my speedometer is off what to do? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*jake wells* · 10-03-2009, 01:59 AM

ok so im running 225/70R15 tires.... my speedometer works
just fine but there is one problem its says im going 35 mph but im going 45. or im doing 30 and im really doing 40.
could the problem be my tire size? i would like to know the correct tire size would be for my truck. i have the original spare but its size 8.25-15 doesn't help me is there a conversion chart for tires? i would really like to fix my problem.

Jake wells

10-03-2009, 01:59 AM	#1
jake wells Account Suspended Join Date: Sep 2009 Location: No Longer Here Posts: 352	my speedometer is off what to do? ok so im running 225/70R15 tires.... my speedometer works just fine but there is one problem its says im going 35 mph but im going 45. or im doing 30 and im really doing 40. could the problem be my tire size? i would like to know the correct tire size would be for my truck. i have the original spare but its size 8.25-15 doesn't help me is there a conversion chart for tires? i would really like to fix my problem. Jake wells



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