Goodyear said Friday the 2010 Toyota Prius now includes its fuel-efficient tire, Assurance Fuel Max, as standard equipment.

The Assurance Fuel Max features a fuel-saving tread compound that helps reduce energy loss during use, the Goodyear Tire & Rubber Co. said.

The tire also is available for the 2010 Ford Fusion S and 2011 Chevrolet Volt.

As a strategy to boost sales, Goodyear, based in Akron, Ohio, has said it will step up new product offerings, including its Assurance Fuel Max tire that was introduced in February.

Shares fell 40 cents, or nearly 3 percent, to $14.05 in afternoon trading.