Locks are the most important security method for your bike. Generally, as you would expect, the more expensive the lock, the higher quality and lower the likelihood that your bike will be stolen. It pays to pay. You should always use a lock when leaving your bike unattended, even if this is only for a few minutes. When buying a lock, invest in one that has either a silver, but preferably gold Sold Secure rating. Again, whilst it can be expensive, invest in more than one lock. This is less expensive than replacing the bike if it is stolen.
Using only one lock on your bike can mean that parts of your bike may be targeted by thieves, multiple locks can help secure the whole bike rather than just the frame. A combination of a D-lock and a cable lock is a good idea, or alternatively use two D-locks.
Make sure that your bike is secured to an immovable object and check the object is fastened to the ground. This object should be one that will not be easily broken, cut or removed and that the bike cannot be lifted over.
Always make sure you park your bike in a sensible place, such as a well-lit, public street. This makes it harder for thieves to steal without the risk of getting caught either by passers-by or CCTV. Leaving your bike in a secluded location offers thieves the time to cut your lock undisturbed. If it’s available, use secure bike parking. Even if this means paying a free, it will be worth the money if it means leaving your bike in a secure place as opposed to unattended on the street. Avoid leaving your bike parked in the same spot everyday; this may stand out to thieves who then might pay more attention to your security methods and ways to exploit them. Also make sure that if you’re leaving your bike unattended, you remove any accessories that might be targeted by thieves.