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6-27
AXLES
phone: 1-800-854-3140 | 1-503-304-8899 fax: 1-800-366-7505 | 1-503-304-1899
www.jjamusements.com
DRIVE SPROCKET SPREADSHEET
**Lower “driven” sprocket for chart is 80 tooth.
**Tire size is a standard 12 x 4.00 - 5” Bigfoot tire; 36.12
inches in diameter.
Drive sprocket
(engine mounted)
Driven sprocket
(axle mounted)
Find a handy speed calculator at http://www.jjamusements.
com/speed-check/
Drive sprocket (tooth)
RPM
Speed (mph)
Gear
ratio
18
3800
14.6
4.44
18 3900
15
4.44
18
4000
15.39
4.44
19
3800
15.43
4.21
19
3900
15.84
4.21
19
4000
16.24
4.21
20
3800
16.24
4
20
3900
16.67
4
20
4000
17.1
4
21
3800
17.05
3.8
21
3900
17.5
3.8
21
4000
17.95
3.8
22
3650
17.17
3.63
22
3800
17.87
3.63
22
3900
18.34
3.63
22
4000
18.81
3.63
FACTORY SETTING