ONGUARD bike lock model ONG-5816 — folding/compact bicycle lock, steel links, key lock

ONGUARD ONG-5816 is a compact folding bicycle lock engineered to secure bicycles and small personal vehicles in urban and suburban environments. The lock uses linked steel segments that fold together for reduced bulk and unfold to form a flexible restraint. A key-operated cylinder provides locking and unlocking; the design supports mounting to a frame bracket or carrying in a bag or backpack for daily use.

Advantages

The folding steel links combine flexibility with a high degree of rigidity, allowing the lock to wrap around frames, racks or poles while resisting casual cutting and leverage attacks. Its compact folded size makes it practical for routine transport on a bike or in a pack, and the keyed cylinder offers straightforward operation with a low number of moving parts. The construction materials and joint design are intended to balance portability and security for everyday locking needs.

Suitable for

• Securing children's bicycles and small adult bikes at school or public racks
• Locking scooters, push-bikes or folded bikes during short stops
• Use in urban commuting where a compact, transportable lock is required

Key specifications

• Folding design with linked steel segments for flexibility and compact storage
• Key-operated cylinder for locking and unlocking
• Compact, transportable form factor suitable for mounting or carrying
• Intended for everyday urban use to deter opportunistic theft

How to use

Unfold the linked steel segments and pass the lock around the bicycle frame and a secure fixture such as a rack or pole. Insert the locking bar into the cylinder and turn the key to secure; remove the key and stow it safely. To transport, fold the segments back into the compact configuration and attach to a frame bracket or place in a bag. Regularly check the cylinder and joints for dirt or wear and keep the key in a secure place to avoid lockouts.

Usage recommendations

For improved security, pair the folding lock with a secondary cable or chain to secure wheels or accessories, and choose well-lit, busy locations when leaving the bicycle unattended. Avoid exposing the lock to prolonged saltwater or corrosive environments; apply appropriate lubrication to the cylinder periodically following the manufacturer’s maintenance guidance.