ProCal Question
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JK Newbie
Joined: Sep 2009
Posts: 33
Likes: 0
From: Northern RI
ProCal Question
When flashing for the tire size do I measure the tire on the JK with weight on them or off such as using the spare for measuring? I'm running Toyo open country AT 285/17x16 on Black Rock 997's. Thanks
JK Jedi
Joined: Nov 2007
Posts: 5,022
Likes: 0
From: Copperopolis Ca
just measure the tire 
If you want percise measurement chalk a line on tire and ground roll till you are back on the tire line measure and devide by Pi. Or just measure the tire where its at. Ither way youll get the same within a 1/4"
If you want percise measurement chalk a line on tire and ground roll till you are back on the tire line measure and devide by Pi. Or just measure the tire where its at. Ither way youll get the same within a 1/4"
Last edited by wildandwillin; Oct 19, 2009 at 08:42 PM.
JK Jedi Master
Joined: Jan 2008
Posts: 11,463
Likes: 165
From: Austin <--> Colorado Springs
You could look at the instructions... 
In order to program the proper tire size, a measurement of the front tire will need to be taken on the vehicle under normal load and air pressure rounded to the nearest quarter inch (1/4”). Do not use the manufacturers listed tire size.
JK Junkie
Joined: Jul 2009
Posts: 2,343
Likes: 1
From: The San Andreas Fault
Measure the tire height on the Jeep (with load). The diameter can be 1-1.5" less for a 33-35" tire when loaded. The Procal can be calibrated to within a 1/4".
