Axa Defender ring lock
The AXA Defender is a good quality frame lock with the option to link a plug in chain so you can lock your bike to a fixed object.
The Axa Defender ring lock offers optimal safety with its anti drilling cylinder and hardened steel bracket.
In combination with the chain extension chain this is rated sold secure Silver
The AXA Defender can be mounted in several different ways. Check if your bike has 2 holes on the underside of your seat stays beside your rear tyre, another option is to mount it on the top bolt if available. The Axa defender is suitable for a variety of frame shapes.