God some of you people dont know anything! Ken even dropped the numbers in the tool box calculator for y'all. 18x38 is a nice ratio with 12 inch tires, 45mph is just under 9k.
Ryan, you have obviously never fucked with a puch with a stock gears. So get the fuck out of this thread with you express anecdotes. 17x45 is a ratio you can hit +55 on.