SUBJECT: # 27870: Good tires going bad

Submitted by RNuts (208.66.60.203) from ALABAMA on 1/10/2008 9:55:00 AM

I have four Carlisle 225 75 15 8 ply tires that are about 4 years old. The tread still looks new. But one by one they are spliting open from the inside out. Luckely this has happened while sitting in the yard and not on the road.

Are there any precautions that I can take to prevent this from happening? And why is this happening?

Thanks for your replys.......

1. 1/10/2008 11:59:00 AM Submitted by RNuts (208.66.60.203) from AL says Just realized there is a trailer page. I will repost there.
   Thanks

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2. 1/11/2008 6:39:00 AM Submitted by Clerndon (69.253.195.61) from NJ says I'd sure like to
   Hear the reason for this happening.

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3. 1/11/2008 8:51:00 PM Submitted by Warren R (209.240.207.74) from CA says Answer for Clerndon (Long)
   Factors that cause tire wear-and-tear The primary reasons for RV tire deterioration include the following: Ozone and UV exposure. Over time, RV tires are exposed to a great deal of UV rays and ozone poisoning. This can lead to cracks in the rubber, especially in a tire's sidewall. Though a tire's exterior may look just fine at first glance, further inspection may reveal small cracks on and within aging sidewalls that worsen with time. Improper tire inflation. Under- and over-inflation can both lead to blowouts. To help prevent this, check the inflation pressure or your tires at least once a month, and always before starting a trip. Do this when tires are cold, as heat generated during driving temporarily increases air pressure. Never remove air from a hot tire, which may result in under-inflation when the tire cools. Excessive load weight and uneven weight distribution. Tires frequently subjected to maximum loads will wear faster, while tires that carry loads below their rated capacity can be expected to last longer. Be sure to load your RV evenly. Uneven load distribution leads to uneven tire wear. Tire construction. Tires of different constructions, such as radial and bias ply, as well as different sizes and stages of wear, can harm vehicle handling and stability. Use the same size and type of tire on all wheel positions. All RVs built since 1972 have a certification label that contains the following important information: - Gross axle weight ratings (GAWR) for each axle on the RV - Tire size - Recommended cold tire inflation pressure Tire Care Tips The most important thing you can do to extend the life of your tires is to inspect them regularly. The following tips will also help: Regularly wash tires with a mild soap, water and a soft brush. This will help to remove accumulated ozone damage. Also, dirt on tire sidewalls may act as an abrasive that can inhibit the tire's natural wax protection. Rotate your RV tires (including your spare) regularly to maintain even wear. Keep the tires (including spare) covered when your RV is not in use to prevent ozone and UV damage. Block and level your RV each time you plan to keep it in one place for a couple of days or longer. This will help avoid unnecessary stresses that lead to excessive tire wear. Avoid tire products that contain petroleum-based substances. Products containing alcohol or petrochemicals may create and accelerate deterioration and cracking, in addition to stripping the tire of its ozone protection. Some silicone oils found in such products may cause similar damage. Editor's Note: This article was contributed by the Insurance Service Center, representing the Foremost Insurance Group of Company  

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