Pony Car Club diff ratio Calculator  
  width    enter % height    Enter dia  
Enter Tyre size  / /  
     
Tyre height mm    
Rim height mm    
Total wheel radius mm    
Rolling circumference mm    
       
Enter Diff ratio :1    
     
Enter engine max RPM rpm    
Your top speed is KPH    
  MPH    
     
Enter your cruise RPM rpm    
Your cruise speed is KPH    
  MPH