The Exotek F1 Ultra R5 Carpet Works Trailing Steering Set is a high-performance upgrade designed for the F1Ultra Series, as well as Tamiya F104 and TRF103/104 models using 3mm steel pins. About the Steering Set Adjustable Performance Steering Set Engineered for heavy-duty performance, this set improves stability and handling on high-speed tracks with its adjustable trailing axle design, offering -1mm and -2.5mm settings. It features precision-polished 7075 aluminum hubs paired with hardened steel axles, delivering durability and responsiveness ideal for competitive on-road RC racing. Features: Adjustable Trailing Axle Settings Improved High-Speed Handling Design Precision-Polished 7075 Aluminum Hubs Compatibility with Multiple Models Includes: (1) F1 Ultra R5 Carpet Works Trailing Steering Set