I got this second hand road bike a month ago, everything was fine until I went on a 15 mile ride - somewhere around the tenth mile I started to experience a clicking sensation as I was pedalling. I didn't do anything about it as I thought it wasn't too serious but three days afterwards the chain broke. I just got a new chain fitted in, the clicking is still there. What do you think could be the issue, perhaps worn out cassette?
Cheers
Cheers