- All-in-One Upgrade Kit: This complete set includes 4 drive shafts, 4 joint shells, and 4 differential speed cups, specifically designed for TT01 and TT02 RC cars, providing everything you need for a reliable upgrade. - Heavy Duty Construction: Made from durable 45 gauge steel, these components are engineered to endure tough racing conditions, enhancing the longevity and performance of your RC vehicle. - Precision Fit and Performance: The upgrade parts come in sizes of 38 x 12 mm, 5 x 12 mm, and 41 x 12 mm, ensuring a perfect fit that optimizes functionality and efficiency during races. - Lightweight Design: Weighing between 35g and 40g, these components maintain the agility of your RC car without sacrificing strength, allowing for superior handling and speed on the track. - Practical Applications: Ideal for competitive racing, these upgrades enhance responsiveness and control, making them essential for both hobbyists seeking improved performance and serious racers looking to gain an edge. - Compatibility: Specifically tailored for TT01 and TT02 models, this upgrade kit ensures seamless integration with your existing setup, simplifying the installation process and enhancing overall vehicle performance.