Gear Ratio Chart/Pinion Gear Selection - Evader ST/BX With 88T 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 15.60533333 21 11.14666667     FDR Starting Point Pinion
16 14.63 22 10.64 Novak Velociti 6.5R 12.2-12.7:1 18-20**
17 13.76941176 23 10.1773913 Novak SS5800 12.3:1 17-18**
18 13.00444444 24 9.753333333 Novak SS4300 12.5:1 18-19**
19 12.32 25 9.3632 **These are Novak's recommendations based on FDR
20 11.704 26 9.003076923
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 -2.253564556 15 -4.609759046 15 -6.180555373   - Negative numbers reflect undergearing
16 -1.278231222 16 -3.634425712 16 -5.205222039
17 -0.417642987 17 -2.773837477 17 -4.344633804
18 0.347324333 18 -2.008870157 18 -3.579666484
19 1.031768778 19 -1.324425712 19 -2.895222039
20 1.647768778 20 -0.708425712 20 -2.279222039
21 2.205102111 21 -0.151092379 21 -1.721888706
22 2.711768778 22 0.355574288 22 -1.215222039
23 3.174377473 23 0.818182983 23 -0.752613344
24 3.598435444 24 1.242240954 24 -0.328555373
25 3.988568778 25 1.632374288 25 0.061577961
26 4.348691855 26 1.992497364 26 0.421701038
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) 27.00748 31.50873 33.21942 38.75553 28.72827 33.51601 29.15434 34.01279 27.76779 32.39575 33.05689 38.56637 37.68486 43.96566 42.31281971
Street (21T) 27.47474 32.05386 33.79415 39.42604 29.2253 34.09588 29.65874 34.60124 28.2482 32.95623 33.62881 39.23361 38.33684 44.72632 43.04487542
Foam (25T) 28.03545 32.70802 34.48383 40.23066 29.82174 34.79171 30.26402 35.30739 28.82469 33.62881 34.31511 40.0343 39.11923 45.6391 43.92334226
** 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)