My friend set my Procal for me but also did it w 50 psi. Doing the chalk test today to get proper wear on the tires. After complete, how do I measure the tire for proper size to reset procal for proper speedometer and shift points? From pavement to top? I know some guys measure half and multiply by 2. Thanks

 

i measure from pavement to the tip top of the tire. if i remember correctly the procal does tire measurement in .25'' increments so if you are in the ballpark you should be good.

 

pavement to shoulder of tire.

 

Thanks fellas.