Foldable Bike Lock, High Security 5mm Alloy Steel Chain by Toptrek

Protect your ride with the Foldable Bike Lock by Toptrek — a high-security, 5 mm alloy steel chain lock designed for everyday urban use. Built to resist cutting, twisting, and tampering, this lock helps you keep your bike safe while you run errands, commute, or explore the city. The chain’s outer layer is fully enclosed in ABS plastic to prevent rust and wear, while reinforced rivets boost durability for long-lasting performance. With up to level 7 security and a Class B locking cylinder, you get strong protection without compromising easy everyday use.

Main Description

The 5 mm thick alloy chain delivers robust cut- and shear-resistance, making it difficult for thieves to pry or saw through. The outer ABS coating shields the chain from the elements and corrosion, while the riveted joints are reinforced for excellent wear-resistance and reduced deformation. The lock features a Class B double-sided blade cylinder with a complex tooth profile, designed to resist universal keys, sheet metal tools, and other unlocking attempts. Unlocking is straightforward since you don’t have to worry about the key orientation—the lock works smoothly from either side.

Designed for practical, city-friendly security, the folding mechanism offers excellent versatility. The chain extends up to 94 cm (and is available in 83 cm, 100 cm, and 120 cm options) with eight joints that rotate 360 degrees, making it easy to wrap around a frame, a post, or a rack and then fold neatly for storage. When folded, the lock measures a compact 164.5 mm by 58.7 mm, so it fits easily into backpacks, saddlebags, or a bike frame area without getting in the way.

The lock includes a cantilever mounting bracket, whose adjustable diameter suits different seat tube sizes and secures the lock to the bicycle frame without scratching paint. A sturdy rubber band at the top keeps the latch in place and makes it simple to grab when you’re on the go.

Benefits & Tips

• Convenient city security: long enough to lock frame and wheel to a fixed object, while compact enough to carry when not in use.
• Easy folding and mounting: 8 joints rotate 360 degrees for flexible locking and quick mounting on the bike tube with a paint-friendly bracket.
• Practical everyday uses: ideal for cafés, offices, and short stops where you want reliable protection without bulky gear.

Product Specifications

• Brand: Toptrek
• Material: 5 mm thick alloy steel chain with an outer ABS plastic coating
• Length options: 83 cm, 94 cm, 100 cm, 120 cm
• Type: Chain lock with folding design
• Security level: Up to level 7
• Lock cylinder: Class B locking cylinder with double-sided blade and internal milling teeth
• Folding mechanism: 8 joints, 360-degree rotation
• Folded size: 164.5 mm x 58.7 mm
• Bracket: Adjustable cantilever bracket that fits various seat tube sizes; protects paint and includes a rubber grip to prevent latch loss
• Origin: Mainland China

Package includes:

• Foldable bike lock (5 mm alloy chain with ABS coating)
• Adjustable cantilever mounting bracket

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

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