Vancouver 4 Wheelers

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Calculators

Ok, so you got a lift and slapped on bigger tires?! They look tough and could be very functional, but they could be robbing you of power/gas mileage. This calculator will help you find a gear ratio that make your rig perform close to stock specs.  

 Find new Gear Ratio with new tire size

Old Tire Diameter:

New Tire Diameter:

Current Gear Ratio: New Gear Ratio:

 

Now that you got those new tires, your speedometer is off. Uses this simple ratio calculator to approximate your correct speed.

 Speedometer Converter

Original Tire Diameter: 

New Tire Diameter: 

Speedometer Reading (M.P.H.):  Corrected Speed (M.P.H.):

 

Crawl Ratio. The one number everyone wants to know. This is for bragging rights afterall. Only number more important than this is your checking account balance. You'll need to do a little research by finding out the transfer case and transmission ratios first.

 Find Overall Crawl Ratio

Transmission Ratio:

Transfer Case Ratio: 

Axle Ratio: 

Overall Ratio:

 

Estamates your actual MPH. Knowing your gear ratios and tire size will get a more accurate result.

 Find M.P.H.
RPM:    Tire Diameter: Axle Ratio:      
Transmission Ratio:                  TransCas Ratio:
M.P.H.: 

 

If you don't have a tachometer you could use this form, otherwise it's only useful to find out how accurate your Tach is.

 Find RPM

M.P.H.:                

Axle Ratio:                

Transmission Ratio:  

Transfer Case Ratio:        

Tire Diameter:      

RPM: 

 

Convert those metric tires that are common on just about everything stock to a number you can understand. For example a 265/75R16 would be around 31.6 inches tall.

 Convert Metric tire to Standard
Example: 195/75R15
Tire Diameter:
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