CHS: Commercial Truck Dosage Calculations
In order to calculate the dosage requirements for a CHS Commercial High Speed Truck Tyre you need to use the following formula. If you have any queries or need assistance then please contact us.
This Dosage calculation uses Tyre Width (inches) X Tyre Height (inches) X 0.082 = dosage rounded to the nearest USA Ounce.
Tyre Height is (2 x Tyre Width x Aspect Ratio) + Rim Diameter.
1. Example Tyre: Metric
Tyre designation: 295/80R22.5
295 = Tyre Width in millimetres
80 = Aspect Ratio = % of tyre Width that each Sidewall is tall
22.5 = Rim Diameter in inches
2. Example Tyre: Non- Metric
Tyre Designation: 11R22.5
11= Tyre Width in inches
22.5= Rim Diameter in inches
Note: Aspect Ratio is presumed 100 that is, Width= Sidewall Height.
The Calculator provides for Regular Dosage and Severe Dosage applications (Regular Dosage is multiplied by a factor of 1.25).
Severe Dosages are used where it is expected that the Tyre (s) will be subjected to numerous punctures / injuries- eg Waste or Construction Truck.