Apols for ROAD related question, but one of you guys will be bound to know...
When using a 9 speed cassette with a triple front set-up, what's the max size rear cog I can realistically use with a short cage rear mech... 27, 28, 29? My smallest cog is likely to be a 12 and the front rings are 30-39-50 (so 20 difference up front).
Is there a rule of thumb? Is it the difference between 9th and 1st that is key? Or the difference between 'big to big' and 'small to small'?
When using a 9 speed cassette with a triple front set-up, what's the max size rear cog I can realistically use with a short cage rear mech... 27, 28, 29? My smallest cog is likely to be a 12 and the front rings are 30-39-50 (so 20 difference up front).
Is there a rule of thumb? Is it the difference between 9th and 1st that is key? Or the difference between 'big to big' and 'small to small'?
