Nothing, but you aren't riding it much by your own admission. I just thought you might want to ride more if you really liked your bike, which you obviously don't.

If you're a very casual rider, you dabble once every few years or so. If that sounds like you, then I agree you probably already have the right bike. But if you'd like to really enjoy riding on pavement, then get a bike that is lighter, has precise handling, and will roll more smoothly than your old Diamondback.

No offence to Diamondback meant, they make all sorts of good and exceptionally good bikes.