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December 09, 2013 01:00 AM

Bridgestone upgrades "Air Free' concept tire

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    TOKYO—Bridgestone Corp. has upgraded its “Air Free” non-pneumatic concept tire with improved load-bearing and speed capabilities and reduced rolling resistance.

    Bridgestone debuted the second-generation Air Free during the 43rd Tokyo Motor Show. The concept tire is mounted on a 900-pound, two-passenger compact city car capable of a maximum speed of 36 mph.

    The speed capability is a 10-fold increase over the first-generation Air Free, which Bridgestone showed at the 41st Tokyo Motor Show in 2011.

    The second-generation Air Free uses spokes made of an undisclosed thermoplastic resin running parallel to each other at roughly a 45-degree angle, connecting the hub to the outer rim/tread structure. The spokes of the first generation Air Free intersected, forming a honeycomb-like structure.

    Bridgestone claims the materials used in the Air Free are recyclable which, when combined with the product's reduced low rolling resistance properties, make it particularly environmentally friendly.

    The Tokyo-based tire maker said it is pursuing this development in order to achieve a “cradle to cradle” process of producing new tires from worn tires.

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