Gear Ratio Chart/Pinion Gear Selection - Evader ST/BX With 87T
Spur |
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Internal
Gear Ratio |
2.66 |
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Off-Road Tires |
Street Tires |
Foam Tires |
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* Off-road calcs =
Gladiator II tires w/ 4.25" diameter |
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Roll-out |
13.35176878 |
10.99557429 |
9.424777961 |
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* Street calcs = Street Hawg II or Road Hawg II
tires w/ 3.5" diameter |
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* Foam calcs = Generic
foam tires w/ 3.0" diameter |
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Final Drive Ratios |
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Pinion |
FDR (*:1) |
Pinion |
FDR (*:1) |
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15 |
15.428 |
21 |
11.02 |
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FDR Starting
Point |
Pinion |
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16 |
14.46375 |
22 |
10.51909091 |
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Novak Velociti
6.5R |
12.2-12.7:1 |
18-19** |
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17 |
13.61294118 |
23 |
10.06173913 |
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Noval SS5800 |
12.3:1 |
18-19** |
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18 |
12.85666667 |
24 |
9.6425 |
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Novak SS4300 |
12.5:1 |
18-19** |
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19 |
12.18 |
25 |
9.2568 |
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**These are Novak's recommendations based on FDR |
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20 |
11.571 |
26 |
8.900769231 |
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Efficiency Ratio1 |
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1 Closest to 0.0 is
ideal |
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Pinion |
FDR:RO - Off-Road |
Pinion |
FDR:RO -
Street |
Pinion |
FDR:RO - Foam |
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- Positive
numbers reflect overgearing |
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15 |
-2.076231222 |
15 |
-4.432425712 |
15 |
-6.003222039 |
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- Negative
numbers reflect undergearing |
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16 |
-1.111981222 |
16 |
-3.468175712 |
16 |
-5.038972039 |
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17 |
-0.261172399 |
17 |
-2.617366889 |
17 |
-4.188163216 |
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18 |
0.495102111 |
18 |
-1.861092379 |
18 |
-3.431888706 |
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19 |
1.171768778 |
19 |
-1.184425712 |
19 |
-2.755222039 |
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20 |
1.780768778 |
20 |
-0.575425712 |
20 |
-2.146222039 |
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21 |
2.331768778 |
21 |
-0.024425712 |
21 |
-1.595222039 |
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22 |
2.832677869 |
22 |
0.476483378 |
22 |
-1.094312948 |
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23 |
3.290029647 |
23 |
0.933835157 |
23 |
-0.63696117 |
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24 |
3.709268778 |
24 |
1.353074288 |
24 |
-0.217722039 |
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25 |
4.094968778 |
25 |
1.738774288 |
25 |
0.167977961 |
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26 |
4.450999547 |
26 |
2.094805057 |
26 |
0.52400873 |
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Projected Top
Speed (MPH) |
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P2K2 Pro |
Trinity D6 |
LRP V10 Spec 4 |
Orion Method R |
Novak SS4300 |
Novak SS5800 |
Mamba Max 5700 |
Novak Velociti 6.5 |
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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) |
27.31791 |
31.8709 |
33.60125 |
39.201 |
29.05848 |
33.90126 |
29.48945 |
34.40374 |
28.08696 |
32.76812 |
33.43685 |
39.00966 |
38.11801 |
44.47102 |
42.79917396 |
Street (21T) |
27.79054 |
32.42229 |
34.18259 |
39.87921 |
29.56123 |
34.48778 |
29.99965 |
34.99896 |
28.57289 |
33.33504 |
34.01535 |
39.68457 |
38.7775 |
45.24041 |
43.5396441 |
Foam (24T) |
27.22338 |
31.76062 |
33.48499 |
39.06535 |
28.95794 |
33.78395 |
29.38741 |
34.28469 |
27.98977 |
32.65473 |
33.32116 |
38.87468 |
37.98612 |
44.31714 |
42.65107994 |
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** Trinity P2K2 Pro
Stock 27T = 34,314 RPM @ 8.4V 29,412
RPM @ 7.2V (4,085 RPM/V) |
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** Trinity D6 12x2
= 42,206 RPM @ 8.4V 36,177 RPM @
7.2V (5,025 RPM/V) |
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** LRP V10 Spec 4
14x2 = 36,500 RPM @ 8.4V 31,286 RPM @
7.2V (4,345 RPM/V) |
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** Orion Method R
15x2 = 37,041 RPM @ 8.4V 31,750 RPM @
7.2V (4,410 RPM/V) |
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** Novak SS4300 =
35,280 RPM @ 8.4V 30,240 RPM @
7.2V (4,200 RPM/V) |
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** Novak SS5800 =
42,000 RPM @ 8.4V 36,000 RPM @
7.2V (5,000 RPM/V) |
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** Mamba Max 5700 =
47,880 RPM @ 8.4V 41,040 RPM @
7.2V (5,700 RPM/V) |
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** Novak Velociti
6.5 = 46,080 RPM @ 7.2V (6,400 RPM/V) |
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