Execut1ve

The truck had a fairly exciting day, at least for the cold middle of winter. I finally got around to installing the new window motor in the driver's door... now my window isn't held up by a giant bolt anymore! you know you've reached a certain point when you're asking for truck parts for christmas (not to soup up your truck but to repair it lol)

I also took the truck down to the tire shop to have them check a tire which seems to have been losing air. Turns out there was a screw in the sidewall so it wasn't repairable. So I had them put the spare on since they didn't carry tires matching the other 3 on the truck which have plenty of tread left. It turns out the spare is a 265 while the others are 235. Can I do any damage to the truck driving it around with a 235 and a 265 on the back? I drove it back home, just a 10 minute trip across town at speeds less than 40mph

Old_Skl_Raptr

no it wont hurt it. but that is funny your spare is bigger than your regular tires hahahahah!!!

Taterhead

As long as they are the same diameter, it won't hurt. If they are different diameters, it wont affect the transmission, but could affect your differential. The two different sized tires spin at different rates, which in turn cause the the differential to work at all times instead of just during a turn.

You can calculate your overall diameter at:

http://www.precisiongear.com/pgtechtire.htm

Execut1ve

they are different diameters

SultanGris

dont use 4x4! Not sure how it would affect it on the rear, if you have an open diff it wont matter, but not sure about if you have limited slip. Theoretically you would think it would slip limitedly to make up for the dif size, haha, but I would be changing it as soon as possible if i was you.

sherlokhomes

Width hand, the diameters of 2 tires were probably close enough, not so much to worry about. You also have one is open so its not that you put in a clutch pack LSD. If you can not say that something is messed up, so nothing is wasted.front wheel drive is designed to run at 2 different speeds at the axles,otherwise youd toast it on a twisty road.see front wheels turn at an aggressive arc that causes the inner and outer tire to change rotating speeds very dramatically,the rear or following wheels use a much shorter abbreviated arc, and the difference in tire rotation is less pronounced.

texasedition

I see this a lot. It could do some damage. The diameter is close, just be careful, and I would get another tire asap.

Old_Skl_Raptr

only one tire drives at a time anyways so it wont matter. just dont put in any lockers or anythign. its just temporary right

harley9703

I ran 37's on the rear and 36's on the front, for over 4 months...

Didn't feel like buying tires when I had just maxed out my C.C. with a $2,000 limit for 3 tires @ 17 lol for my 49's

SultanGris

that wouldnt cause any problems, unless you use 4x4, **** some sportier cars come with different size tires in the front than in the rear.