Is 3000 a good distance before needing to replace a tyre?
I haven't had a puncture for quite a time now, but I did have to change the rear tyre a couple of weeks ago after I noticed a large piece of the rubber flapping about
The front is is still in pretty good nick though.
I agree that you really can't avoid every little piece of grit and often find tiny sharp stones in my tyres despite my best efforts to steer clear. It's the rear that suffers the most - why is that? Is it due to the extra weight it has to support or simply because you can quickly steer the front away from trouble, but it's not so easy with the rear?