Gear
Ratio Guide For Larger Tires
When ever you change tire size from the
original size to another there will be a direct effect on power and
drivability. We have developed this chart to help you select the optimum
gear ratio to put your performance back where you want it.
Using the chart below, first determine your
original gear ratio and tire size and follow to the intersection that
should be your approximate RPM at 65 MPH. Next find your new tire size and
follow that across to the closest RPM to your original and that will be
first choice.
If you are interested in a change that will
give more power or better fuel mileage use the color coding as a guide.
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Highway Driving,
Good Fuel Economy
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Daily
Driver, Best Overall Performance
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|
Most Power
and Towing, Reduced Fuel Economy
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This chart is based on 65 MPH and a
gear ratio of 1:1, on a manual transmission in 4th gear.
Please NOTE: If you have an
automatic transmission your RPM will higher due to slippage in the
transmission and the torque converter. With an overdrive transmission your
RPM in overdrive will be 15% to 30% less than indicated.
Calculator:
Check out our calculator to automatically calculate the gears you'll need
after a tire change HERE.
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|
2.35 |
2.73 |
2.94 |
3.07 |
3.21 |
3.31 |
3.42 |
3.55 |
3.73 |
3.91 |
4.11 |
4.27 |
4.56 |
4.88 |
5.13 |
5.29 |
5.38 |
5.71 |
6.17 |
7.17 |
22 |
2333 |
2710 |
2919 |
3048 |
3178 |
3286 |
3395 |
3524 |
3703 |
3882 |
4080 |
4239 |
4527 |
4845 |
5093 |
5252 |
5341 |
5668 |
6125 |
7118 |
23 |
2231 |
2592 |
2792 |
2915 |
3048 |
3143 |
3248 |
3371 |
3542 |
3713 |
3903 |
4055 |
4330 |
4634 |
4871 |
5023 |
5109 |
5422 |
5859 |
6808 |
24 |
2139 |
2484 |
2675 |
2794 |
2921 |
3012 |
3112 |
3231 |
3394 |
3558 |
3740 |
3886 |
4150 |
4441 |
4668 |
4814 |
4896 |
5196 |
5615 |
6525 |
25 |
2053 |
2385 |
2568 |
2682 |
2804 |
2892 |
2988 |
3101 |
3259 |
3416 |
3590 |
3730 |
3984 |
4263 |
4482 |
4621 |
4700 |
4988 |
5390 |
6264 |
26 |
1974 |
2293 |
2470 |
2579 |
2696 |
2780 |
2873 |
2982 |
3133 |
3284 |
3452 |
3587 |
3830 |
4099 |
4309 |
4444 |
4519 |
4796 |
5183 |
6023 |
27 |
1901 |
2208 |
2378 |
2483 |
2597 |
2677 |
2766 |
2872 |
3017 |
3163 |
3325 |
3454 |
3689 |
3947 |
4150 |
4279 |
4352 |
4619 |
4991 |
5800 |
28 |
1833 |
2129 |
2293 |
2395 |
2504 |
2582 |
2668 |
2769 |
2909 |
3050 |
3206 |
3331 |
3557 |
3806 |
4001 |
4126 |
4196 |
4454 |
4813 |
5593 |
29 |
1770 |
2056 |
2214 |
2312 |
2417 |
2493 |
2576 |
2674 |
2809 |
2945 |
3095 |
3216 |
3434 |
3675 |
3863 |
3984 |
4052 |
4300 |
4647 |
5400 |
30 |
1711 |
1987 |
2140 |
2235 |
2337 |
2410 |
2490 |
2584 |
2715 |
2846 |
2992 |
3109 |
3320 |
3553 |
3735 |
3851 |
3917 |
4157 |
4492 |
5220 |
31 |
1656 |
1923 |
2071 |
2163 |
2261 |
2332 |
2409 |
2501 |
2628 |
2755 |
2896 |
3008 |
3213 |
3438 |
3614 |
3727 |
3790 |
4023 |
4347 |
5051 |
32 |
1604 |
1863 |
2007 |
2095 |
2191 |
2259 |
2334 |
2423 |
2546 |
2669 |
2805 |
2914 |
3112 |
3331 |
3501 |
3610 |
3672 |
3897 |
4211 |
4894 |
33 |
1555 |
1807 |
1946 |
2032 |
2124 |
2191 |
2263 |
2349 |
2469 |
2588 |
2720 |
2826 |
3018 |
3230 |
3395 |
3501 |
3561 |
3779 |
4083 |
4745 |
34 |
1510 |
1754 |
1889 |
1972 |
2062 |
2126 |
2197 |
2280 |
2396 |
2512 |
2640 |
2743 |
2929 |
3135 |
3295 |
3398 |
3456 |
3668 |
3963 |
4606 |
35 |
1466 |
1704 |
1835 |
1916 |
2003 |
2065 |
2134 |
2215 |
2328 |
2440 |
2565 |
2664 |
2845 |
3045 |
3201 |
3301 |
3357 |
3563 |
3850 |
4474 |
36 |
1426 |
1656 |
1784 |
1862 |
1947 |
2008 |
2075 |
2154 |
2263 |
2372 |
2493 |
2590 |
2766 |
2961 |
3112 |
3209 |
3264 |
3464 |
3743 |
4350 |
37 |
1387 |
1611 |
1735 |
1812 |
1895 |
1954 |
2019 |
2095 |
2202 |
2308 |
2426 |
2520 |
2692 |
2881 |
3028 |
3123 |
3176 |
3370 |
3642 |
4232 |
38 |
1351 |
1569 |
1690 |
1764 |
1845 |
1902 |
1966 |
2040 |
2144 |
2247 |
2362 |
2454 |
2621 |
2805 |
2948 |
3040 |
3092 |
3282 |
3546 |
4121 |
39 |
1316 |
1529 |
1646 |
1719 |
1798 |
1854 |
1915 |
1988 |
2089 |
2190 |
2302 |
2391 |
2554 |
2733 |
2873 |
2962 |
3013 |
3198 |
3455 |
4015 |
40 |
1283 |
1491 |
1605 |
1676 |
1753 |
1807 |
1867 |
1938 |
2037 |
2135 |
2244 |
2331 |
2490 |
2664 |
2801 |
2888 |
2937 |
3118 |
3369 |
3915 |
41 |
1252 |
1454 |
1566 |
1635 |
1710 |
1763 |
1822 |
1891 |
1987 |
2083 |
2189 |
2275 |
2492 |
2599 |
2733 |
2818 |
2866 |
3042 |
3287 |
3819 |
42 |
1222 |
1420 |
1529 |
1596 |
1669 |
1721 |
1778 |
1846 |
1940 |
2033 |
2137 |
2220 |
2371 |
2538 |
2668 |
2751 |
2798 |
2969 |
3208 |
3728 |
43 |
1194 |
1387 |
1493 |
1559 |
1630 |
1681 |
1737 |
1803 |
1894 |
1986 |
2087 |
2169 |
2316 |
2479 |
2606 |
2687 |
2733 |
2900 |
3134 |
3642 |
44 |
1166 |
1355 |
1459 |
1524 |
1593 |
1643 |
1698 |
1762 |
1851 |
1941 |
2040 |
2119 |
2263 |
2422 |
2545 |
2626 |
2670 |
2834 |
3063 |
3559 |
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