Speedo converter

Speedo converter : It is common knowledge that your speedo will change if you fit different sized tires, but by how much? This table uses a simple ratio calculation, so this info will only approximate your corrected speed and depends on the accuracy of tire size diameters (assuming nothing but tire size has changed).


Use this speed offset calculator to tell you how far off your vehicle's speedometer is as a result of running larger tires.

Original Tire Diameter:  
New Tire Diameter:    
Speedometer Reading (MPH): :    

Corrected Speed (MPH): 


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