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Proformance Pros' Quick Change Gearset Ratio Calculator
 Calculate your final ratio and max MPH by filling out the data inputs  section.
 Spreadsheet courtesy of Proformancepros.com
      
      
 INPUT DATA IN YELLOW BOXES 
  
 TeethRatio1:1 Gearset with
 4.08 Ratio
1.64:1 Gearset with
 4.08 Ratio
2.421:1 Gearset with
 4.08 Ratio
2.824:1 Gearset with
 4.08 Ratio
MPH @
 Given RPM
      
DriverDriven       Input Tire Diameter -->35 TC Drive Gear Ratio's to Select from: 
Tire Diameter35 21432.0488.3513.7020.2323.5922.06 Input Engine RPM-->5000 1:1 
   21422.0008.1613.3819.7623.0422.58 Input TC Drive Gear Ratio -->2.824:1 1.64:1 
Engine RPM5000 22421.9097.7912.7718.8622.0023.66 Input Ring and Pinion Ratio -->4.08 2.421:1 
   22411.8647.6012.4718.4121.4724.23    2.824:1 
TC Drive Gear Ratio2.824:1 23411.7837.2711.9317.6120.5425.34    Ratios must be typed EXACTLY as shown 
   23401.7397.1011.6417.1820.0425.97      
Ring & Pinion Ratio4.08 24401.6676.8011.1516.4619.2027.10





   24391.6256.6310.8716.0518.7227.79





   32511.5946.5010.6615.7418.3628.34





   25391.5606.3610.4415.4117.9728.951:1




   26401.5386.2810.2915.2017.7329.36




=1:1N8
   25381.5206.2010.1715.0117.5129.711.64:1




   30451.5006.1210.0414.8217.2830.11





   26381.4625.969.7814.4416.8430.902.421:1




   27391.4445.899.6714.2716.6431.27





   26371.4235.819.5214.0616.4031.742.824:1




   28391.3935.689.3213.7616.0532.42





   27371.3705.599.1713.5415.7932.96





   29391.3455.499.0013.2815.4933.58





   27361.3335.448.9213.1715.3633.87





   29381.3105.358.7712.9415.1034.47





   28361.2865.258.6012.7014.8135.13





   28351.2505.108.3612.3514.4036.13





   29351.2074.928.0811.9213.9137.42





   29341.1724.787.8411.5813.5138.52





   30341.1334.627.5811.1913.0639.85





   30331.1004.497.3610.8712.6741.06





   31331.0654.347.1210.5112.2742.43





   31321.0324.216.9110.2011.8943.75





   32321.0004.086.699.8811.5245.16





   Overdriven  Sets





   32310.9693.956.489.5711.1646.62





   33310.9393.836.299.2810.8248.08





   33300.9093.716.088.9810.4749.68





   34300.8823.605.908.7210.1751.18





   34290.8533.485.718.439.8352.95





Note  Tooth Count when
 placing your order.
35290.8293.385.548.189.5554.51





35280.8003.265.357.909.2256.45





36280.7783.175.207.688.9658.07





36270.7503.065.027.418.6460.22





37270.7302.984.887.218.4161.89 




37260.7032.874.706.948.1064.27