Hi guys, I've only had my bike for about a fortnight, and have been reading as much as possible on the maintenance side of things from this site. I'm pretty handy mechanically with cars, so I'm trying to learn as much about bikes too Heard a strange noise from the bike a couple of days ago, it sounded like the chain, and sure enough, it was! After some reading, I had a go at adjusting it tighter, took it out for a half hour test ride, and when I came back, she was as loose as when I started! So I adjusted her again, and now she's about the right tightness, but there was still a graunching chainy kind of noise. Took the cover plate off the front sprocket, and found this: A small (~2cm long) bit of rubber came off with the cover plate, and there are obviously other bits missing. I'm assuming this is some kind of a harmonic dampening rubber on the outside of the sprocket. So the question is, does this mean my front sprocket (and chain too) is borked? Where can people recommend in Sydney (I live in Balmain) to get new sprockets and a chain put on? Or, if someone can tell me where to buy the bits, can someone mechanically savvy (and who has a chain breaker) come give me a hand and show me how to replace it myself? I'm willing to pay in beer, scotch, etc... What sort of price should I expect to pay either for the bits or to have it professionally done?