RV有个不成文的铁律: 不论轮胎跑了多少迈, 到第8个年头一定要换(有人买了我们退下来的轮胎用到dump truck或local 跑的heavy truck上).
我自己更进一步: 每4年我把前轮(2) 转到左后轮(dual wheel), 前面换成新轮胎. 这样在任何时刻,我的前轮一定是4年或更少的年岁.
RV Blows Tire Causing Roll-Over
a front tire blowout caused the rv to swerve off i95 and landed upside down in water
http://wric.com/2017/04/11/2-injured-after-rv-runs-off-i-95-in-prince-george-co/