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What is my RPM for any given speed/gear?

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  #11  
Old 01-29-2010, 03:07 PM
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  #12  
Old 01-29-2010, 03:13 PM
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that's a better chart
 
  #13  
Old 01-29-2010, 03:21 PM
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Originally Posted by bamorris2
Tire diameter is 25.213"
To get a measurement that accurate you must have some big *** calipers!
 
  #14  
Old 01-29-2010, 03:24 PM
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tape measurement
 
  #15  
Old 01-29-2010, 04:46 PM
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Originally Posted by DGDyna
To get a measurement that accurate you must have some big *** calipers!

ROFL... I got that from an online tire calculator.
 
  #16  
Old 01-29-2010, 05:18 PM
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So, you get all these specs and numbers...gonna pull out the calculator while you are riding?
 
  #17  
Old 01-29-2010, 06:09 PM
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Originally Posted by mastery
So, you get all these specs and numbers...gonna pull out the calculator while you are riding?

Heck no. I'm not gonna use a calculator for this! I'm setting up an Excel spreadsheet. So all I have to do is input my MPH, and it'll tell me what my RPM's are. I'm planning on rigging up a 17" HP laptop to my handlebars. And with my voice recognition input, I'll just speak my MPH, and it'll automatically show me my RPM's. Just seems easier and more cost efficient than installing a tach.
 
  #18  
Old 01-29-2010, 06:13 PM
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Sounds like a plan to me.
 
  #19  
Old 01-29-2010, 06:54 PM
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I don't run a speedo or a tach, but when I did I found 2000 rpm in 2nd was 20 MPH (school zone) 3000 in 5th is 70mph, Only 2 I cared about.
 
  #20  
Old 01-29-2010, 08:51 PM
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And to think that for over 40 years I've just been doing all this by the seat of my pants...
 


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