Spare Tire question.

[ctluba]

Based upon info I gathered I plan to travel 0 miles at 0 miles per hour. I was told it would not be a good idea at all and would cause damage. I will just mount the larger spare. If I get a flat before then I call tow!!!!!

[wpage]

That correct. If you didn't your rig would be unbalanced and could be damaged dependent on variables.

[Texas Red]

Interesting. I was wondering the same thing if I go to 285's on my next set of tires.

[Dave92270]

that is interesting... Maybe my Hummer dealer is dumb, but when I was ordering my 285's (33") from them while ago, they suggested to keep the 265 (32") as a spare. I rejected the idea and got all 5 the same size, however I noticed the dealer actually sells some of their H3s with non-matching/smaller tire as a spare. I saw at least one H3 on the lot with four 285's mounted and 265 spare.

My guess is that slightly smaller (let say 1" difference?) spare is OK as long as one doesn't have to drive too far or for extended period of time?

[Viet Nam Vette]

I kwow that on a Corvette, it's a bad idea to mout a smaller diameter tire on the rear as a spare, as the Vette has a positraction rear axle. It would cause the the posi clutches to activate in the rear and burn them out while traveling in a straight line since one tire's outside diameter is smaller then the other.

In other words, the rear diff would think it's turning a corner. Now.if the H3's diff has posi clutches..it's a No-No..!! Not sure if the 3's diff's are posi..??

Are they..???

[Texas Red]

What about all those cars that come with a compact size spares? If I remember, they have a qualifier -- like "45 mph and 50 miles." I'm having trouble seeing how a 1" smaller diameter spare could be a problem if only used "sparingly". LOL.

[Viet Nam Vette]

Originally Posted by Texas Red

What about all those cars that come with a compact size spares? If I remember, they have a qualifier -- like "45 mph and 50 miles." I'm having trouble seeing how a 1" smaller diameter spare could be a problem if only used "sparingly". LOL.

I think those are still the same outside diameter as the oiginal tire...just thinner.

[RubHer Yellow Ducky]

Originally Posted by Texas Red

What about all those cars that come with a compact size spares? If I remember, they have a qualifier -- like "45 mph and 50 miles." I'm having trouble seeing how a 1" smaller diameter spare could be a problem if only used "sparingly". LOL.

you right, if its just for an emergency use the 265 till you can get the tire that went flat repaired. You just don't want to go hundreds of miles on the 2 different sizes...

[TXSUT]

Originally Posted by Viet Nam Vette

I kwow that on a Corvette...has a positraction rear axle.

Wrong there, too. Corvettes come standard with a limited-slip differential.

Don't think I've ever seen so much misinformation in one thread.

[Viet Nam Vette]

Originally Posted by TXSUT

Wrong there, too. Corvettes come standard with a limited-slip differential.

Don't think I've ever seen so much misinformation in one thread.

Wrong.. I own a 65 Corvette with a ZZ502 BB with Posi. Go on any Corvette forum and mention using a smaller diameter tire on one side on the rear with a Posi axle and see what kind of reaction you get.

And for your information .."Limited Slip" And "Posi Traction" are the same thing.

If you know how a posi works then you know that when one wheel slips, it slips against the internal posi clutches when traveling in a straight line. If you use a smaller diameter rear tire on a Corvette on one side of the rear, the clutches will slip all the time and burn up. Both wheels have to turn at the same speed to prevent the posi from engauging.



That's not missinformation ..But Fact


Don't think I've seen so much miss information from you.