Schwalbe SV21+AP Air Plus

"The Schwalbe AIR PLUS bicycle inner tube Nr. 21+AP is the ideal choice for anyone who values reliability and durability. Specially developed for 27.5 inch bicycle tires (ETRTO 54/70-584), this inner tube offers an impressively large volume. Thanks to its increased wall thickness, the air stays in the inner tube for longer, which means that re-inflation is required less often."
"Another advantage of the Schwalbe AIR PLUS is its excellent puncture protection. The robust construction effectively protects against punctures and other damage that can occur during the ride. This ensures a safe riding experience, whether on the road or off-road."
"With the Schwalbe AIR PLUS bicycle inner tube, you not only enjoy a longer service life, but also a significant reduction in maintenance costs. The quality and reliability of this inner tube make it the first choice for demanding cyclists who do not want to compromise."