which will be more accurate etc..
2007-06-30 11:14:47 · 5 answers · asked by Wildroze 4 in Science & Mathematics ➔ Physics
Sorry Dr. R i didn't get a ticket it was a question that a bunch of drunk men were arguing about at the bar i work at
2007-06-30 12:07:46 · update #1
Let the radius of the tire be 250 mm.
If the radius decreases by 5mm, ( worn-out tire)
the reduction in the speed (5/250) = 2% for the same number of revolutions of the tire.
Meter reading depends upon the number of revolutions per hour only.
Therefore while the meter shows 60 km/h, the actual speed is only 58 km/h.
2007-06-30 19:03:34 · answer #1 · answered by Pearlsawme 7 · 0⤊ 0⤋
New tires will cause the speedometer to read slightly lower at the same speed. If the speedometer originally read high the new tires will result in a more accurate reading. If the speedometer originally read low the old tires give a more accurate reading.
2007-06-30 22:05:05 · answer #2 · answered by cityslicker42 5 · 0⤊ 0⤋
Just pay the ticket. The judge will never buy it.
Re follow up. Sorry, I was just joking and forgot the smiley :-)
The speedometer actually measures the rotation rate of the wheel directly. A smaller wheel means more turns per mile, so it'll read too high as it ages. It's calibrate to be accurate for a new OEM (original equipment manufacturer) wheel.
2007-06-30 18:48:08 · answer #3 · answered by Dr. R 7 · 0⤊ 1⤋
The speedometer reading is not taken from the car wheels, it's taken from the engine shaft.
However, the larger diameter of the tyres will give a little more distance than the milometer reading indicates.
2007-07-01 01:49:43 · answer #4 · answered by Norrie 7 · 0⤊ 0⤋
Tire diameter grows smaller with wear. Ground speed will be less than speedo' reading indicates and if tires are replaced with same size as original equip' speeds will equal readings.
2007-06-30 18:21:30 · answer #5 · answered by Anonymous · 0⤊ 0⤋