I already paid a shop (on their recommendation, because they said my old one would 'give out soon') to do that! Bet the old one would still be going fine if they had left it alone
@Nick: Tyre quality is a lot more important than tyre width. 235 shitty Chinese tyres will still suck, so will 255, 275, etc.
But a good quality tyre the same width will provide a lot more grip
I slept through two alarms this morning, managed to get to work only half an hour late though.
Really don't want to be here though, and half falling asleep at my desk