This 5mm chain combination lock is a must - have for urban riders. Its steel chain is sheathed in a high - quality nylon sleeve, which effectively protects your beloved bicycle. You can easily secure this lock onto your bike's top tube. It's lightweight, weighing only 540g, and comes with a 100cm chain length, providing you with enough flexibility.

Using this lock is easy. First, wrap the 100cm chain around your bike's top tube or other parts you want to secure. Then, set your preferred combination on the lock. Remember to keep your combination secret. When it comes to maintenance, try to keep the lock dry. If it gets wet, dry it with a cloth as soon as possible to prevent rust. Also, avoid using excessive force when operating the lock to ensure its long - term use.