Are these rings worn out?
Are these worn out?
Just realised how bad the pic of the cassette is. Is there a sure fire way of telling if sprockets / rings need replacing?
I'm riding without a front mech at the moment, with the chain on the big ring, and its thrown it off a couple of times, and thrown it onto the small ring once.
The bike must have done at least 2500 miles, maybe quite a few more.