This Sunlite Thorn Res inner tube fits 700x25-28 tires (27x1-1/8 to 1-1/4) and features a 32mm Presta valve with a threaded removable core for easy maintenance. Designed for reliable performance and puncture resistance, it ensures a secure, consistent ride for road and hybrid bikes. The 28mm valve length suits most rims, making it a dependable choice for serious cyclists seeking durability and convenience.