I went from a 275 40r 19 to a 295 35R 19 tire. It has slightly less circumference. My speedo is roughly 1.8mph faster than the GPS says at 60mph. Is it worth adjusting and if so is it as simple as changing the driven wheel circumference under speedo? There is also a min and max circumference. Do I leave it as learn BCM or calibrate? Thanks!
Those mix max values works only if you set it to use cal. If you do not the values means nothing and its derived straightfrom BCM as build
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So if I set it to cal and then input the the circumfrance value, it will re calibrated? The circumfrance falls within the min max.
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