Energy tires has become very important becuase with the goverment requirements for better fuel consumtion. The rolling resistance is performance charactoristic and energy tires have be low rolling resistance. The general ideas change to improve tires to energy tires but will certainly affect other properties as well , for better or for worse.
Effect of Rubber Material
ranked various rubber material regarding their effect on energy tire (low rolling resistance) . The rolling resistance index was as the table
| Rubber material | rolling resistance index |
| Natural Rubber | 100 |
| Hight cis-BR | 94 |
| Solution SBR | 93 |
| Emulsion SBR | 90 |
| IIR | 73 |
* high rolling resistance index indicated that low rolling resistance coefficient.
Energy Tires Design
Energy tires can be radial construction that it have better rolling resistance than bias construction becouase the radial carcass is more flexible. Energy tires can reduces the gauge thickness of tread to reduce energy dissipation to lead to poorer rolling resistance.
Loading
Energy tires rolling resistance improves when tire’s load is decreased
Inflation Pressure high or low?
To design energy tires to operate with a higher air pressure.
Vihicle Speed.
Energy tires rolling resistance improves when vehicle speed is decreased.
Running Temperature.
Tire’s running temperature has effect on impart rolling resistance. Lower running
temperature may impart more rolling resistance.
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