Updating OEM rims/tires to TRD - Speedometer?

@DeadEyeWI here is a couple charts showing exact difference in size between 265/70R16 & 265/70R17 and also the difference in speedometer .. hope this helps

 

It really depends on the actual size of the new tires and how close to accurate your speedometer is from the factory.

I went to court earlier this year on a speeding ticket and I had my speedo calibrated to provide documentation for the judge as my tire size was only increased one size up from stock. 265/70/17 instead of the OEM 265/70/16.

This is a copy of the results


Even with the tire upsize, according to the tire size calculator, it should only decrease indicated speed by less than 2mph at 65. Speedo certifying agent says he typically sees Tacoma speedometers reading about 3-4 mph too slow which is about what we see here on the dyno when you account for the tire change.

According to him, manufacture tolerance is about +/- 5% so 3 mph at 60 is about right.

 

Your 9 months are way off. Try 19 years and nine months for a boy and about 26 years and nine months for a girl unless you can pawn them off on someone else a bit earlier. Congratulations on your new life.

 

Thanks for the replies guys...I appreciate it