OnGuard 8017 Beast Bike Chain Lock with X2P Padlock is built for riders who want serious bike security when leaving their bike unattended. This heavy-duty bike chain lock combines a hardened steel chain with a high-security padlock, helping protect valuable bikes from opportunistic and determined thieves alike.

If you regularly park your bike at train stations, outside cafés, workplaces or apartment buildings, this is the kind of lock that gives genuine peace of mind. The Beast series is designed to make stealing your bike slow, noisy and difficult, which is often enough to send thieves looking elsewhere.

Who is this chain lock for?

Ideal for riders who commute daily, own an e-bike or high-value bicycle, or regularly lock up in public areas for extended periods. It suits urban riders, university commuters, delivery riders and anyone who wants maximum bicycle security rather than a lightweight café stop lock.

Who is this not for?

This is not for riders chasing minimal weight or something to carry in a jersey pocket. At nearly 4kg, it is best transported in a pannier, backpack, cargo bike or left at a regular parking location rather than carried on fast road rides or long recreational cycling.

Why we love it

We’ve found the Beast chain hits a sweet spot between outright security and practical usability. The thick hexagonal links feel reassuringly solid, while the X2P locking system secures both sides of the shackle, which removes common weak points found on cheaper locks. It feels like proper security equipment rather than a token deterrent.

Hot tip!

When using a heavy chain lock, try to keep the chain off the ground and fill as much internal space as possible around the frame and object you are locking to. Less room means fewer leverage opportunities for bolt cutters or pry attacks.

Item specs

• Brand: OnGuard
• Model: 8017 Beast
• Lock type: Heavy-duty bike chain lock with padlock
• Chain length: 110cm
• Chain link thickness: 12mm hexagonal links
• Chain material: Titanium-reinforced hardened steel
• Lock mechanism: X2P Dual Lock Down design
• Cylinder: Z-Cylinder, bump-resistant and pick-resistant
• Shackle protection: Double rubber coated
• Chain sleeve: Protective fabric cover to prevent frame scratches
• Key system: 4 laser-cut keys included
• Keyway cover: Automatic weather protection
• End caps: All-metal impact-resistant design
• Weight: 3.94kg
• Suitable for: High-risk areas, e-bikes, commuter bikes, urban locking