The Schwalbe Aerothan MTB is an extremely lightweight and highly puncture-resistant bicycle tube with low rolling resistance for intensive use. The robust tube remains extremely stable and secure even at low air pressure. Aerothan tubes are made of 100% thermoplastic polyurethane (TPU) up to the valve and are fully recyclable. **Advantages of the Aerothan TPU Tube** - Consistently lightweight up to the valve (up to 40% lighter than comparable Schwalbe Extralight butyl tubes) - Minimal rolling resistance (up to tubeless level) – maximum riding dynamics - High puncture protection - Extremely heat-resistant - Stable riding behavior – even at low air pressures - Easy installation – without slipping or pinching - Made in Germany - 100% recyclable **Features** - No. 21E suitable for MTB tires from 27.5 x 2.10 to 27.5 x 2.40 inches and 26 x 1 1/2 x 2 inches (ETRTO 54-584 to 62-584) (French 650B x 54 to 57 / 650B) - Valve: SV (Sclaverand/French valve) – 40 mm length - Weight 83 g **Scope of Delivery** 1 x Schwalbe Aerothan bicycle tube 27.5" MTB - NR. 21E