This mountain and road bicycle locking seat post clamp ring is made of high - quality aluminum alloy, which is sturdy and durable, providing reliable support for your cycling. It is compatible with seat posts of different bicycle models. Whether it's a mountain bike or a road bike, you can easily find the right size to meet diverse usage needs. The product comes in two combinations: a single seat post clamp and a seat post clamp + cable guide. The single seat post clamp features a simple design and is easy to install. It can firmly grip the seat post, ensuring that the seat post won't loosen during the ride. The seat post clamp + cable guide combination, while providing a secure grip, also helps you better organize the bike's cables, making your bike neater and more orderly. It is widely used in regions such as Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East, and is highly popular among cycling enthusiasts. Whether it's for daily commuting, outdoor mountain adventures, or long - distance road cycling, it is an indispensable helper that can make your cycling safer and more comfortable.