This bicycle seat clamp quick release is most old bicycles such as compatible with Raleigh, compatible with Bsa, compatible with Dawes, etc.
The bolt size is M8x1.25mm and the bolt length is 55mm. Because the head connection will be connected to the bolt, the bolt length needs to be larger than your original bicycle seat clamp. It will be normal after installation.
Please note: This is not suitable for most alloy frame bicycles, only for M8 threads, please check the size carefully.
The quick release design allows users to quickly install and remove the seat post without using tools, and can quickly raise or lower the seat height. Also known as a seat retainer.
The seat post material is sturdy and durable, and can withstand various shocks and vibrations during riding to ensure riding safety.