I'm trying to upgrade my cassette on a (commuter road bike) bike that uses a Shimano rear DX derailleur from ca 1990. What would the maximum tooth count be for this RD?
The model says rd-m650 but I'm not sure if it is the SS or SGS version? How can one tell?
It doesn't look like a short cage to my eyes but it's easy to trick ones eyes.
From what I found the it would be either 28T or 32T maximum. Do you think that a 34T would work? I understand that the extremes (smallest-smallest or biggest-biggest) won't work, but I don't use these gears anyways.