The Carlisle Thorn Resistant Bicycle Tube is designed for 27-inch wheels with a 1 1/4-inch size. Made of durable rubber, this tube is specifically designed to be thorn resistant, offering increased protection against punctures. The Schrader valve type and 32mm valve length ensure easy inflation and reliability. This white and blue tube comes in a set of one, making it a convenient and essential accessory for any cyclist looking to enhance their ride.