ANVELOPA SCHWALBE MARATHON PLUS PERFORMANCE SMARTGUARD TWINSKIN 25-622 NEGRU The Schwalbe Marathon Tires incorporate light-reflecting sidewalls for better visibility and also utilizes a Silica compound for easy rolling and longer life. The five millimeter thick Smart Guard puncture protection belt made from special india rubber that in conjunction with the tread and carcass brings the total to almost a centimeter of material between the tube and road. For example a thumbtack will remain lodged in the rubber and cannot penetrate. Smart Guard also protects against the biggest puncture problems experienced by everyday cyclists. Objects that embed in the tread and that insidiously work their way through even the most sophisticated puncture protection belt, promoted by the constant rotation of the tire on the road. Other puncture protection inserts increase rolling resistance, but the Marathon Plus with Smart Guard runs as easily as a tire without a protection belt. Pointed or sharp objects stand little chance of penetrating the tire.The approximate 200 gram extra weight compared with the 'classic' Marathon is hardly noticeable in everyday use. Advantages: - low rolling resistance, - high mileage, - modern, easy-rolling tread, - standard 3M-Reflective line - diamond textured shoulders for good cornering and - a tread compound, less inclined to harbor foreign bodies (pieces of broken glass, flints and shards). Features: SmartGuard puncture protection to resist thorns, shards and even thumbtacks Marathon Silica compound for easy rolling and longer life Reflex sidewalls incorporate light-reflecting bands