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SKU: LK8009

OnGuard Bulldog Series Heavy-Duty U-Lock 13mm Hardened Steel Shackle, 4.5 x 11-Inch Keyed Lock with Anti-Theft Guarantee, durable bicycle lock with anti-drill & pick resistance, ideal for bike security, included mounting bracket, black/yellow color

Regular price $47.96
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Description
Specifications

Secure Your Bike with the OnGuard Bulldog Series U-Lock 4.5 x 11" - The Ultimate Heavy-Duty Security Solution

The OnGuard Bulldog Series U-Lock is engineered for cyclists seeking maximum theft protection without compromising durability or style. Designed with premium materials and advanced security features, this high-performance bike lock provides reliable defense against theft and vandalism.

Materials & Construction:

Constructed with a robust 13mm hardened ultra steel shackle, the Bulldog Series U-Lock delivers exceptional strength and resistance to cutting, sawing, and attacks. Featuring a reinforced sleeve over the crossbar and cylinder, it enhances durability and tamper resistance, ensuring your bike is protected regardless of the environment or theft tactics.

Performance & Engineering:

boasting an impressive 4.6-ton pull strength, this lock is engineered to withstand aggressive attack methods. The X2P Double Bolt lock mechanism provides secure, pick-resistant locking, creating a formidable barrier for potential thieves. Its hardened steel shackles combined with anti-drill and anti-pick technology make it one of the most secure U-locks on the market.

Components & Technology:

Equipped with a reliable keyed lock style, the Bulldog U-Lock ensures quick, secure locking and unlocking. The 4.5-inch shackle width and 11-inch length offer versatile locking options, whether securing your bike frame and wheel or locking to a bike rack or pole. Plus, it includes a practical mounting bracket for easy transportation during rides.

Style & Use Case:

With its sleek black and yellow design, the Bulldog Series U-Lock combines visibility with a professional aesthetic, making it ideal for commuting, trail riding, or leaving your bike unattended in urban environments. Its compact, lightweight design (just over 3 pounds) ensures portability without sacrificing security.

Innovative & Unique Features:

- X2P Double Bolt lock mechanism for enhanced security

- Hardened 13mm ultra steel shackle with reinforced sleeve for superior resistance

- 1-year anti-theft guarantee included for peace of mind

- High pull strength of 4.6 tons against physical attacks

- Corrosion-resistant finish for durability in all weather conditions

Specifications:

- Length: 11 inches

- Shackle Diameter: 13mm

- Shackle Width: 4.5 inches

- Lock Style: Keyed

- Weight: Approx. 3.075 pounds

- Includes: Mounting bracket for easy transport

Choose the OnGuard Bulldog Series U-Lock for unmatched security, durability, and peace of mind. Perfect for urban cyclists, commuters, and weekend riders looking to safeguard their bicycle with trusted engineering and advanced protection features. Secure your ride today with the reliable choice in bike security!

  • High-security U-lock featuring a 13mm hardened ultra steel shackle for maximum strength and resistance to cutting and sawing.
  • Equipped with X2P Double Bolt lock mechanisms and anti-drill, pick, and forced entry technologies, ensuring top-tier theft prevention for your bicycle.
  • Constructed from reinforced, hardened steel with advanced sleeve protection over the crossbar and cylinder, providing durability and enhanced security in demanding environments.
  • Ideal for urban cycling and high-crime areas, this 11-inch U-lock offers reliable, portable security with a sleek black/yellow design and includes a convenient mounting bracket for easy transport.
  • Backed by a 1-year anti-theft guarantee, the OnGuard Bulldog Series U-Lock is engineered for serious cyclists seeking unbeatable protection, long-lasting performance, and peace of mind.
Length11
Lock StyleKeyed
Diameter13
Cable IncludedNo
Shackle Width4.5
Advertised Weight3.075
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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.

We provide the you the ability to utilize multiple shipping & billing addresses, based upon what fits your current needs. However you are responsible to maintain and update any new address changes, as 365 Cycles will not be held liable for orders being shipped to an incorrect address.

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If you need to return your order please email us at info@365cycles.com, call us at 603-968-5797, or use the live chat on our site.

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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!

Living an active lifestyle is just that, a lifestyle that never goes away and our goal is to always exceed your expectations so we can take this lifelong journey together. We strive to have the parts you need, at competitive prices with unmatched shipping speeds!

If there is ever an issue with an order we will work at warp speed to fix our mistake and make sure you never go a day without a bicycle! If you are not receiving the quality of service you need from one of our exceptionally qualified bicycle experts, tell them Ben Berman told you to tell them "Customer Loyalty" and then name your terms.

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. 

Customer Loyalty

Put yourself in their shoes and support those who support us.

You Control the Outcome

If it is to be, it’s up to me" You are personally responsible for controlling the outcome.

Seek Understanding

Understanding the answer is more important than the answer.

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Pick a direction, analyze the results, and be willing to change course.

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Customers, 365 Team, Partners, all need the will to win. Bring the Will to Win to every conversion.

Keep Moving

Move the body, move the mind, and remove any hurdles to achieving an active lifestyle.

Do the Right Thing:

Doing the right thing is more important than doing the thing right.

Stronger together:

If you want to go fast, go alone, if you want to go far, go together. Get your team involved and become stronger together.

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Customer Reviews

Based on 168 reviews
60%
(101)
31%
(52)
9%
(15)
0%
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0%
(0)
J
Jeff Yaple

I gave it 4 stars only because of the riding noise when hitting bumps in road greased holes solved that problem otherwise a great lock.;

A
Aa

I’ve used this ULock for years I just repurchased a new one after the same lock stopped working after 8 years outside in a rainy humid climate w/ daily use. Highly recommend excellent lock.;

j
joseph

Good wide U lock. Little problems with the lock after a few years I gotta jiggle the key to get it open but I think it's a good value mid leve security lock at a good price.
Would buy it again.;

M
Matthew Williams

Great product;

F
Fermin M.

Muy buen producto;