I'm off to the Alps for a few days and have managed to find room in the car for my bike. Whilst I'm there I fancy trying a few climbs, probably Col De Joux Plane and Col de la ramaz.
At the moment I go down as far as 39x25. Is it worth trying to dig up a 27 sprocket from somewhere? Currently I ride mostly round the Chilterns so do steep but not long climbs, only usually hit the 25 sprocket above 20% incline. Long local climbs I can manage seated in 39x21 but there's no not many above 5-10 minutes.
At the moment I go down as far as 39x25. Is it worth trying to dig up a 27 sprocket from somewhere? Currently I ride mostly round the Chilterns so do steep but not long climbs, only usually hit the 25 sprocket above 20% incline. Long local climbs I can manage seated in 39x21 but there's no not many above 5-10 minutes.