PRODUCT SPECIFICATION: Suitable for mountain bike with wheel diameters of 29 inches and tire widths of 1.9 to 2.5.
HIGH QUALITY PRESTA VALVE: Replaceable air core, high quality aluminum alloy valve with bonnet, high pressure resistant, prevents gas leakage.
DURABLE: High frequency heat welding technology makes the interface flat and tight, tpu material has good puncture resistance, prolonging the service life of the bicycle inner tube.
PORTABLE: Bicycle inner tubes are 70% lighter and 50% smaller than butyl rubber inner tubes, and at only 0.21 lbs, they can be easily carried for unexpected situations. Purple color is more recognizable compared to black.
PLEASE NOTE: Do not inflate the outer tire heavily when it is not mounted, or it will cause irreversible damage! Please feel free to contact us if you have any questions about your purchase or use. We will do our best to solve your problem.