So I've heard
Three speeds should be adequate for casual city cycling for most people. The reduction in weight (~1 kilo) and maintenance of losing the rear cluster, derailleur and cables make it attractive to me. If 34/12 is too high a gear on a 12 kilo bike my next option is going to a 22/12 for the low. That makes the range waaaay wide with 48/34/22! How much chain takeup will I need with these chainring steps?