Originally Posted by Duragrouch

REALLY good explanations.



Interesting. So, I always look at gearing via gear-inches, because I know my needs there, and I'm always on the same crank length. However, IIRC(?), gain-ratio takes crank arm length into account, I think this was a favorite of Sheldon Brown and it's an option on their gear-calc page. Since you run different arm lengths, do you ever use gain-ratio? Or just pure on-bike testing?