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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / December 2005How long do tires last when kept away from sunlight & ozone?
I have some mini spares that have been treated annually with rubber preservative and kept in the garage in sealed plastic bags since they were new. How old can they get in this condition before they become unsafe to use? > I have some mini spares that have been treated annually with rubber > preservative and kept in the garage in sealed plastic bags since they > were new. How old can they get in this condition before they become > unsafe to use? I regard them as unsafe to use from day one. Protection from light does help some, but mostly in terms of premature aging. Standards are on the way for the maximum age at which a tire can be sold. In Europe I thought they were talking about seven years. You can easily check this. So I'd say seven years and you are on your own, maybe ten at the outside. When and if a person ever must resort to a mini they should drive extra carefully and expect handling problems. It should be strictly for emergencies. It's no coincidence that I see mini spares for free or $1 at garage sales regularly. > > I have some mini spares that have been treated annually with rubber > > preservative and kept in the garage in sealed plastic bags since they > > were new. > I regard them as unsafe to use from day one. I expected somebody to say that, not that I like them either (why they're in the garage rather than in my cars). > I have some mini spares that have been treated annually with rubber > preservative and kept in the garage in sealed plastic bags since they > were new. How old can they get in this condition before they become > unsafe to use? IMO, 10 years absolute max. If they were mine, and I really wanted to keep them, I would double bag and then replace the air in the tires and in the bags with argon. =?x-user-defined?Q?=AB?= Paul =?x-user-defined?Q?=BB?= <Houston, Texas, USA> wrote: >> I have some mini spares that have been treated annually with rubber >> preservative and kept in the garage in sealed plastic bags since they [quoted text clipped - 4 lines] >keep them, I would double bag and then replace the air in the tires >and in the bags with argon. My take on this is that mini spares are unsafe to use even if they are brand new and have no degradation at all. --scott  Signature"C'est un Nagra. C'est suisse, et tres, tres precis." That was my take, why in the world would anyone with a brain want a "stash" of mini spares???? > That was my take, why in the world would anyone with a brain want a > "stash" of mini spares???? Collector's items for antique cars in 30 years? > That was my take, why in the world would anyone with a brain want a > "stash" of mini spares???? I never got around to selling them, and I put one in the trunk when I have to drive from Phoenix to Tucson (two spares, the other a full size). >My take on this is that mini spares are unsafe to use even if they are >brand new and have no degradation at all. If you keep them properly inflated and keep your speeds under the limit of the spare, they work ok. Most people don't check the tire pressure on these, so when they need to use them, they are usually dangerous because they are underinflated. --------------- Alex > I have some mini spares that have been treated annually with rubber > preservative and kept in the garage in sealed plastic bags since they > were new. How old can they get in this condition before they become > unsafe to use? Trick question. Mini spares *start out* unsafe to use. > I have some mini spares that have been treated annually with rubber > preservative and kept in the garage in sealed plastic bags since they > were new. How old can they get in this condition before they become > unsafe to use? Rather than relying on guesses my recommendation would be to call the manufacturer of the tire. And then rely on their recommendation. Are you looking to resell them possibly? If so the resale market isn't particularly good. I had to use mine on a 15 year old Protege when I picked up a nail. It was stored in the spare well in the trunk, no preservative or Rosary beads in all that time and it was indifferently inflated. I inflated it to spec, mounted it on the car then drove 20 miles to work and back with no problems. This car lives in Dallas and Houston so it sees a lot of heat in the trunk. |
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