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Old Aug 29, 2018 | 01:14 PM
  #28 (permalink)  
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GraphiteGhost
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Joined: Jul 2009
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From: Central South Carolina
Default Re: Tire size/Speedometer accuracy

Originally Posted by HanksDad
Interesting reading, but I did not find my answer.
The Corpus Christi TX-area Deputy insisted he clocked me at 82 mph today. My cruise control was set to 78. My tire sizes are exactly as called out in the owners manual, so my question is - is the speedo on the 05 Crossfire prone to reading 5 mph off? Need to know to keep my daughter ticket free.
First time in 45 year of driving I have ever told a cop I didn't believe his radar. I've been pulled over more in the last 4 weeks than I have in the last 15 years. Cops sure like pulling it over. Cop said, "It looks fast.", so I showed him when I drove off that it was. He followed me for another 10 miles.


Find a long straight road and set cruise control to 60mph. Time one mile, it should read one mile per minute. If you time it for 5 minutes, it will give you a much closer reading of actual speed (the more miles/minutes the more accurate). Make sure you set CC right at 60 and don't do it on a hilly or twisty road. Good luck!

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