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Old Apr 28, 2003 | 11:15 AM
  #1  
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Broncomule
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From: Mechanicsville
The Formula

Just for those persons who like to do simple math.

3.55 x 336 x 60
____________ = 2308 RPM
31

First number is rear end ratio
Second number is multiplier
Third number is speed
Deviding number is tire diameter
= RPM
 
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Old Apr 28, 2003 | 01:41 PM
  #2  
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The Formula

that'll be handy. thanks.
 
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Old Apr 29, 2003 | 09:44 AM
  #3  
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The Formula

...but use the ACTUAL tire diameter, available for most makes & models on Tire Rack. Most 31x10.50s are actually ~30" tall.
 
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