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Larger tires racking up miles faster?

dsmx587

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I have a 21 ram, I’m putting 35x12.50 venom tires on the factory 22’s, this truck is a lease so I’m watching the miles…..the revolutions per mile are supposed to be less than the factory tires, but the speedometer will read a lower speed than I am actually going….this info came from a tire calculator on tacomaworld.com
My question is will the larger tires make the computer think I’m putting on more miles than I actually am?
 

Richard320

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No.

It converts revolutions to distance. If you go further per revolution than it's programmed to think, it will read lower than actual. So will the speedometer. And the fuel economy meter will also read lower than actual.

Anyway, if it's 35 miles to work now, it'll show you've only gone 32 with the new tires. Unless/until you get it reprogramed.
 

dsmx587

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No.

It converts revolutions to distance. If you go further per revolution than it's programmed to think, it will read lower than actual. So will the speedometer. And the fuel economy meter will also read lower than actual.

Anyway, if it's 35 miles to work now, it'll show you've only gone 32 with the new tires. Unless/until you get it reprogramed.
okay thanks
 

TNRamGuy

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Sometimes your tire shop can do it included with tire mounting, a dealer can, but will usually charge. There are a few tools that can do it also, 'tazer dt', and others, I am sure that folks can chime in with what they have used.
 

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