Have you installed tires smaller than the OE tires? If so this is the problem.
First, make sure the vehicle has the right size tires. Look on the door plate or in the glove box to find the size recommendations. If the tires are sized correctly, the speedometer cable gear can be changed to affect the speedometer displayed speed. Remove the cable where it enters the transmission tailshaft, count the number of teeth and get a different size gear depending on whether you want the speedometer to display faster or slower. If the speedometer is showing slower than you are actually travelling, get fewer teeth on a replacment gear. If the speedometer is showing faster than you are actually travelling get a gear with MORE teeth on the replacment gear.
If you change the size of the diameter of the original size of tire , YES If you go LARGER in diameter , you will actually be going FASTER then your speedometer indicates and If you go SMALLER in diameter , you will actually be going SLOWER than your speedometer indicates
Yes, if you get bigger tires it will say you are going slower than you are, and visa versa, you can go to a mechanic to get it recalibrated
60
The 99 tires are much bigger than the 90 tires. With the smaller tires on the 99 you would be going slower than indicated on the speedometer.
The speedometer in a car runs based off the speed of the transmission. The gears in the transmission spin at a known rate for the speed the vehicle is traveling at. The faster the gears spin the more the speedometer goes up. If a person replaces stock tires with larger tires, then the tires will spin slower, which will cause the speedometer to read at a value that is less than the actual speed.
My 2009 Zuma 125 goes 55 according to it's speedometer which has a 70 MPH maximum reading. Although I can think of no reason why it should be inaccurate, I have read elsewhere that the real speed is actually 5 MPH slower than what the speedometer says, but I have not done any testing of the statement. It is really suited for secondary roads only, but has excellent acceleration.
Neither of them is an indication of absolute speed, so neither of them is slower than the other. They both mean that the music should gradually get slower, but that is all. They indicate a process, not a state.
The size of tires can effect that accuracy of a speedometer. Larger tires will cause the speedometer to read less than you are actually going.
The gait slower than a canter is the trot!
Slower than what?
Slower than what?