Originally Posted by Skarrd
Got a 40t #25 gear in today for the pocket bike jackshaft.
6t-40t = ~6.67:1 reduction
10t-44t = 4.40:1
40t-28t = .70:1
final drive in 1st gear = 20.53:1
should work out for some nice gearing.
Interesting combination...pb engine, midframed w/shift kit.
What gears are you running? 7/8-speed cassette? 3-speed internal hub?
FWIW, my gear ratio in 1st gear is 46.32:1. It's like a granny gear for climbing steep hills, and 8th gear is highway gear @ 15:1.
Your 1st gear is 20.53:1.
My 6th gear is 20.45:1, and I'm @ 30-something mph in that gear.
You might want lower gear ratios.