17/41 for the bikes I re rimmed sportin' 6 x 200mm x 16" tires and 19/44 for the stock rears, unless I am being dyslexic again as I didn't go look under the sprocket covers. I would have never even bothered with sprocket tom foolery, but when I mounted that first phat tire on, the bike wanted to idle in 1st gear at about 18 MPH, which was too fast for parking lots to me, anyway.