TMV Reinforced 3mm Inner Tube 80/100-21" 2.75/3.00 TR4

- Inner tube is flexible and easy to put into a tyre. - Made of high quality Butyl - Do not become hard in winter as Butyl is insensitive to temperature variations. - Very strong valves - High resistance to the pinching - Keep the air pressure very long time because the Butyl is approximately 10 time more airtight than the Natural Rubber - Used by a lot of very good riders since 2008. - Thickness of 3 mm