Speedometer is off

[95Honda_Chick]

We discovered that my speedometer is off. While I was following my husband home one evening and he normally does around 120-130kph and my speedometer was showing 140kph. I called him on his cell phone and he said he was doing 125kph. What could cause something like this? I suspected this for some time, driving in the mornings rush hour traffic and noticed that my speed seemed awfully high for what the flow of traffic was doing.

Thoughts?

[iLLeFFeKt CiViC]

since you're from canada i think you meant 140 KILOMETERS an hour and not MILES an hour.
what size tires do you have on your car? honda/acura speedometers are known to be off.

[95Honda_Chick]

..I think they are 16"...this is the first time in 12 years i've had an issue with the speedometer

[isnbrg9]

Originally Posted by 95Honda_Chick

..I think they are 16"...this is the first time in 12 years i've had an issue with the speedometer

the overall diameter of your crrent rim/tire combo is most likely smaller then what came stock, thus making you're speedo read faster then your actual speed.

stock should be 185/60-14 with d=22.74"
if you're running 205/40-16, then d = 22.46"

being a 1/4" off shouldn't account for a 15kph difference though.