Duro Tire 20x4.25 Boomerang Fat Bike Tire, Semi Slick Beach Cruiser Chopper Fat Bike Tire Duro Tire's 20x4 1/4 semi slick Boomerang fat bike beach cruiser tire is in a class all by itself. The extra wide tire casing is built purposefully to help guide your ride through soft terrains like sand and beach instead of digging in, and you'll feel the difference when cruising down the road. The semi-slick design helps you glide easy without the rumbling and bumbling of knobby tread designs. Single 20x4 1/4 Duro Boomerang slick cruiser chopper bike tire Extra wide tire casing purposefully designed to help stay above soft surfaces like sand. Semi-Slick tread allows you to cruise the streets without the rumbling and bumbling of knobby designs. The Boomerang is designed for comfort, stability, and durability. Air Pressure 35 PSI, 2 BAR, Wire Bead, 60 TPI, Weight 1350 g