Bridgestone recently announced the successful development of its new “Large & Narrow” concept tire. The new tire is narrower and features a larger diameter (155/55R19) than conventional tires. It was created as a new environmental technology to enable tires to help realize a sustainable society.
The Large & Narrow concept tire technology helps vehicles achieve improved fuel efficiency, thereby contributing to reductions in CO2 emissions. Moreover, the air pressure within these tires is higher than conventional tires, and the design includes new tread pattern and compounds designed specifically for use in these tires.
The new brand of innovative technology employed in the Large & Narrow concept tire enables it to realize significantly lower levels of rolling resistance and substantially higher levels of wet grip performance.
By giving tyres a larger vertical diameter and increasing their internal air pressure, it is possible to limit changes in the shape of the contact patch, the section of the tyre that comes in contact with the road. Further, by optimizing the structure of tires created using this technology and using the most appropriate materials, the company achieved a rolling resistance coefficient that is approximately 30% lower than conventional sized tires (175/65R15).
Further, making tires narrower reduces air resistance, a major factor that needs to be considered when working to improve fuel efficiency. Due to these features, tires that employ this new technology are able to boast levels of fuel efficiency exceeding those of the fuel-efficient tires Bridgestone has already put on the market.