I'm still running 8 speed, so what do I know, but, I switched out the 39 for a 42, so I have 53 42 up front and run a 12-23 rear. Seems to cope with the Derbyshire dales just fine.
@gizmond started
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I'm still running 8 speed, so what do I know, but, I switched out the 39 for a 42, so I have 53 42 up front and run a 12-23 rear. Seems to cope with the Derbyshire dales just fine.