Originally Posted by
OntheRun.
You already put 2000 miles on them, and they're $20-25 a tire...I would just replace them and not have to worry about it.
This. If you've got 2000 miles out of a $20 tyre you've paid $0.01 per mile.
I tried to squeeze maximum possible value out of a Schwalbe Durano Plus tyre that had lots of the blue strip showing. It didn't end well. Luckily when the tyre failed catastrophically I only had a couple of miles to walk home, and wasn't on a fast descent or anything. I won't be doing that again...