OK, long cobbled story short....I'm thinking of chainrings....
at the moment I have 53/39 and I just wondered what the range of change rings I could change to without messing about with chains/derailers etc? (I *think* changing can mean changing derailers or chain length?)
or alternatively, changing cassettes to give me a bit more/less dependent on where/what I'm riding? It's not a permanent thing but rather I'm thinking about adaptability dependent on what I'm riding? Ideally, I need 2 bikes but that's just not and option so a cheaper option is to explore the range of changes I can make.
Jon e? Jack?