2 x Schwalbe Inner Tubes - 16" x 1.75 to 2.50 (Fits all 16" x 1.75, 1.90, 1.95, 2.0, 2.1, 2.125, 2.25, 2.35, 2.50) - Schrader Valve - PAIR - FREE SHIPPING! FREE VALVE CAP UPGRADE WORTH $4.99! [No. AV3] TWIN PACK - 2 x Premium quality Schwalbe inner tubes direct PUNCTURE RESISTANCE - Higher quality butyl rubber gives better protection SUPER AIR TIGHT - Less requirement to re-inflate unlike other tubes SKYSCAPE METAL VALVE CAPS - 3x Higher air retention over plastic caps - Worth $4.99 IN STOCK + FREE P&P - Ready to ship now!