Tire Size Calculator

[B5blueGC]

Is there a calculator to determine the proper tire size? I have a 904 transmission with a 32 tooth speedo gear. What size tire will give me the correct speedometer reading?

 

[Katfish]

https://postimages.org/][/url]

 

[B5blueGC]

https://postimages.org/][/url]

Thanks. I found one here.
https://www.tciauto.com/speedometer-gear-calculator