Michelin Aircomp Ultralight A1 inner tube A Michelin bicycle inner tube usually consists of butyl. Butyl is a very elastic and at the same time airtight synthetic rubber. Due to its high elasticity, the Michelin inner tube is suitable for covering a wide range of tire sizes. Specifications: Color: black Gender: unisex Length: 7.9 cm Width: 12.2 cm Height: 12.9 cm Material: latex Weight: 0.1 gram Inch size: 28 Valve type: French valve Valve length: 52 mm Size: 18/23-622 Suitable for inch size: 28 x 0.90 28 x 1.00 28 x ¾ 28 x 7/8 28 x 1 1/16 Suitable for ETRTO size: 18-622 19-622 20-622 22-622 23-622 24-622 25-622 Suitable for French size: 700 x 18C 700 x 19 700 x 19C 700 x 20C 700 x 22 700 x 22C 700 x 23C 700 x 24C 700 x 25C