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