I had over 55,000 miles on my 2004 3400RL with the Tacoma Tires that still looked brand new after 8 years. Tread life was still over half and the tires had no signs of aging or cracking. I contribute the life and performance of my previous tires to air pressure and my keeping them covered anytime the coach was parked for more than two days. I keep my new tires covered as well. Cost of tire covers was $38 per side -- cheap insurance in my opinion.
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