Designed specifically for the unique demands of modern utility and cargo e-bikes, the Satyr Inner Tube provides the ultimate heavy-duty reliability your ride requires. Whether you are transporting groceries, tools, or passengers, this tube is built to handle the pressure. Key Features Perfect Cargo Fit: Specifically sized at 22" x 1.75-2.125 to perfectly match specialty cargo wheel configurations like the Rad Power Bikes RadWagon. Tannus Armour Ready: Engineered with an optimal shape and thickness to fit seamlessly with Tannus Armour inserts for maximum flat protection. Premium Butyl Rubber: Crafted from high-grade butyl compound to ensure excellent air retention, high elasticity, and superior resistance to pinch flats. Standard Schrader Valve: Features a durable, standard Schrader valve for easy inflation at home or any gas station pump. Keep your cargo moving safely and smoothly. Switch to Satyr for a dependable, high-load inner tube that keeps down-time to an absolute minimum.