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.
Check out the rest of the June digital edition of Fleet Equipment here.