I am buying a new chainset for a Trek 830, and am trying to pick between a few in the Shimano range. These are;
Alivio MC20 ---(£25)
Deore M510 ---(£50)
Ideally I would like to keep my original bottom bracket, which I believe is 113mm in length, although I have been advised that a new CS might stick out too far - is this likely? Im fitting a new 7sp cass/8sp chain so would these CSes be compatible?
The rest of the bike will remain original - so is it worth spending more on a better chainset like the M510 - is there much performance difference between them? I plan to replace the bike in a year or two.
Advice on what to go for would be really appreciated!