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SKU: LK8015

OnGuard Bulldog Series U-Lock 13mm Hardened Steel Shackle, Keyed Lock with 4' Security Cable & Bracket - Anti-Theft, High-Strength Bike Lock with Double Bolt Mechanism & Reinforced Crossbar for Maximum Bicycle Security

Regular price $47.96
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Description
Specifications

Secure Your Bike with Unmatched Strength: OnGuard Bulldog Series U-Lock 3.5 x 5.5" with Cable & Bracket

Upgrade your bike security with the OnGuard Bulldog Series U-Lock, a premium lock engineered for maximum protection and peace of mind. Measuring 3.5 x 5.5 inches, this high-performance U-lock features a 13mm hardened ultra steel shackle designed to withstand theft attempts and resist cutting, drilling, and picking.

Materials & Construction: Crafted from ultra-strong, hardened steel, the Bulldog U-Lock boasts a 13mm shackle with reinforced sleeves over the crossbar and cylinder, enhancing durability and tamper resistance. Its rugged construction ensures long-lasting security even in challenging environments.

Performance & Engineering: Offering a formidable 4.6-ton pull strength, this lock provides formidable resistance against theft, making it suitable for urban, residential, and commercial bike security needs. The advanced double-bolt lock mechanism (X2P) ensures maximum holding power and resistance to forced entry, while anti-drill and anti-pick features add an extra layer of protection.

Components & Technology: This keyed lock comes complete with a flexible 4-foot cable and a mounting bracket for easy transport and quick access. The cable is ideal for locking accessories, helmets, or multiple bikes, providing versatile security solutions. The lock's cylinder is reinforced with a hardened sleeve for enhanced anti-bypass security.

Style & Use Case: Designed for daily commuters, bike enthusiasts, and professional cyclists, this lock combines rugged style with practical function. Its compact design allows for easy portability, while its robust construction is perfect for securing bikes in high-theft areas or outdoor environments.

Innovative & Differentiating Features: Included with your purchase is a free 1-year anti-theft guarantee, underscoring OnGuard's confidence in its durability and security capabilities. The Bulldog Series U-Lock's combination of strength, precision engineering, and added accessories makes it a top choice for cyclists seeking reliable theft protection.

Specifications:

- Length: 5.5 inches

- Width: 3.55 inches

- Shackle Diameter: 13mm

- Weight: 2.74 lbs

- Lock Style: Keyed with included key

- Cable Included: Yes (4-foot security cable)

Protect your investment with the OnGuard Bulldog Series U-Lock - the ultimate in bicycle security, combining high-grade materials, innovative locking technology, and exceptional build quality to keep your bike safe where it matters most.

  • Heavy-duty 13mm hardened ultra steel shackle provides maximum cut resistance and resilience against bolt cutters and leverage attacks.
  • Advanced X2P Double Bolt lock mechanism offers enhanced security and resistance to picking, ensuring your bike stays protected in high-theft areas.
  • Includes a versatile 4-foot coiled cable and mounting bracket for easy locking options, ideal for securing bikes to racks, posts, or immovable objects during daily commutes or extended stops.
  • Innovative reinforced sleeve design over the shackle and cylinder adds an extra layer of defense against drilling and tampering, making it one of the most secure U-locks on the market.
  • Designed with a compact 5.5-inch lock body and a 3.55-inch shackle width, combining portability with high security, perfect for urban cyclists and bike commuters seeking reliable theft prevention.
Length5.5
Lock StyleCable
Lock StyleKeyed
Cable IncludedYes
Shackle Width3.55
Advertised Weight2.74
Diameter13
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We pride ourselves on our ability to ship and deliver your gear with excessive speed! We ship from 22 locations throughout the United States and most orders will arrive in 3 days or less with Free Shipping on orders over $75!

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Most orders placed during the workweek before 1:00 PM Eastern time ship the same day, but during peak/holiday season or depending on inventory location handling time can take up to 48 hours. If you have questions regarding shipping estimates, don't hesitate to get in touch with us before placing the order. There is a direct signature requirement for all orders over $500.

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365 Cycles puts the customer above everything. Our number one goal is your satisfaction. When you press the shift lever you want the gears to shift, and when you buy bicycle parts, you want the bicycle parts to arrive on time in new condition. With over 60,000 products and 22 warehouse locations throughout the country, we have the parts you need and they are coming in hot!

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Our team is waiting to help you 7 days a week and they are more qualified to help than I am but if you ever feel like you're not getting the service you need I’m personally asking you to email me at ben@365cycles.com with "CUSTOMER LOYALTY" in the title and I will personally handle your order.

Over the years we have served millions of satisfied customers and continue to serve many of them today. With your feedback, we are confident we can take this lifelong journey together and build a friendship that goes beyond parts and accessories.

“If you want to go fast, go alone, if you want to go far, go together.” -Someone Smart

Ben Berman Founder & CEO of 365 Cycles


Company Core Values: 

These were established by the members of our team and we use them every week to call out team members who have shined in one of these areas. Feel free to let us know at info@365cycles.com if someone you worked with has gone above and beyond in one of these areas. 

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Customer Reviews

Based on 89 reviews
61%
(54)
30%
(27)
9%
(8)
0%
(0)
0%
(0)
D
Dawn Palmer

Seems nice and solid. Bike will not be left unattended for long periods of time but I still want it secure. It is easy to use and also not too heavy - that was important for me.;

W
William Brown

I read someone's comment that said that the clamps that hold the lock on the bike is not made well. Nothing can be more far from the truth.

I should know because I have bought 4 of these ulocks. And after 5 accidents with my ulocks attached all of my locks have stayed in place.

People act like there is no such thing as an exception nor a faulty independent product;

U
USAFA93

Nothing will stop a determined and resourceful thief but this Bulldog will encourage him to move to the easier target. The quality is top-notch. I bought this for my son's bike. We live in a nice neighborhood (Greenwich CT) but nice bikes seem to attract bike thieves from the Bronx. After two years of use the bike is still in our possession while many located at the same bike-stand have gone missing. And for me that's a huge win. It's more than the value of the bike that is at stake for me. I don't want my son being a victim to scumbags and suffering that emotional toll. He'll get exposed to that later in life but while on my watch I want him to feel safe.;

M
Mike6boro

I was pretty impressed I didn’t know how small this u lock is but it’s very strong and not in your way. AMAZING!!;

m
marksports

I like the fact they give you 4 keys with this lock as I like to keep a spare in another location. This also allows me to give access to at least two other people!;