Speedometer error / gps

[Monzaveo]

Anyone here have a GPS device that tells the speed being traveled?

According to mine GPS, my '06 Aveo speedo reads 3 to 4 mph fast at any given speed.

Anyone else find the same thing?

[petrified.rabbit]

are you still on stock tires? if so, most cars 95% i would say, read a little fast on the speedo when compared to actual speed.

if you are not running factory sizes then most likely the noticeable difference is from the sizes you put on..

[Monzaveo]

Hey dude.

Yeah, tire size difference could cause discrepancy.

I'm on my second set, but specs are the same but these do seem to be a tick wider and shorter than the factory Hankooks.

there stock equivalent 185 65 14s I believe, from Riken.

But not to hijack the topic. anyone else run a gps reading against there speedo?

[ontarian_frog]

I did and mine is about 7% off. I'd get it changed at the dealership, but I'm too lazy. There is a TSB out for speedos that are way off.

[bartlett608]

Mine reads slow, but only about 2.5mph at an indicated 60 mph. Mine is because I am running tires that are 2/10 of an inch larger than stock. As the tire wears the speedo will go back to dead on and probably be fast at the end of the tires life.

[y2dgone]

yes when i upped my rims to miata rims and tires it read off about 3-5 mph, my SVX is off about 7-9mph after changing out the gear set, at least im less likely to get caught speeding...

[tidus10]

its an aveo bro you cant speed!!

and also guys some GPS modules are based on a 1-5 Meter perimeter of where the GPS is so that can acomidate for your diffence in speed, the only true ways to tell is a radar gun (or those police radar traps) or a digital speedo...never trust an external device to tell you exactly how fast your going

[*_Mystik_*]

I've changed tires but put on specs' size tire which I beleive is 185-60-r14 but my speedo indicates faster... about 5-6% off.

Is it worth the repaired if car is still under warranty?

[y2dgone]

You might be able to get the dealer to recalibrate the meter/sensor under warranty if the tires are the same size as OEM and you're using the OEM rims. It's worth a shot, but really they could say no just based on the fact that you're not using OEM tires

[thehunterooo]

i dont think they would touch it if anything is not stock, or say nothing is wrong with the car as there really isnt anything wrong with it, but worth a try i suppose