Dahon folding. Going all out. Advice on double chainring.
Made up my mind. Bought a vybe D7 a couple of years ago. Modified to a killer 11sp. Currently sporting a Single 52t front chainring. Going to move to a double. Decided on doing a 56t/40t 130BCD 170mm configuration. #1. will my shifting be horrid with the tooth jump? #2. Large chainring diameter on 56t-should I just stick to 53/39 standard and play it “safe?” And of course, I’ve only got 20” wheels.