Gear Ratio Chart/Pinion Gear Selection - Evader ST/BX With 85T Spur
Internal Gear Ratio 2.66
  Off-Road Tires Street Tires Foam Tires * Off-road calcs = Gladiator II tires w/ 4.25" diameter
Roll-out 13.35176878 10.99557429 9.424777961 * Street calcs = Street Hawg II or Road Hawg II tires w/ 3.5" diameter
* Foam calcs = Generic foam tires w/ 3.0" diameter
Final Drive Ratios
Pinion FDR (*:1) Pinion FDR (*:1)
15 15.07333333 21 10.76666667     FDR Starting Point Pinion
16 14.13125 22 10.27727273 Novak Velociti 6.5R 12.2-12.7:1 18-19**
17 13.3 23 9.830434783 Noval SS5800 12.3:1 18-19**
18 12.85666667 24 9.420833333 Novak SS4300 12.5:1 18-19**
19 11.9 25 9.044 **These are Novak's recommendations based on FDR
20 11.305 26 8.696153846
Efficiency Ratio1 1 Closest to 0.0 is ideal
Pinion FDR:RO - Off-Road Pinion FDR:RO - Street Pinion FDR:RO - Foam   - Positive numbers reflect overgearing
15 -1.721564556 15 -4.077759046 15 -5.648555373   - Negative numbers reflect undergearing
16 -0.779481222 16 -3.135675712 16 -4.706472039
17 0.051768778 17 -2.304425712 17 -3.875222039
18 0.495102111 18 -1.861092379 18 -3.431888706
19 1.451768778 19 -0.904425712 19 -2.475222039
20 2.046768778 20 -0.309425712 20 -1.880222039
21 2.585102111 21 0.228907621 21 -1.341888706
22 3.07449605 22 0.71830156 22 -0.852494767
23 3.521333995 23 1.165139505 23 -0.405656822
24 3.930935444 24 1.574740954 24 0.003944627
25 4.307768778 25 1.951574288 25 0.380777961
26 4.655614932 26 2.299420441 26 0.728624115
Projected Top Speed (MPH)
P2K2 Pro Trinity D6 LRP V10 Spec 4 Orion Method R Novak SS4300 Novak SS5800 Mamba Max 5700 Novak Velociti 6.5
6-cell 7-cell 6-cell 7-cell 6-cell 7-cell 6-cell 7-cell 6-cell 7-cell 6-cell 7-cell 6-cell 7-cell 6-cell
Off-Road (17T) 27.96068 32.6208 34.39187 40.12337 29.74221 34.69893 30.18332 35.21324 28.74783 33.53913 34.2236 39.92754 39.01491 45.51739 43.80621335
Street (20T) 27.08994 31.60493 33.32084 38.87386 28.81599 33.61834 29.24335 34.11663 27.85257 32.49466 33.15782 38.68412 37.79991 44.0999 42.44200602
Foam (24T) 27.86393 32.50792 34.27287 39.98454 29.6393 34.57887 30.07888 35.09139 28.64835 33.42308 34.10518 39.78938 38.87991 45.35989 43.65463476
** Trinity P2K2 Pro Stock 27T = 34,314 RPM @ 8.4V  29,412 RPM @ 7.2V (4,085 RPM/V)
** Trinity D6 12x2 = 42,206 RPM @ 8.4V  36,177 RPM @ 7.2V  (5,025 RPM/V)
** LRP V10 Spec 4 14x2 = 36,500 RPM @ 8.4V  31,286 RPM @ 7.2V  (4,345 RPM/V)
** Orion Method R 15x2 = 37,041 RPM @ 8.4V  31,750 RPM @ 7.2V  (4,410 RPM/V)
** Novak SS4300 = 35,280 RPM @ 8.4V  30,240 RPM @ 7.2V  (4,200 RPM/V)
** Novak SS5800 = 42,000 RPM @ 8.4V  36,000 RPM @ 7.2V  (5,000 RPM/V)
** Mamba Max 5700 = 47,880 RPM @ 8.4V  41,040 RPM @ 7.2V  (5,700 RPM/V)
** Novak Velociti 6.5 = 46,080 RPM @ 7.2V  (6,400 RPM/V)