Schwalbe's best selling model. The most puncture resistant pneumatic tire there is. In addition to the superior puncture protection it features many inner values: Rolling resistance. The patented, 5 mm thick SmartGuard layer, when compared to all generic products, has a significant advantage in rolling resistance. Recycling. Also in the SmartGuard, we use a proportion of recycled rubber from old latex products. „Anti-Aging“ side wall. It now lasts much longer before deveolping unsightly cracks when subjected to use with insufficient air pressure.