My tips for choosing a lock, aside from the security, some locks should be avoided.
- Check the key shape. Some keys with edge shape can get narrow in the middle as a weak point and can break. If the lock is frozen you might need more force. I’ve had ABUS keys break. In a shop, look at the key shape. Or pick a type that is not keyed at the edge.
- Can you lock it without a key? For convenience leave the lock open while riding. Step off and push it closed to lock it. Some locks don’t let you take the key out unless it’s locked again.











The chain lock is short and already heavy. Weight would be a big problem if it was longer. The cable is 180cm so goes around trees well without being heavy.