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Off Road Innovations - Communications

Gear Ratio also solve for MPH or RPM

Tire Diameter:   Tranny Ratio:
  Crawl
  
  Ratio
Diff Ratio:   Transfer Case Ratio:
RPM:   MPH:

Tire Size Change, find new differential ratio.

New Tire Diameter:
Old Tire Diameter:
Current Gear Ratio:

  Actual
  
  Ratio
Hi Ratio:
New Ratio:
Lo Ratio:
 

Metric Tire to Inches Conversion

Example: LT235/75R16 = 30"
LT / R = Diameter ''
Section Width: ''    Section Height: ''

Ring and Pinion Ratio Using Tooth Count

# Ring Gear: # Pinion Gear: = Gear Ratio:


Speedometer Check

Orig Tire Dia:
New Tire Dia:
Speedometer:
Actual: