A. This fork spacer is suitable for mountain bikes, road bikes, and fixed-gear bikes, making it a good choice for cycling equipment. It is made of aluminum alloy, which offers good strength and durability. It can provide stable support for the vehicle's front fork, ensuring safety and stability during the ride. B. In terms of specifications, there are two options: 28.6*2mm and 28.6*3mm. Each pack of each specification contains 4 pieces, which can meet the installation needs of different vehicles. C. Whether it's the complex road conditions of mountain bikes, the high-speed riding of road bikes, or the unique performance of fixed-gear bikes, this fork spacer can be adapted to bring you a more comfortable and smooth cycling experience. D. With its reliable quality, it can effectively improve the performance of the vehicle's front fork and is a practical accessory that cycling enthusiasts should not miss.