This is really an anyone thread
How many folks have ck'd their speed with a GPS?

With my 205\60-16 I was reading 5mph higher than actual speed according to GPS.
With TTS I adjusted it, now I hope GPS is correct and I'm not speeding.

Clif

 

checked it with gps and yep speedo is reading high. I live with it cause it makes me feel like im going faster and it freaks out the passanger.

At 80 im really going 75. its closer at lower speeds.
So I really only have 48.5k on the odometer not 50k too my guess.

I do have the TTS but after I had it dyno tuned by a pro I put it away.

 

If you put it on cruise control or maintain a steady speed, the GPS will be very accurate. During acceleration or deceleration, it could be off a little.