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Old 04-12-2001, 09:17 PM   #1
old_truck1969
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Join Date: Mar 2001
Location: Thunder Bay, Ontario, Canada
Posts: 202
Post speedometer calibration

I've got an 86 GMC 3/4 ton. It originally came with 7.50x16 tires (I think). I am currently running 245x75 tires, which are a lot shorter. Is there any way of calibrating my speedometer to compensate for the shorter tires?

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69 GMC 3/4 ton camper special(long term project)
85 GMC 3/4 ton (daily driver)

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