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ABUS Frame Lock Pro Shield XPlus Review: Secure, convenient locking for commuters

ABUS frame lock Pro Shield XPlus 5955 + insert chain 6KS + lock bag - Bicycle lock with XPlus cylinder - Key removable when lock is open - security level 9
4.7
[Quick Frame Locking]  Fast frame lock; NR version allows key removal when open for added convenience.
[Integrated Chain Security]  Enclosed chain inserts into extra lock housing for secondary protection; compatible with ACL 12/100.
[Flexible Mounting Options]  Mount with included screws or use LH adapter strap if no frame holes available.
[XPlus Cylinder Protection]  High-security XPlus cylinder resists tampering and supports the One Key system.
[Practical On-the-Go Use]  Chain stores in matching bag attached to bike for easy daily transport.
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Cycle security for everyday riders, a frame lock designed to secure a bike quickly while giving strong tamper resistance. Everyday cyclists gain peace of mind with fast locking, removable-key convenience and a supplied chain bag, ABUS Frame Lock Pro Shield XPlus. Is that level of security right for urban commuters and light tourers?

⚡ At a Glance
  • Locking Security: XPlus cylinder delivers very high tamper resistance, complemented by an enclosed insert chain
  • Best for: Urban commuters and touring cyclists who need fast, reliable frame locking
  • Not ideal for: Riders who prioritise the absolute lightest possible setup for racing bikes

The XPlus cylinder provides high protection against tampering while the enclosed insert chain adds a secondary locking layer. Simple mounting options and a matching bag for the chain keep everyday use practical and tidy.


Fast, dependable locking – with XPlus cylinder and removable-key NR version

The XPlus cylinder is a high-security lock core designed to resist picking and forced entry. The NR version allows the key to be removed when the lock is open, simplifying repeated locking and unlocking.

Quick locking reduces the time a bike is left vulnerable and removable-key convenience stops keys dangling while riding. Regular stops become less of a hassle for commuters.

Extra theft deterrence – thanks to the enclosed insert chain 6KS

An insert chain can be pulled out and fed through the frame and a fixed object, then locked into the additional housing on the frame lock. The chain acts as a secondary safety device and pairs with the frame lock for two-point protection.

Using the chain increases security for longer stops or when securing both wheel and frame. The arrangement deters opportunist thieves more effectively than a frame lock alone.

Flexible fitting and tidy transport – with screws or LH adapter and supplied bag

Mounting is possible using enclosed screws to attach the lock to the rear triangle, or the LH adapter tensioning strap where drill holes are not available. The matching bag stores the insert chain and can be attached to the bike for transport.

Retrofit installation suits a wide range of frames and keeps the chain stowed neatly for everyday rides. Riders can add the lock without major frame modifications and carry the chain without rattling.

✨ The 4 Key Reasons for ABUS Frame Lock Pro Shield XPlus
  1. XPlus cylinder – Exceptionally hard to pick and tamper, raising theft deterrence.
  2. Insert chain – Secondary locking extends protection for longer parking or busy stops.
  3. Mounting options – Secure attachment using screws or tension strap fits most frames.
  4. Lock bag – Neat on-bike storage keeps the chain accessible without rattling.
📋 Technical Details at a Glance
  • Category: Bicycle frame lock
  • Lock Type: Frame lock with insert chain
  • Cylinder: XPlus cylinder
  • Security Level: 9
  • Chain: Enclosed insert chain (6KS)
❓ Frequently Asked Questions

Q: Can the key be removed while the lock is open?

A: Yes, the NR version permits key removal when the lock is open, making it easy to leave the key in a pocket while riding.

Q: How is the insert chain stored when not in use?

A: The insert chain can be carried in the supplied bag, which attaches to the bike for neat, rattle-free transport.

Q: Is the lock compatible with other connection systems?

A: Compatibility includes the ACL 12/100 connection cable and the lock can be integrated into a One Key system.

🏆 Our Verdict

Suitable for city commuters and touring cyclists who want quick, robust frame locking, with added convenience for daily use. The pairing of an XPlus cylinder, removable-key NR option and an enclosed insert chain makes for secure, flexible protection. While representing a higher initial outlay than a basic ring lock, the durable cylinder, chain and tidy mounting deliver strong long-term value for regular riders.