Set of 2 All Terrain Tires with 2 Inner Tubes .Primo High Performance Tire 24 X1 3/8″, 37-540 , V-Trak Knobby, C763 tread pattern, Gray color with black walls. The maximum air pressure is 65 PSI. California Proposition 65 Warning⚠ WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov