Pressures and Speedo
03-27-2008, 11:47 PM
#1
Pressures and Speedo
I just changed out my OEM 19" wheels (with MPSCs) for 18" CCW C10s with Toyo RA1s for the track. What pressures should I run on 245/40ZR18 fronts and 305/35ZR18 rears? Also - How does the 1" diameter difference effect the speedometer?
03-28-2008, 04:21 AM
#2
Race Director
Same set up on my 997S I use for the track. I normally start out at 30f 31r and adjust from there as the day gets hotter and my track speeds go up. On a normal day I will be cold 28f 29r and that translates to 38 hot all around.
03-31-2008, 01:36 AM
#3
Thanks! I followed your advice at the track this weekend and the tires were great.
Last edited by Andrew D.; 04-01-2008 at 01:26 PM.