[dcb]

dunno, maybe 2:3 or 1:2? It should be easy enough to try different combos of sprockets and find something that works the best, depends on taste to some degree I'm sure.

But if it takes, say 18 seconds to reach 60mph with a single gear, an additional lower gear that is 2:3 the ratio should be able to top out at 40mph and give 50% better acceleration up to 40mph, which would ideally knock 4 seconds off the 0-60 time, maybe.

a low gear that is 1:2 the ratio would top out at 30mph and knock off maybe 4.5 seconds, kinda sorta.