The Specialized Thorn-Resistant Schrader Valve Tube is a butyl-rubber inner tube engineered to reduce flats without adding unnecessary weight. It features a dual-thickness design with a thicker outer wall to resist punctures from thorns and debris, and a thinner inner wall against the rim for weight savings. The 40 mm Schrader valve allows easy inflation, and the tube is optimized for 29 × 1.75–2.4 in mountain bike tires.

• Compatibility: fits 29 × 1.75–2.4 in tires
• Butyl rubber construction for durability and air retention
• Outer wall thicker to resist thorn punctures
• Inner wall thinner to minimize weight
• 40 mm Schrader valve stem
• Foldable, tube-type design