How do you carry a spare tire?

I had two blow last summer. 1 had 27k miles on it and was 9 months old. Got a new one under warranty. That new tire blew the next day, it was also warranted. It's possible I picked up a screw and they leaked down while in transit, however that is so unlikely to happen two days in a row that I believe they was defective from the factory and I was the unlucky sob that got them.

 

You would think the taller tire would take the load and wear at a faster rate, but I have seen the smaller one wear right down to the air in a pretty short order, several times.
It is much easier on all components to run matched tires, cheaper in the long haul by far.

 

Was these caps or virgins?

 

Those were caps. But I've had virgins blow as well in the past.

 

That cannot be true. If it were true, then rolling with just one dual single tire would result in a bald tire. It doesn’t happen. I’ve driven with one dual single tire for over 200 miles, yet there was no damage on the inflated tire.

The tire tech who showed me the completely bald tire said that it only took about 100 miles to do that kind of damage. Who knows how much tire tread difference there was.

 

I was just curious that's why I asked. How many times over your driving career Spyder has it happen 2 you? I've gotten a couple nails in drives but never had one blow and put me roadside... Only 1 steer blowout and a few trailer tires 4 me.

 

I'll trust my own experience with mismatched tires over the last 25 years of operating trucks rather than believe high school drop out working as a tire tech at a truck stop that's never even driven a large vehicle knows what he is taking about and isn't just repeating what he was told by his boss in order to sell more tires.

The reason the one with more tread will wear faster is because it has a larger circumference therefore taller. that causes it to carry more weight and to compress to match the height of the worn tire when loaded up. So instead of traveling say 150 inches per revolution its being forced to only travel 140.
Now if you ran very light loads the opposite would be true, the worn tire would be drug to match the distance travelled of the new tire. At least in theory on paper.

Im no scientist but I've ran plenty of mismatched tires over two and a half decades. And my observation from personal first hand experience of that 2.5 decades shows me the worn out spare that's only got any tread at all be is because I regrooved it hangs in there a long ### time while the deep tread relatively new tire beside it wears at an accelerated rate.

 

Oh im only on the side of the road long enough to cut the rubber away then im driving to a place to get it fixed. I've had 3 steers force me to sit for a service truck. And one of those was at jobsite due to a piece of sharp angle iron hidden in the mud. A drive or trailer I will pull up on a block and peel the tire off if an outside or cut it off if an inside to get on down the road to a truck stop or rest area to change it myself if need be.

 

Sorry, man. You’re mistaken. As I already pointed out earlier, driving one dual single by itself will not result in a bald tire. We have plenty of drivers here on this forum to definitely prove that an overloaded dual single next to a flat dual single will not result in a bald tire. What is true, however, is that tires that carry more weight will wear out faster—in the long run and not in one day.

This article explains why the shorter tire will wear out much faster.

Mismatched Duals

 

Next time you have a blow out stick a spare on that's got less tread than the good tire beside it and get back to me. Your assertion that a spare with less tread will be bald in 100 miles is hogwash.