A low profile Street/Ramp tires designed to handle anything. Knurled surface and low weight. Material: quality rubber compound   Size: 65 psi, 20" x 2.2" 65 psi, 20" x 2.25" Max Pressure: 65psi   Features:   smooth tread pattern  knurled for improved traction 65psi rated designed by SALT (exclusive tread) Weight:  20" x 2.2" : 658g (23.21oz : 1.45lbs) 20" x 2.25" : 758g (26.73oz : 1.67lbs)