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PostPosted: Mon Mar 12, 2018 2:36 pm 
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Location: Southern California & AZ
TECHNICAL BULLETIN 3-12-18
NASA Section Width (NSW) versus Listed Tire Size in ST1-4/TT1-4 classing


6.5.2 Modification Factors


Tire Size: NASA Section Width 266mm or smaller (DOT-approved)
Or any currently produced size 245 or smaller = +0.6
NASA Section Width 267mm to 282mm (DOT- approved)
Or any currently produced size 275, 245 or smaller = +0.3
(Note: Deletion of the use of labeled tire size is probable within 6 months)


Clarification: If a DOT tire is compliant with the NSW section width tool, the Modification Factor applies, regardless of the tire size printed by the manufacturer on the tire.
(example: if a tire fits the 266mm measurement tool, but the tire is listed as a "275" by the manufacturer, the + 0.6 Modification Factor does apply).



_________________
Greg Greenbaum
National TT, PT, & ST Director
Nat. Medical Director
greg@nasa-tt.com


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