The Box Two Wire Tire at J&R Bicycles are made from state-of-the-art materials with high-tech engineering to reduce weight and improve race performance. Box went all out designing these 60TPI tires, with a high-density casing, high-tensile steel wire bead and tread crafted specifically for BMX racing. Hexagonal knobbies on the sides and a large contact patch on the center of the tire make for super speeds through the straights and control through the corners. Minimal weight with maximum gain. FEATURES 60 TPI High-Density Casing High-Tensile Steel Wire Bead High-Traction Directional Grooves for Starting Gate Grip Point Low Rolling Resistance Center Strip Chevrons Countless Ramped Hexagonal Directional Knobbies WEIGHT: 20 x 1.50" - 325g 20 x 1.75" - 360g 20 x 1.90" - 440g 20 x 1-1/8" - 240g 20 x 1-3/8" - 295g 24 x 1.75” - 440g 26 x 2.10” - 600g Tan / 640 Black 29 x 2.35” - 760 Tan / 780g Black