Speedometer Re-Calibration After New Tires - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Cadillac Kid · 01-24-2018, 06:26 PM

Hello.

I recently went from the 235/75r15 tires that were on my truck to 31x10.50r15 tires. They are taller, and because of that my speedometer reads slower than the truck is actually going. I don't know what speedometer gear I need to change to. I'd think that someone has had this issue before after installing taller tires. Any guidance is appreciated.

Thanks

-Gavin

geezer#99 · 01-24-2018, 07:22 PM

I always use a ratio adaptor to correct mine.
Look here for one.
https://transmissioncenter.net/

01-24-2018, 06:26 PM	#1
Cadillac Kid Registered User Join Date: Jun 2016 Location: Redondo Beach, CA Posts: 72	Speedometer Re-Calibration After New Tires Hello. I recently went from the 235/75r15 tires that were on my truck to 31x10.50r15 tires. They are taller, and because of that my speedometer reads slower than the truck is actually going. I don't know what speedometer gear I need to change to. I'd think that someone has had this issue before after installing taller tires. Any guidance is appreciated. Thanks -Gavin __________________ Keep on truckin'

01-24-2018, 07:22 PM	#2
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,731	Re: Speedometer Re-Calibration After New Tires I always use a ratio adaptor to correct mine. Look here for one. https://transmissioncenter.net/



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