Max spare tire size?

mr.fickits · August 12, 2013

Hi all,

New member here. Just bought an '04 2500HD 4x4 yesterday.

Has anyone successfully fitted a 315/70R17 (35") tire in stock location between frame rails? Searched around for a bit and didn't have any luck.

Thanks!

akcooper9 · August 13, 2013

I think you'll be hard pressed to make it fit with out removing the hitch etc.

I have 285/75/16 in my spare location and im a half inch from the rear diff

http://www.duramaxforum.com/forum/towing-hauling/140040-aftermarket-hitch-2.html#post1791585

Man With A Gun · August 13, 2013

Carry a puncture repair kit and a small knocker air compressor. Should cover most flat tires.

akcooper9 · August 13, 2013

Only down side is it does nothing for a blow out and that is what I worry most about...

mr.fickits · August 13, 2013

Thanks for the info guys.

I'm good with keeping a full size spare in the bed if someone makes a cooler that mounts in the spare tire location

tyhuck · August 13, 2013

Roof rack over the cab, FTW!

cliobogger · August 14, 2013

I had a 35/12.5/17(or 18) on my 06 1500HD. They JUUUUUUSSSSTTTT fit.

Edit: I did have a hitch on it too.

mr.fickits · August 14, 2013

I had a 35/12.5/17(or 18) on my 06 1500HD. They JUUUUUUSSSSTTTT fit.

Edit: I did have a hitch on it too.

This is good to hear. Thank you.I will do a test fit. If it fits I will post a pic or two.

Wintersun · August 14, 2013

The only tme you would need a spare to exactly fit the other four tires is if you need to be in 4WD on hard dirt surfaces. In 2WD I doubt the limited slip differential would be affected and you could put a front tire on the rear and the spare in the front tire location. The odds of having a rear tire puncture under those conditions are pretty slim.

The difference in the specs for the tire height are based on zero load on the tire. The height of the 285/70R17 tires on my truck with a full load the same height as the stock 245/75/17 tires with nothing in the bed. Worked out well as with a load my speedometer and odometer are dead on.

The spare tires used on many cars have been a great deal smaller than the standard size tires used on the primary wheels and designed for driving the car at 55 MPH to the nearest shop.

If it is critical to have the exact same size spare tire there are tire mounts that bolt to the inside of the bed that would work.