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SKU: ULCK0110

Sunlite Defender U Medium Bicycle Lock - Heavy-Duty 14mm Hardened Steel Shackle with Double Bolt Locking, Pick and Drill Resistant Cylinder, Includes Mounting Bracket & 2 Laser-Cut Keys

Regular price $36.16
$34.99 Sale price $36.16 Regular price
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Description
Specifications

Introducing the Sunlite Defender U Medium Bike Lock - the ultimate security solution for cyclists seeking durability, enhanced protection, and reliable performance. Crafted to safeguard your bicycle against theft and tampering, this lock combines innovative materials, advanced engineering, and user-friendly features to ensure peace of mind during every ride.

Materials & Construction:

Constructed with a hardened steel shackle, the Sunlite Defender U Medium lock offers robust resistance against cutting and sawing attempts. Its durable build withstands harsh weather conditions, maintaining strength and security over time. The high-quality steel alloy ensures a long-lasting, reliable lock that can handle daily use and exposure.

Performance & Engineering:

Designed with a double bolt locking mechanism, this lock delivers superior holding power and increased resistance to prying attacks. The pick, pull, and drill-resistant cylinder adds an extra layer of defense, making unauthorized access significantly more difficult. The compact size (3.5" x 7") makes it ideal for securing bicycles in various urban and outdoor environments without sacrificing strength or security.

Components & Technology:

Includes a convenient mounting bracket for quick and secure installation on your bike frame, providing easy access and transport. The lock comes with 2 laser-cut keys, ensuring high precision and durability for repeated use. The inclusion of a sturdy bracket minimizes the risk of losing your key and helps keep your lock accessible during your rides.

Style & Use Case:

Perfect for everyday commuters, casual riders, and serious cyclists alike, the Sunlite Defender U Medium lock offers a sleek black finish that complements any bike. Its versatile size makes it suitable for securing bicycles to racks, posts, or other fixed objects in urban, campus, or trail settings. Whether parked outside a caf or at a transit station, this lock provides reliable protection against theft.

Innovative & Differentiating Features:

- Double bolt lock mechanism for enhanced security

- Hardened steel shackle for maximum cut resistance

- Pick, pull, and drill resistant cylinder for tamper-proof protection

- Mounting bracket included for portability and convenience

- Includes 2 laser-cut keys for durability and precision

Item Specifications:

- Lock Type: Key

- Shackle Material: Hardened Steel

- Dimensions: 3.5 inches x 7 inches (8.89cm x 17.78cm)

- Bracket Included: Yes

- Keys: 2 laser-cut keys for added security and longevity

Protect your bike with the trusted strength of the Sunlite Defender U Medium Bike Lock - engineered for security, built for durability, and designed for active cyclists who demand the best.

  • High-security U-lock featuring a durable hardened steel shackle for optimal cut resistance and security in urban environments.
  • Innovative double bolt locking mechanism provides enhanced strength and resistance against theft attempts, ensuring peace of mind.
  • Includes a convenient mounting bracket for easy storage on your bike, plus two laser-cut keys for reliable access and key control.
  • Constructed with high-quality materials and advanced engineering, this lock offers superior pick, pull, and drill resistance, making it ideal for protecting bikes in high-risk areas.
  • Stylish and compact design measuring 14mm x 7 inches (14mm x 17.78cm), perfect for daily cycling commutes, bike storage, and securing expensive accessories.
TypeKey
BracketIncluded
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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!

The nitty gritty, for specific delivery timelines please pay attention to the delivery timelines on the product pages and the time frame estimated in the carts. If you need a part by a specific day, please contact us by chat, phone, or

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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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  • Just don't want it anymore: We have a 30-day return policy for orders within the US. We offer refunds on returned items that are brand new and in their undamaged, original packaging. Customers are responsible for the cost of return shipping. Damaged, installed, and used items as well as those without original packaging are not eligible for returns. If it's returned in this condition it may be denied and sent back to you

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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*Please allow up to 3 business days for us to process your return*

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.

Progress Not Perfection

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

Will to Win

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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