20/30/40 and T/C/S Calculator

1 to 1
1.047
1.083
1.125
1.150
1.174
1.192
1.217
1.231
1.263
1.280
1.300
1.318
1.350
1.389
1.421
1.474
1.529
1.632
1.777
 
RATIO NO. TEETH Transmission
RATIO IS
1 TO 1 25 51
25 51
1.047 21 99
22 100
1.083 24 97
26 98
1.125 24 95 Only Available for 20 Series, 20 Mini Rod, and 30 Series
27 96
1.150 20 93
23 94
1.174 23 91 Only Available for 20 Series, and 30 Series
27 92
1.192 26 89 Only Available for 20 Series
31 90
1.217 23 87
28 88
1.231 26 85 Only Available for 20 Series
32 86
1.263 19 83
24 84
1.280 25 81 Only Available for 20 Series
32 82
1.300 20 264
26 265
1.318 22 79
29 80
1.350 20 266
27 267
1.389 18 119
25 120
1.421 19 133
27 134
1.474 19 135
28 136
1.529 17 123
26 124
1.632 19 125
31 126
1.777 18 127
32 128
 

TO CALCULATE OVERALL GEAR RATIO
4 Wheel
 SCS
Shiftable or
Rear Axle x Transfer x Head Set x Quick Change
Example: 6.20 x 2.00 x 1.389 x 1.389 = 23.92
Rear Axle: Transfer: Head Set: Quick Change: Total:


2 Wheel SCS SCS
Planetary Head Set or Quick
Ratio x Rear End x Shiftable x Change
Example: 3.6 x 5.29 x 1.083 x 1.047 = 21.59
under under
Ratio: Rear End: Shiftable: Change: Total:


NOTE: If any gear is in Overdrive
divide by Overdrive last
Example: 3.6 x 5.29 x 1.083 divided by 1.047 = 19.69
under over
Total: