A. This product is a pedal extension device suitable for mountain bikes and road bicycles. It features an extended axle core, lockable pedal extensions, and an axle converter. It is made of metal, offering relatively reliable performance. The metal material makes it sturdy and durable, capable of withstanding various pressures and frictions during cycling and not easily damaged, providing long - term stable support for cycling. B. It offers multiple specifications, including axle cores of different lengths and pedal spacers. The axle core specifications are 16 mm and 20 mm, which can meet users' different needs for pedal length to achieve a more personalized cycling experience. Additionally, it is equipped with pedal spacers that can be flexibly configured in different combinations according to actual situations. C. This product has good adaptability and can match well with mountain bikes and road bicycles. It is suitable for various scenarios, such as daily cycling, mountain exploration, and road races. Its design fully considers the characteristics of the bicycle pedal system, and it can operate stably after installation, bringing a more comfortable and efficient cycling experience to riders. D. This product is widely sold in regions such as Europe, South America, Southeast Asia, North America, and Northeast Asia, and is popular among many cycling enthusiasts.