My question is I have S637 tires that are 12/15 dated with lots of tread so what’s the usual life span on these tires? Also they list 110psi on the sidewall and I’m running 80psi. Should I air them ...
If there are no visible signs of wear or damage, don't fix what ain't broke. 3ys isn't excessive by any stretch, so is unlikely to impact resale value.