This product is a pedal extension device for mountain and road bicycles, including a lengthened axle core for pedals, a locking pedal extender, and an axle converter. It is made of metal, ensuring highly reliable quality. The metal material guarantees its sturdiness and durability, enabling it to withstand various pressures and frictions during cycling without being easily damaged, thus providing long - term and stable support for cycling. It comes in a variety of specifications, including axle cores of different lengths and pedal spacers. There are axle core specifications of 16mm and 20mm, which can meet the needs of different users for pedal length, allowing for a more personalized cycling experience. Additionally, it is equipped with pedal spacers, and different combination methods can be flexibly configured according to actual situations. This product has excellent adaptability and can be well matched with mountain and road bicycles. It is suitable for various scenarios such as daily cycling, mountain exploration, and road races. Its design fully takes into account the characteristics of the bicycle pedal system, and after installation, it can function stably, bringing a more comfortable and efficient cycling experience to riders. It is widely sold in regions such as Europe, South America, Southeast Asia, North America, and Northeast Asia, and is highly favored by many cycling enthusiasts.