Originally Posted by joe in calif
snip.......Should I be thinking about changing them? I know car and motorcycles tires are good for about 6 years.
I have heard the same thing, about 5-6 years tires should be looked at very closely, but in many cases recommended to be replaced do to age. My brother tells me that in Florida he changes his tires more often (3-4 years) because of heat and sunlight issues, but I don't know if that is a rule of thumb in the southern states. I have heard that tires just sitting (under load) and getting very little use for long periods of time may compromise longevity.
My '05' Eagle has the original '04' dated Maxxis tires "C" rated tires on them and one tire this camping season is showing signs of sidewall cracking, so I plan to install a new set of Maxxis "D" rated tires first thing next spring (when I take it out of winter storage). My TT tires have worn extremely well and I have always protected them from the sunlight when in storage, and my TT has a lot of highway miles on it.
A little off topic, but I just put a new set of tires on my 2002 GM TV replacing the original
LT tires. I use my TV only for towing so the tires had 52,000 miles on them but were 9 years old. I experienced tread separation (I'm sure an age related root cause) on one tire this summer thus I replaced all of them...., was planning to replace them this fall anyways.
IMO, if your '07' dated TT tires are in great condition, I would at least go another season and give them another good inspection. Maintaining the proper air pressure helps with tire life as well.