Do I need to program Speedo

[HSKR R/T]

Update: 295/65-20 BFG KO2's ended up at 2700-MM as a circumference that is spot on.

295/65/20 is a true 35" tall tire. 35/12.50s are not

 

[SDPWRWGN]

if you've got AlfaOBD, it's a 5 minute process (if that) to change the tire size. I've done a few trucks now to change them and they are all back to being dead on again.

Can you change the factory set TPMS alarm/dash light set points with the AlfaOBD? I want to run my power wagon tires around 50/55 and the computer is set to 60/65.

 

[skyhawk42]

Can you change the factory set TPMS alarm/dash light set points with the AlfaOBD? I want to run my power wagon tires around 50/55 and the computer is set to 60/65.

To change the tire pressure thresholds, connect to the body computer, go into car configuration change, and find these two:

VehConfig 2: Max Load Inflation Pressure Rear

Tire (0-126PSI) - enter psi value

VehConfig 2: Max Load Inflation Pressure Front

Tire (0-126PSI) - enter psi value