The "Tread Loss" is, as the name implies, the amount of tread rubber left on a scrapped casing.
It is a useful metric to help a fleet optimize its tire assets.
It is often expressed:
1. In Millimeters or 32nds
2. As a percentage
3. As a monetary value.
1. TREAD LOSS IN MILLIMETERS OR 32nds
The tread loss here is simply equal to the usable tread depth remaining on the tire.
It is calculated as follows:
Tread Loss (mm or 32nd) = Remaining Usable Tread = Average RTD - Pull Point
- If the average remaining tread depth is below the pull point, the usable tread depth remaining is zero
- The "pull point" value used in the report is the one entered prior to run the report in the field shown below:
2. TREAD LOSS PERCENTAGE
As a percentage, it is the ratio between the usable tread remaining (Average RTD - Pull Point) and the original usable tread (OTD - Pull Point).
Tread Loss % = (Average RTD - Pull Point) / (OTD - Pull Point)
3. TREAD LOSS MONETARY VALUE
This is calculated by multiplying the tread loss in mm/32nds by the value of 1mm or 32nds of tread.
- Let's suppose a casing with a cost of 500 USD.
- The tire has an OTD of 13 mm
- The pull point is set at 3 mm
--> The total usable tread is 10 mm.
--> The monetary value is $50 per millimeter.
If this casing has been removed with 8 mm of tread on it, then a total of 5 mm is lost (8 mm - 3 mm).
Therefore the monetary loss is $250 ($50 x 5 mm)
To calculate this value on the report, you need to have entered the new tire (or retread) purchasing cost under the Fleet Profile.