Dunlop-Falken-Sumitomo tire research progress
http://techon.nikkeibp.co.jp/english...071026/141408/
sample quote:
"The tread rubber is required to keep the rolling resistance low while maintaining high grip performance. The company developed a plant-derived modifier that improves flexibility of rubber. As a result, the company succeeded in creating a tire with high grip performance and low rolling resistance."



