U-lock bicycle lock No name L47J — combination padlock U-lock for bike security

U-lock No name L47J is a combination-style U-lock designed to secure bicycles in everyday urban environments. The lock features a rigid U-shaped shackle and an integrated numeric code mechanism, eliminating the need for keys while providing a straightforward way to lock a bike frame and wheel to fixed objects such as racks, poles or sturdy fixtures. Its compact form factor is intended for convenient transport and routine use when a reprogrammable combination lock is preferred.

Advantages

The U-shaped shackle provides a secure anchoring geometry that resists casual torsion and leverage attempts compared with simple cable locks. The numeric combination mechanism removes the need to carry a key and allows code changes for added user control. Compact dimensions make the lock easy to carry on short commutes or store on a bike frame using common mounting brackets. The construction balances portability and resistance for low- to medium-risk urban parking scenarios.

Suitable for

• Securing commuter and city bicycles at bike racks or street fixtures
• Locking a bike during short stops such as shopping or running errands
• Use where a keyless numeric combination is preferred for multiple users or occasional sharing
• Children’s and lightweight bikes in low- to moderate-risk areas

Key specifications

• Lock type: U-lock with numeric combination mechanism
• Shackle form: rigid U-shaped shackle for frame and wheel anchoring
• Operation: reprogrammable numeric code (keyless)
• Size: compact design suitable for everyday urban use and transport
• Application: intended for fixed-point locking to racks, poles and sturdy fixtures

How to use

Position the U-shaped shackle around the bike frame and a secure fixed object so that the shackle and crossbar are accessible. Set the numeric dials to your chosen code and push the crossbar into the shackle until it locks. Verify the lock engages by turning the dials away from the code and attempting to pull the crossbar free. To change the combination, follow the manufacturer’s reprogramming procedure provided with the product packaging and ensure the new code is memorized or stored securely.

Usage recommendations

For improved security, combine the U-lock with an additional cable or chain for accessories and wheels, park in well-lit and visible locations, and avoid leaving the bike unattended for long periods in high-risk areas. Regularly inspect the lock for signs of wear or tampering and keep the combination code confidential to reduce unauthorized access.