If my Tacoma came stock with 31's and I go up to 32's on stock 15x7" rims, will my speedometer/odometer still be accurate? Just wondering what other's experiences are.

 

no...but the difference will be so minute it wont be worth dealing with....we are talking like .... 2% off if that

 

yeah it's close enough. Depending on what brand tire/what size wheel, They might turn out to be the same

 

I went from 265/70-16 to 265/75-16 (~31" to ~32") and my speedometer was DEAD ON and the ODO was only off by 3.2%

 

Since my switch i have been the same...whenever i pass one of those standing radar's it seems to be dead on and when the cop gave me a ticket it was also dead on unfortunately...I wish i could get it to where it was slow by a % or 2 so i would be doing 50 thinking i was at 52 or so...i doubt you'll see a difference.

 

I've also never noticed any difference, like Scarbro said, when I pass a radar that lists my speed, it's always dead on.

 

When I did this, my speedo _became_ dead on, but now my odometer is 3% low.

 

Quoted from another thread.

 

3.8% is what I measured with almost full tread Revos.
Speed read through ODBII vs. GPS readout. Speedos of course differ from car to car but the ODO should be getting the math right through the computer.

31.9" REVO / 30.7" OEM = 3.9% (theoretical number, so leads me to believe the computer and sensors were calibrated very good at the factory for OEM tires)

 

This is a great site for seeing what the differences in size will do to the accuracy of your speedo.

http://www.1010tires.com/TireSizeCalculator.asp

 

Very cool, I had never seen that link before. Thanks!

 

im going from goodyear wrangler 265/75/16 to 285/75/16's next friday, with a lift, and new shocks (in my signature) and couldnt be more excited. what types of differences will i notice besides the speed (great link BC-4runner). also, are my new tires 33's? my durango friends brag about how big their tires are.