Quality assurance: Each wheel undergoes three inspection processes from material to wheel, ensuring a 99.9% pass rate Specific features: The outer side of the wheel is in the shape of an artificial wheel, with colors of yellow and black, giving it a more three-dimensional feel Good performance: Rubber coated wheels with smooth operation and better grip Carefully designed: The four-wheel drive intelligent vehicle can achieve motion modes such as left and right translation, angle drift, inclined 45 direction movement, square track movement, etc Wide application range: This robot's McNamm wheel is compatible with building blocks and TT motors, and four-wheel drive intelligent vehicles can achieve motion modes such as left and right translation, angle drift, inclined 45 direction movement, square track movement, and so on The robot's wheel is compatible with building blocks and TT motors Colour:yellow+black Material:ABS Size:Diameter: about 48mm Package Contents: 4 x Car tires Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.