SmartWay Verified
            Low Rolling  Resistance Tires
                     Performance Requirements
       SmartWay
       MENTAL PROTECTION AGENCY^
                               Tire Verification Process
U.S. ENVIRONMENTAL PROTECTION AGENCY
       SmartWau
 Technology Verification
 EPAs Technology Assessment
 Center develops test protocols,
 reviews strategies and verifies
 the performance of vehicles,
 technologies and equipment
 that have the potential to reduce
 greenhouse gases and other air
 pollutants from freight trans-
 port. The program establishes
Tire manufacturers must demonstrate that a tire model 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.
+  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 veri-
   fication as a steer tire, it also qualifies for verification as a drive tire.
+  A minimum sample of three tires is to be tested. The average rolling
   resistance coefficient of the sample is the value to  be compared with
   the target values.
+  IS028580 test results are expressed on the basis of a 2 meter test
   drum. If a drum of a different diameter is used, the rolling resistance
   is corrected to a 2 meter drum diameter as described in section 9.3
   ("Drum Diameter Correction") of the IS028580 test method.
+  SAE J1269 results can be expressed in the following ways::
credible performance criteria ^H
and reviews test data to ensure ^1
that vehicles, equipment and ^1
^^^^1
technologies will help fleets ^H
improve their efficiency and ^1
reduce emissions. ^1
This fact sheet describes the ^1
SmartWay tire verification ^1
-> ^^^^H
process, which became effective ^H
March 31,2011. ^1
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» The average of the five test points as established in table 3 of the
Ji269 test method.

» Test Point 2, as established in table 3 of the J1269 test method, or
» The "Application Test Point," which represents the maximum load
and typical inflation pressures used on the road. The Application
Test Point result is determined as follows:

Use the test conditions as established in Table 3 of the J1269
test method to obtain rolling resistance force, load, and infla-
tion pressure for each test point.
Calculate the coefficients for regression equation 8 of the
J1269 test method.
Using the coefficients and equation 8, calculate the rolling
resistance force (Fr) for a load of either 4,250 pounds and an
inflation pressure of 100 pounds per square inch (psi) (drive
or trailer tires) or 6,000 pounds and an inflation pressure of
no psi (steer tires). Single-wide drive and trailer tires are to
be tested with a load of 8,soo Ibs and an inflation pressure of
100 psi. The rolling resistance coefficient (Crr), in kg/ton, is
calculated as follows:
Crr = (Fr/Load) xl,OOO
EQUIVALENT TARGET VALUES
(Rolling Resistance Coefficient in kg force/metric ton)
H Steer Drive Trailer
J1269 Application Test Point (1.7 meter drum) 6.6 7.0 5.5

J1269 Test Point 2 (1.7 meter drum) 6.7 6.9 5.5
J1269 5 point average (1.7 meter drum) 6.9 7.0 5.6
ISO 28580 (2 meter drum) 6.5 6.6 5.1
U.S. EPA SmartWay | EPA420-F-12-024 | www.epa.gov/smartway

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