Calculator

Ride On Venezuela En Español
Select your vehicle type:
For Metric Tires
Input the tire dimensions below:
Tire Size Aspect Ratio Wheel Diameter
Regular Dosage :
 Severe Dosage :
For Non-Metric Tires
Input the tire dimensions below:
Tire Width (in) Tire Height (in)
Regular Dosage :
 Severe Dosage :

Commercial Truck Dosage Calculations

In order to calculate the dosage requirements for a commercial truck tire you need to use the following formula.
Please email us each tire size that you find that is not in our dosage table so that we can add it to future versions.

Width (in.) X Height (in.) X .082 = dosage round to the nearest ounce
For severe applications multiply by 1.25

Sample Tire: 295/80R22.5
295 = tire width in millimeters
80 = aspect ratio = % of tire width that each sidewall is tall
22.5 = wheel diameter in inches (in)

To convert from millimeters to inches multiply by .0393

Example:
Width = 295 x .0393 = 11.6 inches
Height = 11.6 inches x .80 x 2 (two sidewalls) + 22.5 = 41.1 inches

Dosage = 41.1 x 11.6 x .082 = 39 ounces
Severe dosage = 39 x 1.25 = 49 ounces


Ride-On (TPS) is tire pressure monitor sensor (TPMS) friendly in TPMS sensors that are hermetically sealed. Please check www.ride-on.com/tpms for more details.