If you dont know the wheel radius, or cant be bothered to go and measure, fill in the tyre width/profile and rim diameter, hit calculate and then copy the number you get from the radius calculation, return to this page and paste the radius in.

Leave 6th as 99 if you dont have a 6 speed transmission.

  Units  
   

Use Tyre Size rather than Wheel Radius

Use Wheel Radius (ive gone and measured it)

 
Wheel Radius mm (centre of wheel to the floor)
     
GearBox    
1st  
2nd  
3rd  
4th  
5th  
6th  
     
Final Drive Ratio  
   
Tyre Width mm
Tyre Profile %
Rim Diameter Inches
     
Rev Limit Rpm

DISCLAIMER : If you get caught for speeding and then try to blame this calculator its not my fault. This relies on the fact that your revs and wheel size is accurate... its purely for indication purposes only.

Thank you.

If you wish to Email me, please do so here