Best ONGUARD Bike U-Locks of 2025

The ONGUARD Bulldog U-Lock offers robust security for your bike with its double bolt locking mechanism, which secures the shackle on both sides. This feature enhances protection against tampering, giving you peace of mind when you leave your bike unattended. Its durable hardened steel shackle, measuring 11-13mm, is designed to withstand cutting and prying, making it a reliable choice for any cyclist. Furthermore, the bump-proof Z-Cylinder adds an extra layer of protection, resisting picking and drilling attempts. With these features, you can confidently lock up your bike, knowing it is well-guarded against theft.

The OnGuard U-Lock and Cable offer exceptional security for your bike. With its 4-foot braided steel cable, you can easily secure both the frame and wheels, providing extra protection against theft. The innovative X4P Quattro Locking Mechanism enhances security, ensuring that your lock remains tamper-resistant. The TriRadius shackle design allows for versatile locking options, making it easier to attach to various bike racks. Constructed with a 14mm thick hardened steel shackle, this lock stands up to the toughest challenges, giving you peace of mind while you park your bike.

The OnGuard Bulldog LS U-Lock is a long-shackle U-lock designed for bike security. Its X2P Double Bolt Locking Mechanism provides excellent protection against theft. Its long shackle offers more locking options, and it comes with a Snap Lock Quick Release multi-position mounting bracket. The lock comes with five keys, including a micro-light key that projects a bright white beam, making it easy to unlock your bike in low-light conditions.

The ONGUARD Pitbull Medium U-Lock is a bike lock designed with a PitBull Mini crossbar and a medium shackle length, making it ideal for fitting around standard parking meter posts. With a security rating of 80, it's a great option for bicycle messengers. The lock comes with a snap lock quick release multi-position mounting bracket, five laser cut keys, one micro-light, and four extra grip keys. The micro-light key provides a bright white beam, making it easy to unlock your bike in low light conditions.

The ONGUARD Bulldog U-Lock is a reliable and secure bike lock designed to keep your bike safe. With its 7" shackle and 4' braided steel cable, you can easily lock your bike to a standard parking meter post without removing the front wheel. The new Z-Cylinder technology ensures that the lock is bump-proof and resistant to picking, pulling, or drilling. With a security rating of 65, you can have peace of mind knowing that your bike is well protected. The lock also comes with a convenient Snap Lock Quick Release multi-position mounting bracket, making it easy to transport and store. Additionally, the ONGUARD Bulldog U-Lock includes 5 laser cut keys, including a micro-light key that projects a bright white beam. This durable and versatile bike lock is a must-have for any cyclist.

The OnGuard 8010C Bulldog Combo U-Lock is a high-quality bike lock that offers ultimate security and convenience. With its brand new and never used condition, you can trust that this lock will provide reliable protection for your bike. It comes in the manufacturer's retail packaging, ensuring that you receive a genuine product. The full factory warranty further guarantees your satisfaction. This U-lock is specifically designed for bikes, offering a sturdy and reliable way to keep your bike safe. The combination feature eliminates the need for keys, allowing for quick and easy access. The 4.53 x 9.06-inch size provides ample space to secure your bike to various objects. Invest in the OnGuard Bulldog Combo U-Lock and enjoy peace of mind knowing that your bike is secure wherever you go.

The ONGUARD Pitbull Mini DT 8008 D Lock Bike Combination is a bike U-lock with a mini 90 x 140mm (3.55x5.52”) TriRadius shackle and a cable lock that measures 120CM X 10mm (4' X .39"). It features an X4P Quattro Locking Mechanism for four-sided protection and has a Security Rating of 83. It also comes with a Snap Lock Quick Release multi-position mounting bracket and 5 laser cut keys, including 1 micro-light key that projects a bright white beam.

The OnGuard Pitbull STD U-Lock is a category-leading bike U-lock that provides top-notch security for your bike. The lock is designed to be tough and durable, with a strong shackle that can withstand even the most determined attacks. Its compact size makes it easy to carry with you while riding, and the included mounting bracket allows for easy attachment to your bike frame. The lock also comes with five keys, so you can keep a spare set in case you lose one.

The ONGUARD Bulldog Mini U-Lock is a compact and secure bike lock with BullDog level protection. Its bump-proof and drill-resistant New Z-Cylinder ensures top-notch security, while the Snap Lock Quick Release multi-position mounting bracket provides convenient transport. The lock comes with 5 laser cut keys, including a micro-light key that projects a bright white beam, and 4 extra grip keys. With a security rating of 63, the ONGUARD Bulldog Mini U-Lock is an excellent choice for bike riders looking for a high level of security in a compact design.

The OnGuard Bulldog DT U-Lock with 4-Foot Cinch Loop Cable is a bike U-lock that comes with a 9" shackle and a 4' braided steel cable. It allows you to lock your bike to a standard parking meter post without removing the front wheel, providing flexibility and convenience. The lock has a security rating of 65 and uses X2P technology to ensure maximum security for your bike.