Centurion Pro Tour crank length question
I am slowly building up a 77 Centurion Pro Tour and I am looking for a crankset. I think I'm going to stick with a vintage Sugino double or triple, but I'm wondering what length I should go for. The frame is a 57 and my inseam is roughly 31.5. My one bike that is 56 with 73/73 has a 165. My 21" Schwinn Voyageur also has 165. I'm curious does the slightly larger frame necessitate a slightly longer crank arm length? I believe the Centurion is 73/73 with a 54 top tube. Thanks.