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Discussion Starter #1 (Edited)
I'm currious if anyone has had the dealership recalibrate their speedometers to run larger tire sizes? When I bought my 2003 Jeep Liberty I installed a lift kit skid plates and started running 255/70/16 Mud Rover MT's. I had the dealership adjust the speedometer in the pcm for the revs per mile of the new tire size. I'm wondering if the same could be done on the challenger for those wanting to run larger tires. I'm assuming the speedometer is based on the rear wheel size on the challenger.

Take it easy
Jay
 

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Most folks adjust for tire sizes with Trinity/Predator tuner. Dealer could probably do it too.
 
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