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Speedometer Accuracy ?

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Old Jan 12, 2006 | 02:30 PM
  #26  
Brian MP5T's Avatar
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Originally Posted by Doc
I have one I run with, it connects to my watch. My speedo is accurate according to the GPS I have. My watch is an Ironman, I think the whole setup cost me $250. There is a pic in the gallery with the GPS unit on my arm. I used it when I ran a half-marathon.
Neet toy,

My wife has a Garmin that she puts in her "Camelback".

She Resets the Trip Odometer to ZERO and goes for a run. It reads to then nearest Meter...
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Old Jan 12, 2006 | 03:26 PM
  #27  
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From: RTP, NC
I have a Garmin GPS V and it's great. It's about the oldest GPS on the planet but it still can autoroute

Anyhow my Speedo reads about 3 mph more than the GPS says.
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Old Jan 12, 2006 | 03:32 PM
  #28  
Brian MP5T's Avatar
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Originally Posted by zinner
I have a Garmin GPS V and it's great. It's about the oldest GPS on the planet but it still can autoroute

Anyhow my Speedo reads about 3 mph more than the GPS says.
Are you on the stock tires or winter treads. I find it makes a big diference sometimes.
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Old Jan 12, 2006 | 03:39 PM
  #29  
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From: RTP, NC
Originally Posted by Brian MP5T
Are you on the stock tires or winter treads. I find it makes a big diference sometimes.
No snow here!

Stock wheels and tires.
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Old Jan 12, 2006 | 03:59 PM
  #30  
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Originally Posted by zinner
No snow here!

Stock wheels and tires.
Dude, I miss read,, New-Maryland
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Old Jan 12, 2006 | 04:20 PM
  #31  
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I have a GPS unit as well. My spedo is usually a couple mph faster than what the GPS read. I was thinking that maybe the GPS may be wrong, but now may be thinking that the spedo is wrong. I cant remember how many mph it was off with the stock tires but either way its only usually off by a couple mph.
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Old Jan 12, 2006 | 04:48 PM
  #32  
Brian MP5T's Avatar
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Originally Posted by snowcrash
I have a GPS unit as well. My spedo is usually a couple mph faster than what the GPS read. I was thinking that maybe the GPS may be wrong, but now may be thinking that the spedo is wrong. I cant remember how many mph it was off with the stock tires but either way its only usually off by a couple mph.
The GPS is measured down to the first decimal for speeds. I would trust it over the speedo..
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