I have a 2006 Bianch Axis which I use for commuting and I have now covered 6000 miles on it. Its getting to the point where I need to start to think about replacing the drivetrain as the teeth on the crank are looking very worn now and the rear derailleur (XT) seems to have trouble holding gears no matter how it is adjusted, so its probably tired. The rims have worn down to their wear grooves.
Its been a great bike solidly taking to and from work through the worst of British weather and I cannot fault it, the commute is half on road and half off road along a hard packed track.
It would be a good time to upgrade I think, the bike is pretty much stock except for mudguards and a stand.
The question is.... Is the Axis frame long lived enough to be worth considerably upgrading the parts. I am thinking of Ultegra drivetrain with a Hope external BB and a set of Mavic Open Pros. This comes to around £695. Having looked at Ultegra equipped bikes they are all around £1500-£2000 so I think it probably is worth it.