The SSR system is a runflat technology developed by Continental especially for low section tires, which still keeps the tires compatible with all standard rims.
The SSR principle is based on a self-supporting reinforced sidewall. In case of a puncture, this prevents the sidewall from being crushed between the rim and the road, and the tire from slipping off the rim, which makes a spare tire obsolete. Not having to carry a spare tire means a reduction in weight, which improves fuel efficiency. It also adds up to 80 litres of free space in the trunk. Fitting on four positions is highly recommended, if not yet mandatory by law and a tire repair is not allowed.