Without wanting to get into sheldon brown's calculator shenanigans. Could someone explain to a newbie what a decent ratio would be. I have a Sprocket (rear) 18 T and I'm thinking of getting a 46 T 170mm chain wheel set. Wheels are 27 x 1 1/4.
Majority of terrain will be flat with the exception of two low gradient hills. Just want it for cruising really, not racing etc.
Any help (not sarcasm) would be greatly appreciated.