similar gearing from 22s-20s

[fastmofo]

ok, my gearing right now is 13/39 on 22s, and i want to Move down to a 20" tire. and wondering what gearing would be similar to what i have now when i go to 20s? 12/39? thanks

[cals400ex]

it definately wouldn't be 12/39. it may be closer to 14/39 though.