Posted by Mark on September 22, 1998 at 10:45:15:
In Reply to: Replacing a cracking SR 19.5, 12 ply R.V. tire, Michelin, Dunlop and Bridgestone under consideration -> posted by Rod on September 19, 1998 at 23:28:38:
Sidewall cracking, I am assuming of the ozone variety, is due to weather exposure and aging. You did not mention the age of the tires, but if they are 4 or 5 years old, this is probably normal. I don't think I have ever seen a worn out tire on a motor home - ozone cracking is probably the most common removal reason. As for replacing with a higher ply rating, this will be of little value unless you need the extra capacity. The higher ply rated tire will likely suffer the same exposure related damage.
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