Kenda K50 tires are all purpose tires with short knobbies. FEATURES *Classic design for replacement and repair *Intended Use: BMX *ISO Diameter: 203 / 12.5" *ISO Width (mm): 44 mm *Labeled Size: 12 1/2 x 2 1/4 *Tire Bead: Steel *Tire Diameter: 12.5" *Tire Type: Clincher *Weight: 316 *TPI: 22 *Flat Protection: Sidewall *PSI: 40