#1 Sidewall damage? Can this be repaired? I usually toss the tire figuring if the sidewall is compromised, it just isn't worth taking the risk of total tire failure. Is this correct thinking or can the tire be repaired?
#2 Tread wear? How much tread wear do you usually put up with before tossing the tire. I have a old tire and new tire of the same type. The old tire is missing a significant tread comparing to the new tire but there is still some tread remaining. Would you change it or keep riding on it?