Really? I was wondering about that. There's not much tread left on 'em, but at least they're not in danger of exploding from dry rot (as I've had happen before). And as of this AM, they're still holding air!
Yesterday I fixed the rear rack (wasn't properly mounted), secured the rear fender better, straightened the front forks a little bit and then rode it all over town. Fun fun.
But singlespeeds sure are silly. I haven't had one since I was a kid. You have to stand up to power up hills or accelerate quickly, and then it's geared too low to go really fast downhill.
Listen to me complaining about my free classic cruiser.
I love it.