Founded in 1962, Kenda Tires has spent over 50 years doing what they do best - manufacturing quality tires. Sizes for most modern and vintage MX and off-road motorcycles. Knob pattern provides traction in a variety of terrains. Old school design adds flavor to vintage motorcycles. Rubber compound engineered for high grip and long lasting tread wear. Note: Some sizes are NOT DOT approved. Please note: Tire sizes vary by ride, please check your current tire and wheel sizes before placing the order. If you have any questions, please call Customer Service at 1-888-676-8853. Tire Specifications: Ply rating: 4. Overall diameter (inches): 21.50. Section width (inches): 4.30. Maximum load (pounds): 507 @ 33 PSI. Tread depth (mm): 14.00. Weight (pounds): 7.80. Construction: Tube type.