Gearing for Speed!
Back to Tech List

HPD-763-389-3336

Trans Ratio 22-40 = 1.82 to 1 = 4055 RPM
14-38 = 2.7 to 1 = 1502 RPM
15-39 = 2.6 to 1 = 1560 RPM
15-36 = 2.4 to 1 = 1690 RPM
15-34 = 2.27 to 1 = 1786 RPM

Rear Chain Ratio
/Circumfrence ..............14/38.........15/39...........15/36...............15/34

18" Tires = 57.0"................81 mph............84 mph.............91 mph...............96 mph

20" Tires = 63.0"................90 mph............93 mph............101 mph.............106 mph

" Tires = 69.5"....................98 mph............102 mph...........111 mph.............118 mph

22.4" Tires = 70.0"............99 mph.............103 mph...........112 mph............119 mph

23.3" Tires = 73.0"............103 mph...........108 mph...........117 mph............123 mph.

24" Tires = 75.4"...............107 mph...........111 mph............121 mph...........127 mph

25" Tires = 78.5" ..............111 mph...........116 mph............125 mph...........132 mph