Welcome to the Turbo! Saab tire size calculator!

Thanks to our friends at Miata.net, We've secured this customized tire size calculator for you to compare your current tire size to a new and different size tire, or any two tire sizes you might think of (well, within reason).

Please note that this requires a Java-enabled Browser

For those still running TRX rubber (you can still get TRX rubber?), here's the comparitive data for the size Saab used:

180/65 390

Sidewall:            4.6063 in       117 mm 
Radius:             12.2835          312    
Diameter:           24.5669          624    
Circumference:      77.1791         1960.35 
Rev per...:     mi 820.95         km 510.113

Once again, thanks to Gary Fischman for the Java Applet, and customizing it for Turbo! Thanks also to Miata.net where I found Gary's calculator.