Bell Sports sells many products for the bicycle enthusiast, including locks. Their combination bike lock allows you to set your own four-digit combination. Some people might find the process of resetting a bike lock tricky, but practice the steps below a few times, and you'll get the hang of it. Always be sure to write down your combination and put it somewhere safe, in case you forget it at some point.
Use your Bell lock's current combination to unlock it. Hold the lock so that its numbers are facing you.
Look at the top of the lock, and you will notice a red-coloured tab. With a lot of force, use your thumb to push this tab forward -- you might need to use both thumbs to accomplish this. Once you have pressed the red tab all the way in, you will have to use your thumbs to pull down on it. The tab will move downwards, and you will hear a clicking sound.
Punch your new four-digit combination into the lock's number pad.
Look into the opening of the lock (the part where the lock opens when you unlock it). You should see a black-coloured tab down in there. You will have to press this tab hard until you again hear a clicking sound.
Lock your bike lock. Open it with your new combination.
If you're prone to forgetting combinations, you could send yourself an e-mail with your combo in it and title the subject of the e-mail "bike lock" so that you'll be able to search it later