It seems like I am going faster than my speedometer says now. Does it need to be calibrated to the new larger tires?
2006-08-19 04:08:36 · 16 answers · asked by ♥monamarie♥ 5 in Cars & Transportation ➔ Other - Cars & Transportation
yes it does...bigger tires travel farther than little tires on 1 complete revolution....meaning if it turns 60 times a minute, you will have traveled farther in the 60 seconds meaning you had to go faster to get there... the manufacturer designs it with an exact size tire the engine and transmission doesn't know what size tires you have and they doesn't care. in high gea,r the engine turnes 1 revolution to one revolution of the drive axle. if you change the tire size you must also change the transmission speedometer reduction gear. otherwise the speedometer thinks you still have small tires and displays the speed accordingly.. hope that makes sense.
domesticfreak should go back to doin what he know s,which aint mechanicin'
and purnellsweet doesn't know the difference between an odometer and a speedometer....pitiful!
luis is deep into math...he probibally know the formula for figuring the radio station you listen to from the amount of gas in the tank...
2006-08-19 04:13:47 · answer #1 · answered by Anonymous · 2⤊ 0⤋
What's all this about truck lifting? Quite confusing, lass!
Larger tyres will certainly make the speedometer show a speed slower than you're gong. The speedometer knows only how many times in a given period - let's say a second - the axle of the wheel moves. Apart from this, don't you feel less power when you climb a hill?
Yes, do calibrate - and afore the cops get thee.
2006-08-19 11:24:49 · answer #2 · answered by RebelBlood 3 · 0⤊ 0⤋
Yes it does. The speedometer is really measuring the angular velocity of the wheels (RPM) and converting that to a linear velocity (MPH). The linear velocity is a function of the diameter of the tires. The larger the tire, the faster you go if turning at a constant speed.
Think about how much a large tire vs. a small tire will move if each one makes just one turn.
2006-08-19 11:20:33 · answer #3 · answered by Luis T 2 · 0⤊ 0⤋
Yes, larger tires will make the speedometer inaccurate. Larger tires actually make the speedo read slower than you are actually going. If its a newer truck, you can have the computer calibrated. If its older, you have to change the driven speedo gear in the transmission.
2006-08-19 11:16:06 · answer #4 · answered by DIRT MCGIRT 3 · 3⤊ 0⤋
The bigger the tires the faster you will be going and the speedometer will read lower.
Find one of those radars that cops put up in places that shows your speed and drive by one. Or you an just find a cop checking speed and drive by him at 10 miles over the speed limit and he will give you a ticket with your correct speed on it.
Many ways of finding out. Or you can just do the math. The size of your old tires will role so far in one full revolution and the big tires will role so far in one full rev. Look up the formula on yahoo.
2006-08-19 11:17:58 · answer #5 · answered by Don K 5 · 0⤊ 0⤋
if you go too large, then the rate of spin at the outside of the tire is higher, (see the relationship between circumference of a circle and the diameter in any math textbook) the formula to determine the circumference is C=3.14159*(0.5* diameter) squared.
the short answer is yes, and yes. huge tires have more linear surface area, and as a result with each turn of the axle you travel farther, since you travel at the same rate of turn with larger or smaller tires, you must then be traveling at a faster speed as you are going further with each turn of the wheel.
2006-08-19 11:18:07 · answer #6 · answered by wolfmaster1701 2 · 0⤊ 0⤋
Yes.Your trucks speedometer is designed for the stock tire size your truck came with.
2006-08-19 11:18:26 · answer #7 · answered by scott m 4 · 0⤊ 0⤋
Yes, if you have an older truck, then you need to change your Speedo Gears to the ratio that you need.
If you have a newer truck ( with Speed Sensor) then you have to calibrated, if not it also cause the Engine Service and ABS light to come on (Speed Ratios)
2006-08-19 11:20:46 · answer #8 · answered by Mai N 3 · 1⤊ 0⤋
That messes your spedometer up. They use tire rotation to figure out how fast you're going. You have to have your spedometer calibrated to match your new tire size. If you've got a bigger tire it rotates less times to cover the same distance becuase its got more surface area. You're spedometer doesn't know that though. It thinks its all the same.
2006-08-19 11:20:45 · answer #9 · answered by Ashley 3 · 0⤊ 0⤋
yes, you would be running faster than what your speedometer says. larger tire means bigger diameter/circumference.
2006-08-19 11:18:38 · answer #10 · answered by Anonymous · 0⤊ 0⤋