Material: The CST bicycle tube is made predominantly of Butyl rubber, which is known for its high elasticity and airtight properties.

Compatibility: The inner tube is suitable for tires with various inch sizes, including 12 x 1.75, 12 x 1.90, 12 ½ x 1.75, 12 ½ x 1.90, 12 x 2.00, 12 x 1.95, 12 ½ x 2 ¼, and 12 ½ x 2 ¼. It is also compatible with tires with ETRTO sizes of 47-203, 50-203, 54-203, 57-203, and 62-203.

Valve Type: The inner tube features a Presta valve (Sclaverand) with a length of 40mm and a diameter of 5.9mm. The maximum valve pressure is 15 bar, so it’s important to keep the maximum tire pressure in mind when inflating the tube.

Brand: The inner tube is manufactured by CST, also known as Cheng Shin Tire, a reputable brand in the cycling industry.

Category: The CST bicycle tube falls under the category of inner tubes and is designed for use in bicycle tires with a wheel size of 12 inches.

Group: The inner tube is part of the inner tube group, and its size is specified as 12 ½ x 2 ¼-210.

Specifications: The inner tube features a Presta valve with a length of 40mm (SV 40MM) and is designed for use with the CST 12-inch wheel size (Type: 12).