Nissan Regear Chart / Calculator
For proper regearing for street use on a stock weight vehicle and aerodynamics, the following formula applies, (Stock Tire Diameter / Stock Gear Ratio) = (New Tire Diameter / New Gear Ratio).
To compensate for loss of power from additional weight, additional tire rotating mass, decreased aerodynamic, or if needing additional torque / towing or off road use, It's common to choose a ratio that is 5% - 15% deeper (numerically higher) than what is reflected on these charts.
| Stock Ratio | TITAN XTERRA FRONTIER WITH 31.6" STOCK TIRE Diameter | |||||||
| New Tire Size | ||||||||
| 29 | 30 | 31 | 31.5 | 33 | 35 | 37 | ||
| 2.94 | 2.698 | 2.791 | 2.884 | 2.931 | 3.070 | 3.256 | 3.442 | |
| 3.13 | 2.872 | 2.972 | 3.071 | 3.120 | 3.269 | 3.467 | 3.665 | |
| 3.36 | 3.084 | 3.190 | 3.296 | 3.349 | 3.509 | 3.722 | 3.934 | |
| 3.54 | 3.249 | 3.361 | 3.473 | 3.529 | 3.697 | 3.921 | 4.145 | |
| 3.69 | 3.386 | 3.503 | 3.620 | 3.678 | 3.853 | 4.087 | 4.321 | |
| 3.9 | 3.579 | 3.703 | 3.826 | 3.888 | 4.073 | 4.320 | 4.566 | |
| 4.08 | 3.744 | 3.873 | 4.003 | 4.067 | 4.261 | 4.519 | 4.777 | |
| 4.3 | 3.946 | 4.082 | 4.218 | 4.286 | 4.491 | 4.763 | 5.035 | |
| Stock Ratio | PATHFINDER HARDBODY FRONTIER XTERRA WITH 29” STOCK TIRE DIA. | |||||||
| New Tire Size | ||||||||
| 29 | 30 | 31 | 31.5 | 33 | 35 | 37 | ||
| 3.7 | 3.700 | 3.828 | 3.955 | 4.019 | 4.210 | 4.466 | 4.721 | |
| 3.9 | 3.900 | 4.034 | 4.169 | 4.236 | 4.438 | 4.707 | 4.976 | |
| 4.1 | 4.100 | 4.241 | 4.383 | 4.453 | 4.666 | 4.948 | 5.231 | |
| 4.3 | 4.300 | 4.448 | 4.597 | 4.671 | 4.893 | 5.190 | 5.486 | |
| 4.6 | 4.600 | 4.759 | 4.917 | 4.997 | 5.234 | 5.552 | 5.869 | |
| 4.9 | 4.900 | 5.069 | 5.238 | 5.322 | 5.576 | 5.914 | 6.252 | |
| 5.13 | 5.130 | 5.307 | 5.484 | 5.572 | 5.838 | 6.191 | 6.545 | |