Tires Cycling, Outdoor Recreation, Sports & Outdoors, Tires & Tubes, Zol Zol Montagna MTB Mountain Wire Bike Bicycle Tire 27.5×2.125 Black Review by Coyotea October 4, 2018 No Comments Wire Bead 27 TPI Pressure: 50 PSI Weight 910 Grams Size 27.5×2.125 Zol Montagna MTB Tires Are Tough built with Durability, Puncture Resistance, Traction and Toughness in mind.