How to Lock a Cargo Bike

Cargo bikes are expensive, visible, and hard to hide. A Bullitt or eBullitt costs €3,000–7,000. An Omnium Cargo is €2,000–5,000. A Muli sits at €2,500–5,500. They all sleep outside — often overnight — because they don't fit through most doors. And they're a target: organized bike theft rings in cities like Copenhagen, Berlin, Amsterdam, and London specifically hunt e-cargo bikes.

A good lock slows thieves down. A GPS tracker tells you where the bike went. Component security stops them stripping your wheels and saddle. Insurance pays for a replacement when everything else fails. You need all four layers.

Every product below links to the lock brand's own website. Where relevant, we note which cargo bike manufacturers sell that product — if Larry vs Harry, Omnium, or Muli stock a lock, it's a strong signal it works for their platform.

Layer 1: The Lock

What rating do you need?

Lock ratings matter because your insurance depends on them. Most cargo bike insurance policies require a minimum of Sold Secure Gold — many require Diamond. The Dutch ART rating is used by German and Dutch insurers. Check your policy before buying a lock.

• Sold Secure Diamond — highest tier, includes angle grinder resistance testing
• Sold Secure Gold — high security, minimum for most insurance
• ART 3–4 — Dutch equivalent, required by many German insurers

If you don't have insurance yet, read our guides for Denmark, Germany, and Belgium.

Why cargo bikes are harder to lock

A Bullitt is 2.5 meters long. An Omnium is about 2 meters. They don't fit in standard bike racks. The frame geometry means you often can't loop a U-lock through the frame AND a fixed object. You usually need a chain lock or a long folding lock, at least 100cm of reach, and ideally two locks of different types.

U-Locks

The workhorse of bike security. A U-lock through the rear triangle and a fixed object is the foundation of any setup.

Folding Locks

Lighter and more packable than chains. Excellent as a primary lock in moderate-risk areas or as a secondary lock alongside a U-lock.

Textile Locks

Flexible like a cable, cut-resistant like a chain. Paint-friendly and rattle-free.

Chain Locks

When you can't park close to a bike rack — common with cargo bikes — a chain lock gives you the reach nothing else can.

Frame Locks

Immobilizes the rear wheel instantly when you step off the bike. Not a substitute for a primary lock, but adds a layer of hassle for opportunistic theft. Perfect for quick stops.

Alarms

Doesn't lock anything — it just screams. Pair with your primary lock for an audio deterrent.

The One Key advantage (Bullitt)

Abus makes a system called One Key — multiple locks that all open with the same key. Larry vs Harry sells several One Key combos curated for the Bullitt, pairing chain locks, folding locks, and eBullitt battery locks so one key opens everything. Prices from €250 to €490.

Browse One Key combos at larryvsharry.com →

How to lock a Long John cargo bike

1. Lock through the main frame tube, not the cargo platform
2. Use the rear triangle if possible — hardest part to replace
3. Lock to an immovable object — always
4. Add a second lock on the front wheel or through the cargo area
5. Fill the lock — leave as little space inside the U-lock as possible
6. Position the keyhole downward — harder to pick or drill

Layer 2: Component Security

Wheels, saddles, and seatposts are easy targets if they use quick-release skewers. On a cargo bike, replacing a stolen front wheel can cost €100–300+. These systems replace your existing bolts with coded or magnetic security hardware.

Note for Bullitt owners: the front wheel uses a non-standard 9mm axle. Check compatibility with HexLox or Pitlock before ordering.

Layer 3: GPS Tracking

A lock prevents theft. A tracker helps recovery. For cargo bikes worth thousands, a hidden tracker is worth the investment — insurance claims are processed faster when you can provide police with GPS coordinates.

Cargo bikes have more hiding spots than regular bikes: the cargo area, hollow frame tubes, under the deckplate, inside a lockable cargo box, or in the motor housing. Use two trackers in different locations — one GPS, one AirTag as backup.

Layer 4: Insurance

Locks fail. Trackers get found. The only guaranteed protection is insurance. Cargo bike insurance typically costs €100–300/year. Most policies require a Sold Secure Gold or Diamond rated lock, the bike locked to a fixed object, and a police report within 24–48 hours.

We've written detailed insurance guides:

• Forsikring af ladcykel i Danmark (Danish)
• Cargo Bike Insurance in Germany
• Cargo Bike Insurance in Belgium

The Minimum Setup

If you only do three things:

1. One Sold Secure Diamond U-lock — the Abus Granit XPlus 540 or Kryptonite New York Diamond
2. One hidden AirTag somewhere in the frame or cargo area — €35 and no subscription
3. Insurance that covers theft

Under €250 on top of insurance. Covers the most common scenarios.

The Full Setup

For maximum protection in a high-theft city (Copenhagen, Berlin, Amsterdam, London):

1. Angle-grinder-resistant U-lock (Litelok X1, Hiplok D1000, or Abus Super Extreme 2500)
2. Secondary folding lock (Abus Bordo 6500K Big 1200mm or tex-lock eyelet 160cm)
3. Frame lock (Abus Protectus 5000 or AXA Solid) for quick stops
4. Battery lock (Abus STePS X-Plus) if you ride an eBullitt
5. HexLox or Pitlock on wheels, saddle, seatpost
6. GPS tracker: PowUnity BikeTrax (e-cargo) or Invoxia (pedal-powered)
7. Hidden Apple AirTag as a second layer
8. Standalone cargo bike insurance with theft + damage coverage

What the platforms sell

Browse aftermarket accessories on OpenCargo:

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