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10 Best D Locks 2025 in the United States

#1

Winner

10.0 score

Kryptonite New York Fahgettaboutit Mini Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 18mm Shackle with Keys, Ultimate Security Lock for Bicycles E-Bikes Scooters,Black

5%OFF

Kryptonite New York Fahgettaboutit Mini Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 18mm Shackle with Keys, Ultimate Security Lock for Bicycles E-Bikes Scooters,Black

Kryptonite

10.0 score

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The Kryptonite New York Fahgettaboutit Mini Bike U-Lock is designed to offer top-notch security for bikes, e-bikes, and other valuable equipment. Built with an 18mm hardened max-performance steel shackle, it excels in resisting cutting and leverage attacks. The patented double deadbolt locking system further enhances its resistance against twist attacks, making it highly reliable for preventing theft.

Rating
10.0
Chosen by1,367
Locking Mechanism
Size and Weight
Security Rating

Most important from
4659 reviews

Locking Mechanism
The key with a blue light and the ability to insert the bottom piece on either end are nice touches.
Size and Weight
The lock has some weight to it but nothing that would be considered crazy.
Security Rating
This lock is a huge step up from my old random chain lock. The product feels super secure, making it worth the price to protect my electric scooter.
Material
It is a very sturdy U-lock, although the U part is shorter compared to older models.
#2
9.7 score

Kryptonite New York Standard Bike U-Lock, Heavy Duty Anti-Theft, 16mm Shackle with Mounting Bracket and Keys, Ultimate Security for Bicycles E-Bikes Scooters

25%OFF

Kryptonite New York Standard Bike U-Lock, Heavy Duty Anti-Theft, 16mm Shackle with Mounting Bracket and Keys, Ultimate Security for Bicycles E-Bikes Scooters

Kryptonite

9.7 score

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The Kryptonite New York Standard Bike U-Lock is a robust option for securing bicycles, e-bikes, and scooters. Its standout feature is the 16mm hardened max performance steel shackle, which is designed to resist hand tools, bolt cutters, and leverage attacks, making it highly secure. This lock also includes a versatile mounting bracket, allowing for easy transportation, and the vinyl coating helps prevent scratches on your bike. The interior dimensions of 4 x 8 inches provide ample space for locking your bike to various fixtures.

Rating
9.7
Shackle Thickness
Locking Mechanism
Size and Weight

Most important from
4670 reviews

Shackle Thickness
The 16mm hardened max performance steel shackle is tough to disable, even for pros with portable grinders.
Locking Mechanism
The lock is super smooth and the size is good enough to get around a lot of parking rails.
Size and Weight
Despite its weight, this lock offers peace of mind that my bike won't be stolen easily.
Security Rating
This hefty, well-built lock is definitely worth every penny and provides a high level of security.
Mounting Bracket
Mounting hardware is great, although it might not fit all bike frames perfectly.
#3
9.7 score

Kryptonite Evolution Mini-7 Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Lock, 13mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys

28%OFF

Kryptonite Evolution Mini-7 Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Lock, 13mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys

Kryptonite

9.7 score

Check price

The Kryptonite Evolution Mini-7 Bike U-Lock is a robust and secure option for cyclists looking to protect their bikes. One of its major strengths is the 13mm hardened steel shackle, which resists bolt cutters and leverage attacks, significantly boosting security. Additionally, the disc-style cylinder is both pick and drill resistant, further enhancing its anti-theft capabilities.

Rating
9.7
Shackle Thickness
Size and Weight
Security Rating

Most important from
13528 reviews

Shackle Thickness
The lock feels super robust, though the shackle is small and can be a bit tricky to lock anywhere without the wire.
Size and Weight
The mini size is great for small framed bikes, especially on a college campus, but be mindful it might be too small to lock both a wheel and frame to a solid support.
Security Rating
The Kryptonite Evolution Mini-7 is quite stout and any thief will at least need to work a little and carry the proper tools.
Mounting Bracket
The included FlexFrame U-bracket offers nice frame mount options, making it easy to fix to the bike frame.

Top 10 Best D Locks 2025 in the United States

Sponsored

Slide 1

Seatylock

SeatyLock Mason Bike U Lock - Patented Heavy Duty Anti Theft Diamond Security Bicycle Lock - Super Wide Safety Master Tool ULock with Keys for Electric Bikes Scooters and Motorcycles (11.8 Inch)

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#1

Winner

10.0  score
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Kryptonite

Kryptonite New York Fahgettaboutit Mini Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 18mm Shackle with Keys, Ultimate Security Lock for Bicycles E-Bikes Scooters,Black

Shackle Thickness: 18mm
Locking Mechanism: Double deadbolt
Size and Weight: 9.06 x 5.98 x 1.18 inches, 4.55 lbs
Security Rating: 10/10
Material: Steel

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5% OFF

Chosen by 1367 this week

Sponsored

Slide 1

Seatylock

SeatyLock Mason Bike U Lock - Patented Heavy Duty Anti Theft Diamond Security Bicycle Lock - Super Wide Safety Master Tool ULock with Keys for Electric Bikes Scooters and Motorcycles (11.8 Inch)

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#2
9.7  score
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Kryptonite

Kryptonite New York Standard Bike U-Lock, Heavy Duty Anti-Theft, 16mm Shackle with Mounting Bracket and Keys, Ultimate Security for Bicycles E-Bikes Scooters

Shackle Thickness: 16mm
Locking Mechanism: Deadbolt
Size and Weight: 3.15 x 1.18 x 1.18 inches
Material: Alloy Steel
Mounting Bracket: Yes

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25% OFF
#3
9.7  score
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Kryptonite

Kryptonite Evolution Mini-7 Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Lock, 13mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys

Shackle Thickness: 13mm
Locking Mechanism: disc-style cylinder
Size and Weight: 3.25 x 7 inches, 3.55 lbs
Material: Steel
Mounting Bracket: FlexFrame U-bracket

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28% OFF
#4
9.4  score
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Kryptonite

Kryptonite New York Long Shackle Bike U-Lock, Heavy Duty Anti-Theft Security Bicycle Lock Sold Secure Gold, 16mm Long Shackle with Keys, Ultimate Security Lock for Bicycles E-Bikes Scooters

Shackle Thickness: 16mm
Locking Mechanism: Double deadbolt locking
Size and Weight: 4x10.25 inches, 4.85 pounds
Security Rating: 9/10
Material: Alloy Steel

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#5
8.5  score
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Kryptonite

Kryptonite Kryptolok Standard Bike U-Lock with Cable, Heavy Duty Anti-Theft Bicycle U Lock, 12.7mm Shackle and 10mm x 4ft Length Security Cable with Mounting Bracket and Keys

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22% OFF
#6
8.2  score
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Master Lock

Master Lock 8170D, 6-1/8 inch Wide U-Lock with 8" Shackle, Black

Shackle Thickness: 1/2 inch (13 mm)
Locking Mechanism: Key Lock
Size and Weight: 9.8x7.33x1.33 in, 1.96 lbs
Material: Alloy Steel, Rubber
Mounting Bracket: Included carrier bracket

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#7
8.2  score
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Kryptonite

Kryptonite Keeper Standard Anti-Theft U-Lock, Heavy Duty, 12mm Shackle, Black, Combination Lock, Lifetime

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19% OFF
#8
7.9  score
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ABUS

ABUS Granit Extreme 59 U-Lock, 10"/16mm

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#9
7.6  score
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Hiplok

Hiplok DX: Maximum Security U Lock Bike Lock, E-Bike Lock

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#10
7.0  score
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ONGUARD

OnGuard Pitbull STD U-Lock – 14 mm Hardened Steel Shackle, 290 mm Locked Length, X4P Quad Lock Mechanism – Heavy-Duty Bike Lock with 5 Keys (1 LED) and Easy-Mount Bracket

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9% OFF
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Buying Guide for the Best D Locks

Choosing the right D-lock for your bike is crucial to ensure its safety and security. D-locks, also known as U-locks, are popular for their strength and resistance to cutting and leverage attacks. When selecting a D-lock, consider the following key specifications to find the best fit for your needs.
Shackle ThicknessThe shackle is the U-shaped part of the lock that goes around your bike frame and the object you are locking it to. Thicker shackles are generally more resistant to cutting and prying. Shackle thickness can range from around 12mm to over 18mm. For high-risk areas, a thicker shackle (16mm or more) is recommended, while lower-risk areas might be adequately served by a thinner shackle.
Locking MechanismThe locking mechanism is the part of the lock that secures the shackle in place. There are various types, including key-operated and combination locks. Key-operated locks are generally more secure, but you need to keep track of the key. Combination locks offer convenience as you don't need a key, but they can be less secure. Choose a locking mechanism based on your preference for convenience versus security.
Size and WeightD-locks come in various sizes and weights. Larger locks can secure more of your bike or multiple bikes, but they are heavier and less portable. Smaller locks are lighter and easier to carry but may not fit around larger objects. Consider where and how you will be locking your bike to determine the right balance between size and portability.
Security RatingMany D-locks come with a security rating provided by independent testing organizations. These ratings can help you gauge the lock's effectiveness against theft. Higher ratings indicate better security. If you live in a high-theft area or leave your bike unattended for long periods, opt for a lock with a higher security rating.
MaterialThe material of the lock, usually hardened steel, affects its durability and resistance to attacks. Hardened steel is the most common and effective material, but some locks may use other materials or coatings to enhance strength. Ensure the lock is made from high-quality materials to provide the best protection for your bike.
Mounting BracketA mounting bracket allows you to attach the lock to your bike frame when not in use, making it easier to carry. Not all D-locks come with a mounting bracket, so if portability is important to you, look for a lock that includes one. This feature can be particularly useful for daily commuters.

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