LS1TECH - Camaro and Firebird Forum Discussion - How to adjust tire size in hp tuners?

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08 pimpala ss

04-08-2014 06:55 PM

How to adjust tire size in hp tuners?

I got my new tires today a BFG T/A KDW 255/40/18 how do i set it i know where to go but what do i enter??????????????????

91parkave

04-08-2014 07:15 PM

26.03 inches

08 pimpala ss

04-08-2014 08:05 PM

I just tried that and went for a ride and it puts my speedo way off like 25 mph slow i was going 30 on the gps speed and 5 on the dash any ideas

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