_"I say this also as a continuation of the discussion about the cassette with a 39t "granny gear", but the other thing is, you can't just keep shrinking the chain ring indefinitely."_
Chainring size doesn't matter if you're on a high pivot idler bike.
I've got 152 cranks with a 30 chainring on a 29er for long climbs in Socal. No issues.
Oct. 23, 2023, 2 p.m. - roil
_"I say this also as a continuation of the discussion about the cassette with a 39t "granny gear", but the other thing is, you can't just keep shrinking the chain ring indefinitely."_ Chainring size doesn't matter if you're on a high pivot idler bike. I've got 152 cranks with a 30 chainring on a 29er for long climbs in Socal. No issues.