The tire verification process for a new tire is rigorous, even by today’s demanding efficiency expectations. A tire must demonstrate that it “has a rolling resistance coefficient at or below the target values (in kg force/metric ton) shown in the table below, using SAE J1269 tire rolling resistance test method (with the conditions established in table 3 of SAE J1269) or the ISO 28580 rolling resistance test method,” according to the EPA.
Other SmartWay Verification notables:
- For multi-position tires, if the tire qualifies for verification as a trailer tire, it qualifies for verification at all positions.
- If it qualifies for verification as a steer tire, it also qualifies for verification as a drive tire.
- A minimum sample of three tires are tested. The average rolling resistance coefficient of the sample is the value to be compared with the target values.
- ISO28580 test results are expressed on the basis of a 2-meter test drum.
For full details on SmartWay verification, visit the EPA website here.
Read our full story on SmartWay verified tires here.
Check out the rest of the June digital edition of Fleet Equipment here.