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SKU: LK8111

Secure & Durable OnGuard Bulldog Series U-Lock - 13mm Hardened Steel Shackle, Multi-Tool Locking Technology, 4.5 x 9 Inches, Keyed Lock, Anti-Theft Design with Bracket, Ideal for Bicycle Security and High-Impact Use

Regular price $39.96
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Description
Specifications

Secure Your Bicycle with the OnGuard Bulldog Series U-Lock - 4.5" x 9" Keyed, Black/Yellow

Experience premier bicycle security with the OnGuard Bulldog Series U-Lock, engineered for ultimate strength and durability. Crafted from high-quality materials and featuring advanced locking technology, this heavy-duty lock provides unbeatable protection against theft, making it an essential accessory for cyclists who prioritize peace of mind.

Materials & Engineering

Constructed with a robust 11mm hardened ultra steel shackle, the Bulldog U-Lock offers exceptional resistance to cutting, sawing, and leverage attacks. The shackle is reinforced with a protective sleeve over the crossbar and cylinder, ensuring added security and durability while resisting drill and pick attacks. Its rugged black and yellow finish not only enhances visibility but also signifies reliability and toughness.

Performance & Components

Designed with X2P Double Bolt Lock mechanisms, the Bulldog Series ensures a secure and tamper-proof locking process. With an impressive 4.6 tons of pull strength, this lock stands up to rigorous theft attempts. The 9-inch length and 4.5-inch wide shackle provide optimal versatility for locking bicycles to a variety of fixtures, while the keyed lock offers quick and reliable access every time.

Innovative Features & Use Case

The Bulldog Series includes a free one-year anti-theft guarantee, reflecting OnGuard's confidence in its locking system. Its compact design makes it ideal for securing bikes at home, in urban environments, or on the go, providing peace of mind without sacrificing portability. The high-visibility black/yellow color combo enhances visibility for added deterrence.

Specifications Overview

- Length: 9 inches

- Shackle Diameter: 11mm

- Shackle Width: 4.5 inches

- Lock Style: Keyed

- Weight: 2.21 lbs

- Included: Mounting bracket for convenient carriage

- No cable included

Optimize your bike security with the OnGuard Bulldog Series U-Lock-a tough, dependable, and technologically advanced locking solution designed to safeguard your bike wherever you ride. Perfect for urban commuters, mountain bikers, and casual cyclists alike, this lock ensures your bicycle stays protected against theft and tampering.

  • High-security U-lock with 13mm hardened ultra steel shackle for maximum resistance against cutting and sawing, ensuring premium theft protection for bicycles.
  • Featuring X2P Double Bolt lock mechanisms and anti-drill, pick-resistant technology for advanced security and peace of mind during bike storage or transit.
  • Constructed from durable, hardened materials including a reinforced sleeve over the crossbar and cylinder, offering enhanced tamper resistance and long-lasting performance in urban and rugged environments.
  • Designed with a compact 4.5 x 9-inch footprint and a keyed lock style, this U-lock offers a perfect balance of portability, strength, and ease of use for everyday cyclists and commuters.
  • Includes a convenient mounting bracket and a 1-year anti-theft guarantee, making it an ideal choice for professional bike shops and serious cyclists seeking reliable, high-performance bike security solutions.
Length9
Lock StyleKeyed
Diameter11
Cable IncludedNo
Shackle Width4.5
Advertised Weight2.21
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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

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

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

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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 67 reviews
61%
(41)
25%
(17)
13%
(9)
0%
(0)
0%
(0)
M
Marcela argueta

Muy buen !;

F
Freddy A. Olguin

tks;

b
bikeka

So far this has been a great lock. I comes with 4 keys which I really like. There has been some complaining about the mounting bracket but so far it works fine for me.;

S
Sal

I work for a delivery company and hand cart's are often "borrowed" fron co- workers if they are not locked up. A chain will be cut if you are on vacation. This lock has kept my handcart safe for the last 2 years. It comes with 4 keys 1 with a light. A couple other co-workers have now bought the same lock.;

J
JongHyunLee

Nobody can still yours;