32" is the largest tire you can put on the truck without having clearance issues and leaving it stock.

For me, inside the rear wheel openings looks pretty badd... 31" tires look really small with all that space in there.

Raising the front... not really what I'd like to do either.

So... My question would be... is it possible to lower the rear of the truck to level it off... It will make the rear-wells look less cavernous IMO.

Anyone "level" their truck by lowering the rear as opposed to cranking up the front??

If so, any links to the parts I would need? (extend the rear shock mount, shackles etc)???
.

There are quite a few guys running 2" drop shackles on their Duramax's. Check out the duramaxforum.com

Personally I think the 2" drop makes the truck look good, still rides nice, no payload issues, no front end isssues or parts prematurely wearing out.