2020 Speedo Calibration

Hey guys I know there isn't anything out yet for a 2020. I was wondering if anyone knew if a dealer can correct this? I just installed 285/70/17s . For laughs and giggles I tried a hypertech system updated it to latest firmware and chose 2018 tacoma and obviously it did not work lol. Speedo read 0. I read a post on someone who said it worked for their 2019, so I gave it a shot! Anyhow just looking for info!

 

I called my dealer for my 2019. They said that they had no way to change the 2019+. We had a laugh about the ridiculousness of it, and I moved on.

For your speed you just need to ad 5mph in your head. For fuel mileage and odometer you just add 6.9%.

 

i have an escort max 360 radar that always displays speed luckily! ill keep the 6.9% for mileage! Thanks @Shouldnthave

 

My ‘20 Sport 2wd with OEM sized tires has a readout of 2 mph slower than the actual speed. Manual Pro readout is 1 mph off.

 

FWIW I just went from stock on my 19 to 255/80/17 and checked both with my handheld GPS. I didn't have any change until around 70 MPH. Then it was slight over that 1-2 MPH.

 

Mine at 35 on speedo marks 37-38 on gps. I haven't checked at high speeds! Don't drive much lol

 

@Pablo8

 

What tires do you have? I wanted to to w skinnies, but choices were limited! These are kinda wide compared to my old ride!

 

I wanted falkens but they were out of stock everywhere until March so I went ST Maxx

 

I didn't do my research as usual! I thought falkens weren't available in that size! I think I was looking at 255/85/16 though! My tires look like they want to rub a bit on the inner flare at 3/4 lock! I wish I would've gone 255/80/17! Next time lol