A tires salesman says that my sawtooth tires, which look like this
are the result of failed suspension. That makes no sense to me. Why would failed shock absorbers wear the tires this way?
These are relatively young tires (4 years since manufacturing, 3 years since install) with 50,000km on them. Unfortunately, they show unusual signs of early aging
and so they need replacing anyway, but I'd like to solve any possible cause for the sawtoothing before replacing the tires.
In case your experience with this type of tire would help, these are Firestone Champion HR tires. The Firestone brand supposedly has a storied heritage, but with my experience I can safely say that any such heritage is strictly in the past.
I'm looking for a mechanical (physical) explanation for the reason why any part of the suspension could result in sawtooth tires. Whether I'm doing 35mph/50kph inside the city or 65mph/110kph outside, the tires are rotating at a rapid rpm. It's a huge puzzle how suspension could result in this kind of wear. How would you explain it?