NASCAR teams have the option of using these green-labeled tires during Saturday’s all-star race at Charlotte Motor Speedway in Concord. The tires, softer and grippier, could provide more speed.
NASCAR teams have the option of using these green-labeled tires during Saturday’s all-star race at Charlotte Motor Speedway in Concord. The tires, softer and grippier, could provide more speed. Jeff Siner jsiner@charlotteobserver.com
NASCAR teams have the option of using these green-labeled tires during Saturday’s all-star race at Charlotte Motor Speedway in Concord. The tires, softer and grippier, could provide more speed. Jeff Siner jsiner@charlotteobserver.com

NASCAR All-Star drivers say ‘Option’ tires are faster, but by how much? For how long?

May 19, 2017 08:13 PM

UPDATED May 19, 2017 10:13 PM

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