Features: Heavy duty, 124g/set, weight over other wheels plus counterweight. Let the car center of gravity is lower, not easy to roll over, more passable. Equiped with metal hex, compatible with Axial SCX24 and Traxxas TRX4M truck. Packaged by 1/24 scale roof box, freely give away the roof box. Specifications: Quantity: 4PCS Outer Diameter: 30mm Inner Diameter: 26mm Width: 13.2mm Wheel Hub: 7mm Color: Black Material: metal Package Contents: 4 x Wheel Hub for RC car 4 x TRX4M Wheel Hex Adapter for RC car 4 x SCX24 Wheel Hex Adapter for RC car 1 x Roof Box for RC car 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.