Buying a bike lock: everything you need to know

Types of locking mechanism

Bike locks can be locked in three different ways: you can get bike locks with a numeric code, with a key or controlled via an app using Bluetooth.

Many people believe that numeric locks are easier to crack. They say that you can hear or feel differences while spinning the dials – which helps you to discern the right number combination. However, this isn’t the case for high-quality bike locks with numeric codes: the mechanism is installed and insulated in such a way that this is practically impossible. In addition, locks are much more likely to be sawn open or smashed than the code be cracked, as listening would take far too long in most instances. So, when it comes to security, it doesn’t matter whether you opt for a key or a numeric code.

Smart locks, which can be controlled via an app and Bluetooth, are a slightly newer variant. These bike locks are usually also fitted with an alarm system that emits a loud noise.

In terms of security, a bike lock with a key is basically equivalent to a bike lock with a numeric code or one with a digital locking system: the type of bike lock has a greater impact. Nevertheless, these types of locking systems have a number of properties:

Different bike locks

There are various types of bike locks. Each has different characteristics – as well as different pros and cons. We’ve summarised the most important features for you in the following overview.

The right lock for you depends primarily on the value of your bike and how long you leave it unattended for.

Bike locks for children

If possible, it makes sense to lock kids’ bikes to a large bike, so you might not need an additional lock. That said, you can get special bike locks for children which are decorated in pretty colours or are simpler to use, for example: this combination lock uses symbols instead of numbers for ease of use, especially by younger children.

Tips: lock up your bike securely

• Don’t just lock up your bike: you should also attach it to a fixed object, such as a bike rack. Metal posts are the most secure, as wood and plastic are easier to cut.

• Loop your lock around the frame and through a wheel.

• Using two locks provides additional security: one around the rear wheel and frame, the other around the front wheel and frame – and make sure that one of them is also attached to the bike rack. It’s best to use different types of bike locks, such as a U-lock and a chain lock, as it takes different tools and other knowledge to crack each lock. This makes the process more complex – and your bike more secure.

• Lock up your bike in a well-lit, busy and easily visible location, so it’s more noticeable when someone tries to fiddle with the lock.

• Make sure the lock is not on the ground. If it’s lying on the ground, it is easier to damage and break open with a hammer. The lock should also be as tight as possible and close to the bike. This makes it difficult to use tools.

• Add a tracker and/or an AirTag to your bike. If it’s stolen despite all your efforts, you can use it to locate your bike. Of course, this is no replacement for a bike lock.

• Note down the bike’s frame number, colour and brand. This information is important for the police if your bike does get stolen. Plus, bikes are usually covered by household contents insurance. E-bikes with powerful batteries are not always included because they are considered a motor vehicle. You can find information about this in your insurance policy.

Security levels for bike locks

Many manufacturers assign a security level to bike locks. These scales have been developed by the manufacturers themselves and are therefore not comparable with each other: there is no overarching scale.

The following questions will help you assess whether a simple lock is enough or whether an ultra-secure one is needed:

• What kind of bike is it (value/popularity)?

• Where do you leave your bike (train station, in front of your house, alpine hut, etc.)?

• How long does the bike stay there (overnight, five minutes, several hours)?

Take care of your bike locks properly

Bike locks need a little maintenance from time to time to make sure they last as long as possible. Remove dirt regularly with a damp cloth and lubricate moving parts to maintain their functionality.

If you have a bike lock that uses a key, you should always add a little graphite spray to the keyhole from time to time. This lubricates the mechanism, but doesn’t bind dirt and therefore doesn’t gum up the lock. It’s also worth lubricating the lock regularly with silicone spray, which prevents water from freezing inside it.