INTERACTIVE CALCULATORS
provided by www.4lo.com
Gear Ratio also solve for MPH or RPM
Tire Size Change, find new differential ratio.
Metric Tire to Inches Conversion
Ring and Pinion Ratio Using Tooth Count
Speedometer Check

Gear Ratio also solve for MPH or RPM
Tire Diameter:   Tranny Ratio:
  Crawl
  
  Ratio
Diff Ratio:   Transfer Case Ratio:
RPM:   MPH:
BACK TO TOP

Tire Size Change, find new differential ratio.
New Tire Diameter:
Old Tire Diameter:
Current Gear Ratio:
  Actual
  
  Ratio
Hi Ratio:
New Ratio:
Lo Ratio:
 
BACK TO TOP

Metric Tire to Inches Conversion
Example: LT235/75R16 = 30"
LT / R = Diameter ''
Section Width: ''    Section Height: ''
BACK TO TOP

Ring and Pinion Ratio Using Tooth Count
# Ring Gear: # Pinion Gear: = Gear Ratio:

BACK TO TOP

Speedometer Check
Orig Tire Dia.
New Tire Dia.
Speedometer:
Actual:  
BACK TO TOP