Best ONGUARD Cycling Chain Locks of 2025

The ONGUARD Mastiff Lock Chain features titanium enforced hexagonal steel chain links, providing exceptional strength and durability for your bike security. The X4P Quattro Bolt Mechanism secures all four sides of the shackle, ensuring a robust lock against theft. With a 14mm hardened steel shackle, you can feel confident that your bike is well protected. Additionally, the Z-cylinder is bump-proof, resisting picking, pulling, or drilling, giving you peace of mind when leaving your bike unattended.

The Onguard Mastiff 8022C Lock offers a user-settable 4-digit steel ball combination, ensuring that only you have access to your bike. The 8mm titanium reinforced hardened steel square link chain provides robust resistance against cutting or prying, giving you peace of mind when securing your bicycle. Additionally, the chain cover protects your bike’s paint and finishes, while the embroidered logo is designed to resist flaking or wear. This combination of features makes it an excellent choice for cyclists who prioritise security and convenience.

The Onguard Mastiff 8022D Lock offers exceptional security for your bicycle. Its rotary lock features a deadbolt mechanism, providing you with peace of mind against theft. The 8mm titanium reinforced hardened steel square link chain is designed to resist cutting and prying, ensuring durability. Additionally, the chain cover protects your bike’s paint and finish, while the embroidered logo promises to remain intact, enhancing the lock's longevity.

The ONGUARD Mastiff 8019L Lock offers exceptional security for your bicycle. Its Sold Secure Bicycle Gold rating ensures that you are investing in a reliable and robust lock. The automatic keyway cover protects the locking mechanism from the elements, giving you peace of mind in all weather conditions. Additionally, the 10mm titanium reinforced hardened steel chain is designed to resist cutting or prying, enhancing its strength. With a protective chain cover, you can rest easy knowing your bike's paint and finishes will remain unharmed.

The ONGUARD Mastiff Chain Lock features a robust 3.5-foot chain paired with a Boxer U-Lock, ensuring your bicycle remains secure. The titanium enforced, hexagonal steel chain links offer exceptional cut resistance, providing peace of mind against theft. Additionally, the unique OnGuard cylinder is designed to resist both physical attacks and picking, enhancing your bike's security further. A reinforced sleeve over the crossbar and cylinder adds an extra layer of protection, making it a reliable choice for cyclist safety.

The Onguard Mastiff Chain Lock features titanium enforced hexagonal steel chain links that provide enhanced durability and security for your bicycle. You can rely on the X4P Quattro bolt mechanism, which secures all four sides of the shackle, making it nearly impossible for thieves to access. Additionally, the hardened steel shackle offers an extra layer of protection against cutting. With a bump-proof Z-cylinder, you can feel confident that it resists picking, pulling, or drilling attempts, ensuring your bike remains safe.

The Onguard Beast-8017 Lock offers robust security for your bicycle. Its X2P Dual Lock Down Mechanism secures both sides of the shackle, providing ultimate pull resistance against theft. The 12mm titanium reinforced, hardened steel hexagonal link chain is designed to resist cutting or prying, ensuring your bike remains safe. Additionally, the chain cover protects your bike's paint and finishes, while the embroidered logo ensures durability without flaking. With five laser cut keys, including one with an LED microlight for convenience, you can easily access your lock in low light conditions.

The Onguard Mastiff Lock features robust 8mm hexagonal steel chain links, providing excellent security for your bicycles. Its stainless steel padlock offers superior resistance against attacks, ensuring your bike remains safe. The vinyl chain cover is designed to protect your painted surfaces from scratches, giving you peace of mind. Additionally, you will receive five heavy-duty keys, allowing for convenient access to your lock without the worry of losing your only key.

The Onguard Beast Chain Lock offers robust security for your bicycle. Its lock body features a rubber coating, which not only protects the lock from scratches but also ensures a comfortable grip when in use. The chain is made from solid, hardened steel, reinforced with titanium, providing exceptional strength against cutting. Additionally, its rounded design eliminates pry points, making it harder for thieves to use pry bars against it. Lastly, the chain cover provides optimal protection, keeping your lock in top condition while preventing damage to your bike.

The ONGUARD 8016L Chain Lock offers excellent security for your bicycle. It comes with five laser cut keys, including one micro-light key that projects a bright white beam, making it easier for you to unlock your bike in low light conditions. With a compact package height of 3.0 inches, it’s easy to store or carry. Its length of 18.5 inches and width of 8.0 inches ensures it can fit comfortably in most storage spaces. This combination of features provides convenience and peace of mind when securing your bike.