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is driving with a different sized spare dangerous/harmful

is driving with a different sized spare tire dangerous or harmful to my truck?

is driving with a different sized spare dangerous/harmful

Postby ChevySmiling [OP] » Jun 03 2012, 4:10am

well, i hit a pot hole, now theres this air bubble in the sidewall of my drivers side front tire. thankfully i have a warranty to get it replaced for free but, i wont be able to until a week from now. ive heard driving on it is very dangerous, could possibly blow out (is this true also? or should i be ok for a week driving less than 150 miles)... anyhow i figured putting the spare to drive around on for a week would be the smartest thing to do, the thing is i have after market 22" rims, and a 17" full sized spare(the one that came with the truck 07 silverado)
the tires on the truck are 285/40R22
and the spare is a P265/70R17
about 1inch difference in diameter, its only a 2wd drive.. is it ok/safe to drive around for a week on these different sized tires? will it harm my truck? anything i should look out for(not going on the freeway etc.)??? thank you for all your help and advice :D
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is driving with a different sized spare dangerous/harmful

Postby Machster69 » Jun 03 2012, 4:16am

Ide put rear tire on front and oddball the rears... Then at least ull steer straight, rear tires will wear lil funny like that but 150 miles wont hurt to bad...

Dont drive on that bubble...ide avoid high speeds

And make sure that spare is in good shape!
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Re: is driving with a different sized spare dangerous/harmfu

Postby rdss » Jun 03 2012, 4:40am

Keep in mind that you have a locking rear axle as well, if your axel locks it could cause a problem trying to spin two different sized tires in the rear.

Just went on tirerack.com aand your 285/45/22 tire is about 31" and your spare 265/70/17 is about 31.5", I honestly think that having a half inch difference on the front is really going to hurt anything on the front and shouldn't have to ill of an affect on your G80 axel. Do what you feel comfortable doing and get the tire replaced as soon as possible.
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Re: is driving with a different sized spare dangerous/harmfu

Postby deathphoenix99 » Jun 03 2012, 5:35am

With a locker in the rear, I'd put the spare in the front. On my old truck, I had a locker and a smaller spare as well, and I always had to put it in the front or it'd bind the locker a lot while driving.
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Re: is driving with a different sized spare dangerous/harmfu

Postby ooohhdave » Jun 03 2012, 5:40am

It's only 0.6 of an inch difference. Should be fine for a week as long as it's in the front.
Last edited by ooohhdave on Jun 03 2012, 5:58am, edited 2 times in total.
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Re: is driving with a different sized spare dangerous/harmfu

Postby deathphoenix99 » Jun 03 2012, 5:42am

and actually only about 1/4" difference since it's the radius of the tire that you need to look at, not the diameter.
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Re: is driving with a different sized spare dangerous/harmfu

Postby ASTE25 » Jun 03 2012, 6:08am

It will not cause any problems unless you are in 4X4 and on good traction ground. The differential will take care of any differences in tire speed.
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Re: is driving with a different sized spare dangerous/harmfu

Postby ChevySmiling [OP] » Jun 03 2012, 6:29am

awesome thank you all!!
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