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Thanks, but why would I change the crank length? I know that different crank lengths influence the gain ratio, but as I don't want to change the crank, I don't see where that's relevant?
I'm using Sheldons calculator which should factor in the crank length.
I'm at 72" at the moment, and would get to 69" or 66" with 44t or 42t chainrings respectively, or 64" with a 19t cog.
All with 165mm cranks.
Murphy's_Law-
Just stick on 48x19, it's been everyone's winter gear for the past 70 years. I wouldn't use a 44t all winter again, big rings just feel nicer.
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Thanks, but why would I change the crank length?
I'm not suggesting that, I'm just pointing out that you're making 2" difference into a bigger deal than it is, at least in terms of a gear ratio for general winter riding.
Sheldon's gear inch calculator ignores crank length, you need to be using his gain ratio calculation to include that.
umop3pisdn
gbj_tester
64" with 165mm cranks is less than 0.1% difference in gain ratio compared with 66" and 170mm.