Best bike locks (2026)

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Bike locks vary considerably in security, weight, reach, and convenience. Heavy U-locks and chains generally make more sense for expensive bikes or longer stops, while folding and combination locks are easier to carry for everyday commuting.

No portable bike lock is theft-proof. Lock the frame to a solid fixed object, minimize open space inside the lock where practical, and consider securing both wheels when leaving a valuable bike unattended.

Top 7 Picks

1. ABUS Granit Super Extreme 2500 — Carbide-Reinforced High-Security U-Lock

The ABUS Granit Super Extreme 2500 combines a carbide-reinforced shackle with ABUS’s XPlus cylinder and a Sold Secure Diamond rating.

Its construction is aimed at riders who place security ahead of low weight, particularly for e-bikes and higher-value bicycles parked in urban areas.

Why consider it: It combines Diamond-rated security with a carbide-reinforced U-lock design.

Pros

• Sold Secure Diamond rated
• Carbide-reinforced shackle
• XPlus locking cylinder
• Includes an on-bike mounting solution

Cons

• Heavy for daily carrying
• Premium-priced construction

Trade-offs / Who should skip: A lighter folding or combination lock is easier to carry if your parking risk is relatively low.

2. Via Velo Elite U-Lock — 17mm Diamond-Rated U-Lock

The Via Velo Elite uses a 17mm 20CrMnTi steel shackle with an internal locking area of approximately 9.25 by 4.44 inches.

It carries Sold Secure Diamond approval and provides a larger locking area than many compact U-locks, which can make positioning around bike racks easier.

Why consider it: It provides Diamond-rated security with a relatively generous standard-size U-lock opening.

Pros

• Sold Secure Diamond approval
• 17mm shackle
• 9.25 x 4.44-inch internal dimensions
• Suitable for bicycles and e-bikes

Cons

• Bulkier than a compact U-lock
• Fixed U-shape offers less flexibility than a chain

Trade-offs / Who should skip: Choose a chain or folding lock if you regularly use unusually shaped or oversized locking points.

3. KOHLBURG 7-Foot Chain Lock — Heavy Stationary Security Chain

The KOHLBURG uses a roughly 7-foot heavy-duty steel chain and carries a Sold Secure Diamond rating.

At around 18 pounds, it prioritizes substantial construction and reach rather than portability. That makes it more practical for a garage, home anchor, workplace, or another location where the lock can remain instead of traveling with the bike.

Why consider it: Its long chain and substantial construction suit higher-security stationary setups.

Pros

• Sold Secure Diamond rated
• Approximately 7 feet long
• Heavy-duty steel chain
• Four keys included

Cons

• Approximately 18-pound weight
• Impractical for most everyday bike carrying

Trade-offs / Who should skip: Choose a U-lock or folding lock if you need to carry your security setup on every ride.

4. OnGuard Mastiff 6-Foot Chain Lock — Long-Reach Chain and Padlock Setup

The OnGuard Mastiff combines a six-foot chain with 10mm hardened-steel hexagonal links and an X4 padlock.

The long chain provides considerably more positioning flexibility than a U-lock, making it useful around larger posts, bike racks, fences, or when securing more than one part of a bike.

Why consider it: Its six-foot reach provides flexible locking options around larger anchors.

Pros

• Six-foot chain length
• 10mm hardened-steel links
• X4 padlock included
• Flexible around larger locking points

Cons

• Heavier to carry than a U-lock
• Slower to deploy than a compact lock

Trade-offs / Who should skip: A U-lock is more convenient if you normally use standard bike racks and prioritize quick daily locking.

5. ABUS Bordo SmartX 6500A — Alarmed Bluetooth Folding Lock

The Bordo SmartX combines a folding-lock format with Bluetooth unlocking and a 100 dB alarm.

Its 110cm length provides more flexibility around unusual locking points than many U-locks. The folding sections collapse into a more compact package for transport.

Why consider it: It combines keyless operation, an audible alarm, and the flexibility of a folding lock.

Pros

• 100 dB alarm
• Bluetooth unlocking
• 110cm locking length
• Compact folding format
• Sold Secure Gold rated

Cons

• Heavier than simpler folding locks
• Smart operation adds dependence on electronics

Trade-offs / Who should skip: Choose a conventional keyed lock if you prefer mechanical simplicity without app or Bluetooth features.

6. WIDDER 47-Inch Folding Lock — AirTag-Ready Folding Option

The WIDDER provides a 47-inch folding locking length and integrates a chamber for an Apple AirTag.

It includes four keys and a frame-mount bracket designed to carry the folded lock without rattling. The design is useful for riders who want more locking reach than a typical U-lock while retaining a relatively tidy on-bike storage format.

Why consider it: It combines folding-lock flexibility with a concealed location for an AirTag.

Pros

• 47-inch locking length
• Integrated AirTag chamber
• Frame-mount bracket
• Four keys included

Cons

• AirTag is a tracking feature, not additional physical lock strength
• Folding joints create a different security trade-off than a thick U-lock

Trade-offs / Who should skip: Choose a Diamond-rated U-lock if maximum physical resistance matters more than tracking capability and flexibility.

7. NDakter Combination U-Lock — Keyless U-Lock With 5-Foot Cable

The NDakter combines a resettable four-digit U-lock with a five-foot steel cable.

The U-lock can secure the frame to a fixed object, while the additional cable provides a practical way to loop through a wheel or accessory. Keyless operation also removes the need to carry a physical key.

Why consider it: The U-lock and cable combination provides two locking components in one relatively affordable setup.

Pros

• Four-digit resettable combination
• Five-foot steel cable included
• Large U-shaped locking area
• Suitable for bikes, e-bikes, and scooters

Cons

• Cable should be treated as secondary security
• Combination mechanism is less simple than a basic keyed lock

Trade-offs / Who should skip: Choose one of the Diamond-rated locks for higher-risk parking or expensive bikes.

Quick Compare

• Carbide-reinforced high-security U-lock: ABUS Granit Super Extreme 2500
• 17mm Diamond-rated U-lock: Via Velo Elite
• Heavy stationary chain: KOHLBURG 7-Foot Chain
• Long-reach chain setup: OnGuard Mastiff
• Bluetooth and alarm features: ABUS Bordo SmartX 6500A
• Folding lock with AirTag chamber: WIDDER 47-Inch
• Combination U-lock with secondary cable: NDakter

Final Verdict

The ABUS Granit Super Extreme and Via Velo Elite focus on high-security U-lock construction, with both carrying Sold Secure Diamond ratings.

KOHLBURG offers a much heavier stationary chain for situations where portability matters less, while the OnGuard Mastiff provides long reach in a somewhat more conventional chain-and-padlock format.

For riders who prioritize convenience, the ABUS Bordo SmartX combines folding construction with Bluetooth and an alarm, while WIDDER combines a folding format with an AirTag chamber. NDakter provides a simpler keyless U-lock plus cable setup for riders who want to secure both the frame and an additional component.

For higher-value bikes, using two different lock types can add another layer of difficulty by requiring different tools or attack methods.

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