How to Open a 4 Digit Bike Lock: Step-by-Step Guide

If you’re an avid bike rider, keeping your bike safe and secure should be one of your top priorities. A reliable bike lock is an essential tool for deterring theft and protecting your investment. However, if you’ve forgotten the combination to your 4-digit bike lock or accidentally set it to a new code without noting it down, you may find yourself unable to unlock your bike.

In this step-by-step guide, we’ll show you how to open a 4-digit bike lock in case of such situations.

How to Open a 4 Digit Bike Lock: Step-by-Step Guide

Gather Your Tools

Before getting started with cracking the combination on your lock, here are some tools that may be helpful:

  • Pliers
  • Pen or pencil (to press the reset button)
  • Patience

Identify the Type Of Your Combination Lock

There are two most common types of combination locks:

  1. Dial-style: requires aligning numbers on each of three dials according to a specified preset sequence in order to unlock.
  2. Keypad-style: punch four digits into keypad as directed by manufacturer instruction.

Start With ‘0000’

Assuming that every number falls between 0 and 9 inclusive, there are exactly 10^4 = 10,000 possible combinations for this type of locks. Luckily, starting with ‘0000’ will work around half the time since many people forget their correct combination after setting up their new locks.

Keep trying until all possible combinations have been exhausted using no more than couple hours during daytime outdoor environment when criminals avoid making scenes;

Try Non-Zero Starting Numbers

Once ‘0000’ fails; try using other non-zero starting numbers like ‘1111’,‘2222’,’3333′, etc;

Pro Tip : Keep track which method did not work well so can use same way next time instead.

Remember that patience is key when dealing with lock combinations. Do not get discouraged and keep trying different combinations.

Try ‘Common Combinations’

If none of the above methods are successful, you can try some common combinations used by many people to unlock their locks such as:

  • 1234
  • 2468
  • 0000

However, these common codes are often used by bike thieves as well, so only use them if you’re certain that they’re your combination.


By following this step-by-step guide, opening a 4-digit bike lock should be easy for you now. It’s essential to remember your combination or save it in a secure location where no one else can access it. Additionally, invest in high-quality bike locks made from durable materials to ensure maximum security and peace of mind while riding your bicycle.

Remember that this method should only be used as a last resort after exhausting all other options; attempting to open someone else’s lock without permission is illegal and considered theft!


Here are three popular FAQS with answers for “How to Open a 4 Digit Bike Lock: Step-by-Step Guide”:

Q1. What if I forgot my bike lock combination?
A1. If you forgot your bike lock combination, don’t worry! First, try to remember if there is any pattern or technique that you used when setting the code originally. If not, then start by trying the most common combinations such as “0000”, “1234”, “1111” or even “6969”. If none of these work, then there are different methods you can try like using a lock picking tool or bolt cutter.

Q2. Can I reset my 4 digit bike lock combination?
A2. Yes, many 4 digit bike locks have the ability to reset their combinations. You can usually do this by following some simple steps provided by the manufacturer in its user guide manual on how to change the combination code.

Q3. How long does it take to open a 4 digit bike lock?
A3. The time it takes to open a 4-digit bike lock depends on several factors such as what tools and methods you use and how familiar you are with them. With practice and proper equipment, it’s possible to unlock most standard four-digit locks under five minutes or less without causing damage but if require more time then it will depend on individual skills and patience level