Kenda KD2 Kwick. Race-optimized super sticky compound heats up quicker for immediate track performance. Silica base provides better wet weather performance and braking in all conditions. Lower rolling resistance combined with natural straight-line stability for faster straightaways. All-new carcass construction translates to vastly improved lateral response and grip in the corners. DOT approved. Tire Specifications: Position: Rear. Load / speed index: 51L. Outer diameter (inches): 20. Section width (inches): 5. Maximum Load (pounds): 481. Maximum PSI: 25. Tread depth (mm): 4.10. Construction: Tubeless.