Si 69®: Rolling resistance -25%
Si 69® improves the rolling resistance by about 25 %, and fuel consumption felt by about 5 %. In all key characteristics, this new generation of tires has a significantly better level of performance.
Si 363®: Rolling resistance -35%
Mercaptosilane Si 363® is is the successor of the established polysufur silanes. Compared to these established Silica/Silane- systems the rolling resistance of the rubber compound with Si 363® is further reduced by more than 10-15 percent. In contrast of tires without silica/silane, the rolling resistance drops by about 40-45 percent. Fuel consumption falls by 5 to 10 percent, depending on the basis of comparison.
A valuable advantage, especially if one considers that the EU regulations starting in 2012 will limit and label the rolling resistance of all existing tires.