Originally Posted by talest
Originally Posted by tomcat27
the update MIGHT be a reformulation of the "rubber" compound to stop the dry rot cracking. they have changed a couple of their tires already to stop that issue
Will not any tire crack when dry rotted
It's a little more complicated than that.
Some types of rubber aren't prone to cracking. As a general rule, those aren't suitable for general use in a tire
- BUT -
There are locations in a tire where those types of rubber can work and the sidewall is one of them. That means that using sidewall cracking as an indicator of the state of the rubber is somewhat unreliable.
So the general rule is that if a tire DOES have excessive cracking in the sidewall, then it should be replaced. And if a tire does NOT have cracking in the sidewall, go by the manufacture date (or date of purchase. if you know it.)
Put another way, no cracking is NOT an indicator that things are OK!