🚴 IMPROVE SPEED AND PERFORMANCE: The 700c inner tube weighs only 28g, significantly lighter and more compact than a regular rubber inner tube weighing 150g. This reduces the weight of your tires and minimizes rolling resistance, where rotational mass has the most impact (wheelsets), thus improving both speed and performance. Additionally, it’s much easier to store and transport due to its compact size. IMPALAPRO Ultralight Road Bike TPU Inner Tube 700C 28g 0.2mm Thick Compatible with 700x18/23/25/28/30/32C Presta Valve 45/65/85mm -Bicycle Inner Tube 700C (1Pc Valv 65mm)