Foam-based tire insert designed for tubeless tires to protect the rim, provide more grip, and prevent punctures. The Air Liner Light is super lightweight (50 g) and enhances the performance of the wheel-tire system for cross-country, down-country, and trail applications. It is compatible with mountain bike tire sizes from 29 x 2.1" to 29 x 2.4", with rim widths of 25 - 30 mm, and with any type of liquid sealant. It should only be used in combination with tubeless tires and tubeless multi-way valves. The package includes one Airliner and a 40 mm Vittoria Green Multiway Tubeless valve. The design of the Air-Liner Light increases side stability in corners, allowing you to handle the most extreme turns at higher speeds.