There are several different types of bike locks. You should find the right kind of lock for you and your bike. Different types of locks have different advantages and disadvantages. However, no matter what type of lock you get, it is important to get the best quality that you can.
If you get the cheapest lock you can find, no matter what type of lock you have, it will not be as secure as it should be. Investing in a lock is just as important as investing in a bicycle. If you do not spend the money to keep your bicycle safe, you Divine Locks may not have a bicycle for very much longer. However, this does not mean that you have to break the bank for a bike lock.
You can get a good lock for a reasonable price no matter what type of lock you get. Because of this, it is important to get the type of lock that works best for both you and your bike. Find the qualities that you want from your bike lock, and match those to the right type of lock.
Chain locks can be very convenient. When you are not using a chain lock, it can be locked to your frame for easy transportation. This generally keeps it out of your way while you are riding, and also keeps it off of your handle bars. While U locks often come with carriers that can be attached to your bike, they do not necessarily work for every bike. Also, if you have multiple bicycles, it becomes more difficult to transport a U lock on the bike without the carrying attachment.
This is not to say that U locks are not useful. They can be easily transported in a bag. However, if you are riding without any bags, they can be inconvenient. Chain locks can be good for locking your entire bike as well. Provided that you have a long enough chain, your lock could reach far enough to secure both tires and the frame. A chain lock can also be easier to lock to thicker racks.