THE NEW PUNCTURE COVER. After 10 years, we have reviewed the Marathon Plus. The only truly puncture-proof tire now has a new dynamic profile and incorporates many internal enhancements. ROLLING RESISTANCE. The patented 5mm SmartGuard layer has significant rolling resistance advantages when compared to generic products. And we have increased your lead in the latest version. RECYCLING. Also in the SmartGuard, we use a part of recycled rubber from latex products. FLANK "ANTI-AGE". Now lasts longer before developing negligible cracks when used at too low pressures. Ready for the electric bike. The main sizes have been tested and approved for electric bikes up to 50 km / h. Weight 995 gr FILTER: URBAN FILTER: 26 FILTER: 1.75 FILTER: RIGID