Speedometer inaccurate 1.6 versa sedan?

[Doghouse]

I am haveing a problem with my speed. My GPS shows an inaccuracy, and if I follow the speedometer I am getting run over.

The inaccuracy is aprox 1:.96 so when I am going 65, the gps shows 62 and I am being honked at.

I took it to the dealer and they are telling me that I am crazy and everything is exactly perfect.

Doing a little research I determined the following informaiton:Vehicle Tire Width Asp Ratio Rim Side Height Diam Circum1.6 185 65 14 4.81" 23.62" 74.20"1.8 185 65 15 4.81" 24.62" 77.34"

Forumla used:width/ratio = sidewall height in MMHeight/25 = convert to inchHeight (in)+rim+Height(in) = Diam. (2 heights as there are 2 sidewalls in one verticle cross section)

the difference in height results in a 1:.96 ratio, exactly the difference it the speed.

Is anyone else with 14" rims experiancing any difference in speed?

My beleif is that they are using 1 transmission and 2 wheel sizes. This is causing us to put on miles faster than they actually are. I don't care about the tire size, I just want my full warrentee.

[Versa357]

I looked at mine today. There is a road I take to work that has one of those signs that show your speed, My speedometer matched what the sign showed I was doing. I also have to take part of the highway to work and I was watching the mile markers again my trip odometer matched the mile markers even the tenths of miles.

[GapRunr]

This practice has been going on for decades, and most people never knew. With the advent of inexpensive GPS's now the general public is starting to see that their speedometers are off anywhere from 2% to 10%. This has always been by design, so that if a consumer were to replace his worn out tires with a different brand of either the same size or a different size, then the car manufacturer would not be liable for a car owner speeding when his speedometer was at the speed limit. Physical tire sizes differ greatly from one manufacturer to the other, even when they are the "same size".

However, just because your speedometer is off, it does not necessarily mean that the odometer is off. Every vehicle I have ever owned had an inaccurate speedometer, but the odometers were accurate. Next time you go on a good highway drive of 50 miles or more, reset the tripmeter on your car and on your GPS and then compare the odometer readings. If they differ at the end of the trip, then you should have your dealer look at it.

I'm betting the odometer is pretty accurate.

[Shad0wXCalibur]

When you get new tires, go one size bigger...

[shiryu0]

the guys math is correct though, Nissan could have goofed up with the programming, u never know, the 14 inch tire is 1 inch shorter ( why? nissan why???? ).........

you would need a 185/70/14 to get close to the 185/65/15s height........

[Shad0wXCalibur]

the guys math is correct though, Nissan could have goofed up with the programming, u never know, the 14 inch tire is 1 inch shorter ( why? nissan why???? )

Economy. The smaller wheels and tires are most likely cheaper and easier to move by the 1.6 liter. Don't forget that the base Versa is incredibly stripped down to make it the price it is.

[Versa357]

Economy. The smaller wheels and tires are most likely cheaper and easier to move by the 1.6 liter. Don't forget that the base Versa is incredibly stripped down to make it the price it is.

Actually those tires on the 1.6 are pretty expensive for 14" tires. They cost more then the stock 15" they have on the S an SL V's. They are a low rolling resistance tire and cost $102 each at tirerack. Alot of the hybrid cars have the same tires. They are Bridgestone B381 tires.

[dachmo]

Mine is off by about 3-4mph @60-85mph. I first noticed it driving next to a Civic and I saw the LCD Speedo readout.

[temba]

My 2011 Versa is in the service department right now with the same issue. I notice the problem when my speedometer was 4-5 mph off from my TomTom and the Speed post that are located on the streets. The service department is trying to calibrate the speedometer and has reduced the issue down to 1-2 mph off. They are happy to replace the speedometer, but stated that it probably won't fix the issue. They also tested another new car on the lot and found the same issue. I wonder if this is a hazard or if it really put more miles on the odometer. Please reply