Zol Mountain Bike Bicycle Inner Tube 27.5″ x1.95/2.125 Presta Valve48mm Review December 1, 2018 Wahooligan No Comments Bike Tires and Tubes Made out of butyl construction Weight 240 grams Presta Valve/French Valve stem 48 mm long Zol MTB tubes are made with high standards for a great balance of durability and lightweight. Post navigation ← Tire 2.50-16 Front or Rear Motorcycle Dual Sport On/Off Road Slightly Knobby (P43) ReviewContinental Double Fighter III Urban Tire Review →