Need help! SPEEDOMETER

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Old 03-02-2007, 04:51 PM
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Need help! SPEEDOMETER

So i got a tickey for going 67 in a 55 zone. I swear i was going 55 and my v1 was going krazy so i knew for a fact that i did not speed. Anyways, where is a good place to get my speedometer test so i can present this to the judge.
Old 03-02-2007, 04:52 PM
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Ohhh, i have 18's with tire size 225/40/18 i think.....
Old 03-02-2007, 04:55 PM
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from my understanding a 225/40/18 would make the speedo read higher than your actual speed not lower
Old 03-02-2007, 04:57 PM
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i also forgot to say take it to court!!!

the radar gun's calibration may have been off or maybe you he got you before your v1 went off


did the ticket specify radar or laser?
Old 03-02-2007, 04:59 PM
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Originally Posted by SeanS627
from my understanding a 225/40/18 would make the speedo read higher than your actual speed not lower
very true ... the overall diameter of your wheel/tire combo is incrementally smaller than stock, SO (for example) if your speedometer indicates you're traveling at 75mph for instance, you're actually moving closer to 72-73 mph.
Old 03-02-2007, 05:37 PM
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MAn, i swear i was going 55. I don't understand.
Old 03-02-2007, 06:10 PM
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^ that's what they all say, lol
Old 03-02-2007, 08:38 PM
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Maybe the following happened to you:

(from Escort's Website)

How radar makes mistakes
Although traffic radar receives reflected signals from all cars within range, it has no way to display all the different speeds, and no way to even decide which car is traveling which speed. In fact, traffic radar displays only a single number, usually the speed of the strongest reflected signal.

If all vehicles were identical, the strongest reflection would be from the closest car. But different vehicles reflect different amounts of the radar signal. Radar speed readings caused by distant trucks are a common source of undeserved tickets.


Radar's most common error: mistaken identity
Because of this inherent flaw of traffic radar, an officer could be looking at your car while his radar unit is actually clocking the speed of a large truck far down the road - perhaps even out of sight. And since his radar doesn't tell him which vehicle it is reading, the police officer might mistakenly think that you are responsible for the speed displayed. And give a ticket to you instead of the truck driver.

More than a dozen technical errors for traffic radar have also been documented, but mistaken identity (technically called a "target identification error") is by far the most common.
Old 07-17-2008, 11:20 PM
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I would def. suggest taking it to court also. From personal experience I have had an officer mistake me in one of my cars as speeding when I was definately not. I was driving with my mom in the passenger seat, and as I was being pulled over a different car moved over because they were speeding but when the office passed them they came right back into the road. I contested the ticket and drove 2 hours to go to court...and lost. It was a terrible experience because the judge doesn't care what happened as long as the officer shows up. Since then I have read about some strategies for fighting tickets, and your best bet would be to try to fight it first by letter. I don't know if where you are from allows this, but is is kind of like a free try. In California, if you lose the "hearing" by mail, you are still aloud to request a real trial. It's worth a shot if your time isn't worth more, but the insurance is a bi*** once you get the points. Check out this site, there is some good info on it:
http://www.helpigotaticket.com/
Good luck if you choose to fight it, let us know what the outcome is.
Old 07-17-2008, 11:28 PM
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If you are sure that you were not speeding, fight it. Before you go up in front of the judge, ask for calibration record for the radar/laser gun. And make sure that he made visual confirmation of your vehicle. Now days some LEA uses guns that actually take pic of your car as it clocks you.
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