Retractable wheel mounting position prevents wheel contact during setup, reducing the risk of damage or interference. Builtin telescopic rod extends to improve the bike's center of gravity stability when pushing, making it less likely to tilt. Main body is expandable to fit a wide range of frame sizes and styles, increasing compatibility. Made from aluminum alloy for a lightweight yet strong construction; hollow design and precise workmanship contribute to durability and a smooth finish; anodized for added protection. Material and construction: aluminum alloy, hollow design, anodized finish; engineered for strength, light weight, and longevity. Compatibility and size: expandable main body accommodates various frame types and sizes; suitable for different bicycles without requiring multiple tools or adapters. Performance attributes: lightweight and strong, stable handling when moving a bike, and a secure mounting approach that minimizes wheel interference. Use scenarios: In a home garage or workshop, move and maneuver bikes of different frame sizes with a stable push thanks to the telescopic rod and retractable mounting position. When performing maintenance or storage tasks, adjust the expandable main body to fit the bicycle and work comfortably without frame conflicts. While transporting or loading bikes for travel, rely on the lightweight aluminum construction for easier handling and durable performance during handling and setup.