Speedo off that much?
#21
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Originally Posted by callmej75
Well the old lady was out last night and got pulled over doing 51 in a 35 The cop said most of it was probably due to the bigger tires but I said it wouldn't be off much to accomodate her on her grand appearance in court. I just used 4crawlers speedo calibrator to see just how far it would be off and stock tire size is 225's and I got 31's on there now and it said almost 5mph off Does this sound right? I did tell her it was coming out of her paycheck to cover the ticket and extra insurance fees
IF the speedo was accurate with stock tires, here's what it would read now:
Indicated 35mph would actually be 38.75
Indicated 31.6mph would actually be 35.
For it to read 35 and actually be going 51 you would need 40" tires.
And it will make no difference to the Judge whether the tires affected the speedo or not - WHY she was speeding doesn't alter the fact that she was speeding and you(she) are responsible for the equipment on the car you drive. IN other words - you can't prove it's not your fault.
#22
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https://www.yotatech.com/forums/show...ghlight=speedo
theres some info in this thread i made when i had this same problem.
theres some info in this thread i made when i had this same problem.
#23
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Probably won't help with the court - other than to debunk the cop IF he says he only pulled her over because he thought her tires were oversized. Unlikely though, since he has her on radar.
But you CAN prove to HER her it's not the tires fault (not your fault in other words..lol ) and that she was indeed speeding....
Your speedo error should be 5% (based on the tire change 28s v. 31s)
35mph indicated + 5% = 38.75 actual speed.
But you CAN prove to HER her it's not the tires fault (not your fault in other words..lol ) and that she was indeed speeding....
Your speedo error should be 5% (based on the tire change 28s v. 31s)
35mph indicated + 5% = 38.75 actual speed.
#24
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Originally Posted by Flamedx4
Probably won't help with the court - other than to debunk the cop IF he says he only pulled her over because he thought her tires were oversized. Unlikely though, since he has her on radar.
But you CAN prove to HER her it's not the tires fault (not your fault in other words..lol ) and that she was indeed speeding....
Your speedo error should be 5% (based on the tire change 28s v. 31s)
35mph indicated + 5% = 38.75 actual speed.
But you CAN prove to HER her it's not the tires fault (not your fault in other words..lol ) and that she was indeed speeding....
Your speedo error should be 5% (based on the tire change 28s v. 31s)
35mph indicated + 5% = 38.75 actual speed.
#25
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Originally Posted by callmej75
Makes sense...is this anywhere in writing that maybe I can print up so she can show the court?
There are tons of documents on the web for this stuff, just google for it.
Here's some: http://www.thecarconnection.com/Enth...277.A3527.html
http://www.vclassics.com/archive/speedotip.htm
If you don't want to figure it out -
Here's a percentage calculator for the math impaired. http://www.webcalc.net/calc/0787.php
Here's a tire size/ speedo calculator. http://www.paspeedo.com/calculator.htm
The tire diameter database they use doesn't work very well. Be aware of it when puttting in your numbers.
Here's a calculator for timing mile posts to determine actual speed. http://www.bryanf.com/pc/calc/chassis/pcspeedo.htm
There are tons of documents on the web for this stuff, just google for it.
#26
Hey ask for all the paperwork when you go to court. Can't remember what it is called to file the motion to get said paperwork...but it should include stuff on whether the cop is up to date on using the radar, radar calibration, etc, etc. The odds are there that one of them is out of date. Heard this on the radio....guy wrote a book about getting out of tickets. Hope this helps...
#27
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It's called a "Motion of discovery". Essentailly means they have to give you everything you need to make your case, whether they were going to use it or not in their case...
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