Have you seen the price of chainsets? You're suggesting new cranks and rings and a new cassette, when for under £50 inc. p&p he could get a Deore RD and HG50 11-34 cassette
Just the chainrings, which I've no idea about how much they cost as I don't tend to buy much new/modern parts.
Just the chainrings, which I've no idea about how much they cost as I don't tend to buy much new/modern parts.