GEAR RATIO GUIDE FOR LARGER TIRES
Whenever you change tire size from the original size or from one size to another, this will have a direct effect on power and driveability. The chart below will help you to select the optimum gear ratio to bring the power and torque back to where you want them. Using the chart, first determine what your original gear ratio and tire size are, then follow the lines to find your approximate RPM at 65 MPH. Next find the new tire size on the left of the chart and look across to find the RPM closest to your original, the ratio listed at the top of that column will be your first choice for ratio. If you are interested in a change that will give more power or better mileage use the shaded coding as a guide.
RECOMMENDED GEAR RATIO
Best Fuel Economy20002333
Best Overall23342667
Best Power26683000
RPM CALCULATOR
Gear Ratio
Speed
Tire Diameter
Final Ratio
Gear Ratio
Speed
Tire Diameter
5 or 6 Speed
Calculated RPM
Automatic3217
Automatic w/Overdrive2132
Manual3045
5 or 6 Speed2284
GEAR RATIO CALCULATOR
Ring Gear
Pinion Gear
Pinion Gear4.10:1
TIRE DIAMETER CALCULATOR
Final Ratio
Final Ratio
Final Ratio
Final Ratio
Calculated Diameter3217
Calculated Diameter2132
Calculated Diameter3045
Calculated Diameter2284
