Hello to all and thanks for your comments. This is my first bike and I have a question about the chain and sprockets. There is no adjustment left in the chain tensioner and the chain is very loose. The chain taps on the bike stand when I ride it in the backyard. I do know that I need to replace the chain. It looks poorly taken care of. Its a 630 type chain. I would like to know if the sprocket still looks ok to you guys? I've read on other posts that if replacing the chain you should replace both sprockets also. I've also read about doing a 630 to 530 conversion. I'd like some input from you guys about my options. Should I just replace the chain? Or replace chain and both sprockets? Or do the 630 to 530 conversion? Thanks to all.