Description: 【Double Motor Drive】: The R3W8 smart car chassis features a double motor drive system, providing sturdy power and smooth operation for your DIY projects 【Highly Expandable】: This versatile chassis allows you to diy and expand its capabilities, enabling the creation of various smart car functions such as line tracking, obstacle avoidance, and control 【Silicone Wheels】: Equipped with silicone wheels designed with treads patterns for high friction and antislip performance, ensuring great adaptability to different terrains while reducing noise and vibration during movement 【Quality Materials】: Constructed from ABS and silicone materials, this replacement chassis offers longevity and reliability for your smart car projects 【Compact Design】: With dimensions of 17cmx14.5cmx6.6cm, the compact size of this 2 wheel car chassis makes it easy to handle while providing ample space for additional components in your DIY builds Specification: Material: ABS, Silicone Color: Black Size Chart: 17cmx14.5cmx6.6cm/6.69inchx5.71inchx2.60inch Package Includes: 1 Smart Car Chassis with Motors (Need Assembly by yourself) Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.