Here is the HUTCHINSON high quality air chamber, in 2 1/4 to 2 1/2 by 17 inches, it is ideal for mounting tires 2 1/4 or 2.25 by 17 inches, 2 1/2 or 2, 50 by 17 inches. We recommend it to those who want quality for their machine, even for speed and sporty driving!