Do fat bikes need tire inserts? - Canadian Cycling Magazine
Amazon.com : Tannus Unisex's Armour Puncture Round Protection, high Grip with Low Rolling Resistance, Easy Assembly, Reusable, Free tyre and Tread Selection, red, 20 x 4.0-4.8 : Sports & Outdoors
Amazon.com : Tannus Armour Tire Insert, No Flat Bicycle Tire Insert, Puncture Proof Bike Tube Protector, Stops Flats from Thorns and Goatheads (20" x 1.75-1.95") : Sports & Outdoors