Have any of you guys noticed that your speedometer is off by tracking it with your GPS? I've noticed that over the years when I was sure that I was going to get nailed by a smokie hiding in the bushes for traveling over the speed limit, I've not been pulled over. KNOCK WOOD. Anyway, I have noticed while using my phone for directions, that according to IT, my speedometer is 3mph SLOWER than it shows. If I put my foot to 70 mph, the GPS shows 67. If I hit 80, it shows 77. At 50, it shows I'm doing 47. It's not really a big deal. I was just curious if any of you other guys have paid any attention to this with YOUR Forte. Mine is 2017 Forte LX with the 2.0 engine and of course, automatic. And NO, I don't have cruise control on the car, but a constant difference of 3mph at any posted speed on the speedometer is a little unusual, don't you think?
Chuzz
We have the police department radar speed devices that show your driving speed. They show my '22 Forte LXS's velocity as about two mph less than what is indicated on my digital instrument panel. So, I expect this is a built-in calibration choice by Kia.
My Sonatas we're also two mph under what the police radar units showed.
My Ford Tauruses consistently were three mph under.
I surmise that tire wear also slightly affects the difference between indicated speed and actual speed given that a new tire can be between 1/4 to 1/2 inch taller, thereby allowing the new tire to turn slower at a given speed. Interesting concept to ponder, at least, on a frigid day where I can't go outside.
My Sonatas we're also two mph under what the police radar units showed.
My Ford Tauruses consistently were three mph under.
I surmise that tire wear also slightly affects the difference between indicated speed and actual speed given that a new tire can be between 1/4 to 1/2 inch taller, thereby allowing the new tire to turn slower at a given speed. Interesting concept to ponder, at least, on a frigid day where I can't go outside.
It is normal. Car manufacturers are allowed a ~5mph variance in accuracy. On top of that if your tires aspect ratio isn’t matched correctly for the car, it can throw off your speedometer in either direction.
I personally think GPS speed tracking is the least accurate versus speedo or radar. I don't really trust the accuracy of the temporary radar signs they put up either; some match my speedo exactly, some are off by a few km/h.
I've always heard that car manufacturers make the speedometer read a wee bit faster than you're actually going.
I've always heard that car manufacturers make the speedometer read a wee bit faster than you're actually going.
I've gotten 2 tickets in the past year for doing 84 in a 70. My cruise control-set speed? 84. So YMMV...literally
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