Abus Black Abus ACH Classic 5.5KS/100 plug-in chain 2026

The plug-in chain is your additional security solution for your frame lock or the ABUS Alarmbox 2.0. This allows you to flexibly connect your bike to different objects.
The ADAPTOR CHAIN Classic connecting chain is the successor to the proven ACH 2.0 and features a newly designed oval loop ring. Its narrower shape makes it particularly easy to guide through spokes or narrow gaps – for even more convenient connection.

• Doubly secured: the already fitted frame lock blocks the rear wheels of the bike, but does not prevent the bike from being carried away. The connecting chain is the ideal addition for securing your bike to fixed objects such as lamp posts or bike racks. Simply place the ADAPTOR CHAIN Classic around the lamp post, for example, and insert it into the additional lock body of a compatible frame lock or the Alarmbox 2.0 – and your bike is doubly protected. An additional key is not required for the plug-in chain. The frame lock key opens and locks both components.
• The plug-in chain made of hardened steel has a textile coating to protect your bike from damage to the paintwork.
• The ST 5950 2.0 saddle bag offers a practical solution for transport: the 85 cm, 100 cm and 130 cm chain lengths can be stowed safely and compactly in the bag under the saddle.
• The connecting chains – with the exception of the 150 cm chain – are available either individually or as a set with the matching saddle bag.
• 5.5 mm thick square chain made of hardened steel
• Oval loop ring for optimised grip and improved feel
• Fabric coating protects against scratches and paint damage
• Transport in ABUS saddle bag ST 5950 2.0 possible, except for the connecting chain with a length of 150 cm
• Transport in ABUS saddle bag ST 5050 possible, except for the connecting chain with a length of 150 cm
• The lock bags for transporting the connecting chain are attached under the saddle
• In the product variant + ST 5950 2.0, the saddle bag is included in the scope of delivery
• Additional security lock for bikes with a frame lock or the Alarmbox 2.0
• Secures bikes and e-bikes
• For securing the bike to various objects such as bike racks, lamp posts or fences
• Offers flexibility when securing objects
• The adaptor chain is locked directly in the frame lock with the locking bolt so that no separate locking with a key is necessary