This is a front fork washer specially designed for mountain bikes and fixed-gear road bikes. It comes in a wide range of specifications, offering various thicknesses such as 10mm, 5mm, 3mm, and 2mm. The washer is made of aluminum alloy, which is sturdy and durable, providing stable and reliable support for the bicycle headset. (1 piece each of 2mm, 3mm, and 5mm + 3 pieces of 10mm) With its multiple specifications, it can meet different users' needs for fine-tuning the height of the bicycle front fork. Riders can precisely adjust the state of their bicycles according to their own riding habits and actual requirements, thereby optimizing the riding experience. This front fork washer is compatible with various types of mountain bikes and fixed-gear road bikes. Whether for daily riding or professional cycling events, it can play an important role and is an ideal accessory for enhancing the performance and comfort of bicycles.