I'm pretty sure the answer is yes but I want to ask. I installed a Shimano Tourney 46/30 crankset where I previously had a 42/52. By the way this area is very hilly and it's a 30 lbs gravel bike so I couldn't see myself continuing with a minimum 42T chainring. Anyway, do you think I'll need to have the chain shortened? (I can do some things myself but don't have the tools for that one.)