Best Answer

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 :)

User Avatar

Wiki User

15y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why do you calibrate speedometer after bigger tires are installed?
Write your answer...
Still have questions?
magnify glass
Related questions

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.

Do bigger tires effect the speedometer in how speed in calculated?

Yes, they do.

Can you adjust the speedometer to compensate for bigger tires?

I have never found a way to "adjust" any speedometer.

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 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 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.

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.

What is it when your 92 dodge stealth rt speedometer reads faster then you really are going?

Could be that the wrong size tires are installed, or that somewhere along the line, a different rear-end gear ratio was installed.

Why does my Speedometer read faster than I am driving?

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.

Does putting bigger tires on a car affect the handling?

Putting larger tires on your car will give you higher top spee with less torque. However, changing the tire size will make your speedometer inaccurate.