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You recalibrate it because bigger tires mean different speeds... for example, lets say your car had 14 inch tires... and your speedometer is saying that you are going 50, if you add 20 inch tires which is 6 inches bigger, you might be going around 60-70. No need to get a speeding ticket. Bigger tires cover more road then smaller tires, for example for ever 1 turn from a 20 inch tire is like 1 and ahalf turns from a 14 inch... Hope Ive helped you understand why :)
What else can I help you with?
Is it possible to calibrate the speedometer on a 1996 Ford Taurus GL Mine is 6mph higher than it should be?
slightly bigger tires
How do you have truck calibrate speedometer after going from 20 inch tires to 24 inch tires?
On most newer vehicles t is done with a scan tool.
Can you adjust the speedometer to compensate for bigger tires?
I have never found a way to "adjust" any speedometer.
Do bigger tires effect the speedometer in how speed in calculated?
Yes, they do.
When should a speedometer be calibrated?
when you get bigger tires, or different rear end gears.
Why is your 95 explorer speedometer 10 mph slower than it should be?
Have you installed tires smaller than the OE tires? If so this is the problem.
How do you recalibrate speedometer and odometer on 1995 Chevy 1500 z71 with 35 inch tires and lift kit?
Jet Accu Speed Speedometer calibrator. It adjusts your speedometer for bigger tires or gear change. Only works on automatic transmissions.
How do you calibrate the speedometer in 1999 Jeep wrangler for 33 tires?
You can only do this if you have a LUFKIN SLIDE RULE made in Kosmonia. Get one ; and email me back and I'll tell what to do with it.
HOW TO CALIBRATE AN AUTO METER SPEEDOMETER?
To calibrate an auto meter speedometer, first ensure that your vehicle is on a flat surface and that the tires are properly inflated. Then, use a GPS speed tracking app to measure your vehicle's speed while driving at a steady pace. Compare the GPS reading with the speedometer reading and note any discrepancies. Adjust the speedometer according to the manufacturer's instructions, which may involve a calibration tool or adjusting a calibration screw until the readings align.
Will 1999 Ford Escort use 1990 Ford Escort tires?
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.
How do you change the speedometer gear on a 4x4 88 Comanche for bigger tires?
To change the speedometer gear on a 1988 Jeep Comanche with 4x4 for bigger tires, first, determine the correct gear ratio based on your new tire size. Remove the speedometer cable from the transfer case, then unbolt and remove the speedometer gear housing. Replace the existing gear with one that matches your new tire size and reinstall the housing and speedometer cable. Finally, test the speedometer to ensure it's accurate.
Where do you get the speedometer calibrated?
You can get your speedometer calibrated at an automotive repair shop or dealership that offers calibration services. Some tire shops also provide this service, particularly if you've changed the size of your tires. Additionally, specialized speedometer calibration shops may be available in your area. It's important to ensure that the service provider has the right equipment to accurately calibrate your vehicle's speedometer.
