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Same gear for a 50 as a 25?
Maybe. If you're going to do the old-school 50 time of twice your 25 plus 5min, then the slight cadence drop ends up being about right given the longer duration.
gbj_tester-
I've tried out the shorter cranks on a couple of hills where I start to get a bit ragged on 170mm and I was much more in control.
OTOH the extra Q was also noticeable: usually I can keep the bike solidly upright, whereas it was noticeably rocking when I was pushing and consequently more twitchy.
So I think if I gear conservatively, I'll gain from being able to keep he bike straight at a higher cadence.
Scilly.Suffolk
Same gear for a 50 as a 25?