WTB Nano Air TPU Tube The tube of the future. How do you make an inner tube lighter, pack down smaller, and also more durable than a butyl rubber tube? The WTB Nano Air TPU tube is designed to check all three of those boxes. This lightweight and durable Thermoplastic Polyurethane tube is designed to be the perfect tube to bring along on your next road, gravel, or MTB ride just in case your favorite tubeless setup lets you down. The Nano Air TPU Tube is up to 50% lighter than most standard butyl tubes, offers better air retention than a butyl tube, and is dramatically more durable, too. Whether you're bringing it along as a spare, or upgrading the tubes on your favorite non-tubeless bike, the WTB Nano Air TPU Tube is the tube of the future. Features Thermoplastic Polyurethane construction with increased durability compared to a standard butyl rubber tube Ultra-compact and lightweight design with up to a 50% weight savings compared to butyl rubber Increased air retention lets you spend less time topping off your tires Increased puncture and abrasion resistance in a compact, lightweight package Includes TPU patches just in case SPECIFICATIONSValve Type Presta Weight35g (700x18-32), 49g (700x32-47), 80g (29x1. 95-2. 5") | Wtb | Nanoair Tpu Tube 700 X 18/32 | Tan | 48Valve | Rubber