2-Pack SPINGO TPU Inner Tube 700C x 23C-32C/ 35C-43C with Metal Valve Ultralight Tubes 48mm/60mm/80mm Presta Valves, Road Bike & Gravel Portable Spare Tire for Training and Cycling

【Metal Valve, Built for Gravel】 Tougher than plastic and more reliable on rough terrain, the lightweight metal valve resists bending and breakage while maintaining a secure seal. The removable valve core makes inflation quick and easy, so you're always ready for the next adventure. 【Portable & 60g Ultra-Light】: SPINGO TPU tubes can Pack down to 4.45in × 1.38in × 1.18in, making it far more portable than traditional butyl tubes—easy to stash in a saddle bag or jersey pocket. At just 60 grams, this TPU inner tube 700c saves up to 110g per wheel vs butyl inner tubes for better handling, faster climbs, and a smoother ride. 【Size Compatibility】: Spingo Ultra-Light TPU Inner Tube 700c fits road bike tires from 32c to 4c (35c / 38c / 40c / 42c / 43c). One lightweight TPU inner tube covers multiple sizes, making it an ideal replacement tube for road cycling, racing, and daily training. Fully compatible with rim brake and disc brake systems, it delivers reliable performance in all riding conditions. 【Upgrade TPU Material】: The Spingo TPU Tube 700c is up to 70% lighter than traditional butyl, reducing rotating weight for faster acceleration and climbing. A smart upgrade from butyl, this lightweight road bike inner tube offers excellent air retention, durability, and a compact design, delivering race-level performance with everyday value for road racing, training, and high-speed riding. 【Easy Install】: SPINGO TPU tubes match the 700c road bike tire size, check rim tape, and remove debris inside the tire. Slightly pre-inflate (max 0.5 PSI), insert the Presta valve straight, tuck the tube evenly (no twists), and mount the bead slowly to avoid pinch flats. Check both sides for any tube showing before inflating. Never exceed 5 PSI outside the tire. Need help? Message us anytime for support.