High Security Bike Locks
Bike locks built to beat the grinder.
Not all bike locks are created equal. Most can be defeated in seconds with an angle grinder — the tool of choice for professional bike thieves. LITELOK's X1, X1 PLUS, and X3 locks are engineered with patented Barronium® technology to resist exactly that: angle grinder attacks, bolt cutters, and hammers, in a package light enough to carry every day.
If you need flexibility and portability over maximum security, our Boaflexicore® range offers lightweight, wearable locks that make securing your bike effortless on every ride.
Whatever your threat level, riding style, or budget, there's a LITELOK for you - trusted by over 100,000 riders across the UK and beyond.
Frequently Asked Questions
What is the best bike lock for preventing theft?
The best bike lock depends on your threat level. For maximum security against angle grinders and power tools - the methods professional thieves use - the LITELOK X1, X1 PLUS, and X3 are your strongest options, engineered with patented Barronium technology to resist cutting attacks. If you ride in lower-risk areas and need something lighter and more packable, our Boaflexicore flexible locks offer excellent everyday protection in a wearable, carry-friendly design. As a general rule: match your lock's security rating to the value of your bike and your level of risk.
Are angle grinder resistant bike locks worth it?
Yes, if your bike is worth protecting. Angle grinders have become the standard tool for organised bike theft in US cities because they cut through cheap locks in seconds. An angle grinder resistant lock like the LITELOK X1 or X3 dramatically increases the time and effort required to defeat it - and most thieves will move on to an easier target. The added cost of a high-security lock is almost always less than your insurance excess, let alone the cost of replacing your bike.
What is the best bike lock for an e-bike?
E-bikes are high-value targets for bike thieves, so we recommend a lock with a strong security rating. The LITELOK X1 and X3 are popular choices for e-bike riders - they're angle grinder resistant, but light enough not to add significant weight to an already heavy bike. If you need to lock at multiple points (frame and wheel), consider on of our bundles and pair two locks for added security.
What makes LITELOK different from other bike locks?
Most high-security bike locks are heavy, bulky, and awkward to carry - so riders end up leaving them at home. LITELOK's engineering challenge was to combine serious security with a design people would actually use every day. The X range achieves this with Barronium, a patented material that resists angle grinders while keeping the lock light and portable enough to carry with you. It's security you'll actually have with you when you need it.
What type of bike lock is hardest to cut?
Locks engineered to resist angle grinders are the hardest to defeat, as angle grinders are the most powerful cutting tool commonly used by bike thieves. Within the LITELOK range, the X3 offers the highest security rating, followed by the X1 and X1 PLUS. D-locks and chain locks without specialist materials can typically be cut in under a minute with an angle grinder, regardless of their weight or price.
How do I choose the right bike lock?
Consider three things: where you lock your bike, how long it's left unattended, and how much your bike is worth. For city riding with overnight or all-day locking, choose a high-security rated lock like the LITELOK X1 or X3. For short stops in lower-risk areas, a lighter, flexible lock gives you practical everyday security without the bulk. A good rule of thumb is to spend 10% of your bike's value on a lock - and prioritise security rating over size or weight alone.
Bike Locks Built for Modern Theft
Bike theft has changed. Cordless angle grinders — once a professional tool — are now the weapon of choice for organised thieves across UK cities, capable of cutting through most standard D-locks in under 60 seconds. A Gold-rated lock that protected your bike five years ago may offer almost no resistance to the tools thieves carry today.
Litelok was founded in South Wales to solve exactly this problem. Our X Range bike locks are armoured with Barronium® — a patented ceramic composite material that actively destroys angle grinder discs on contact, rather than simply resisting them. The X1 is at least 5× more angle grinder resistant than the leading standard D-lock. The X3 is at least 20× more resistant.
Every X Range lock carries a Sold Secure Diamond rating for both pedal cycle and powered cycle use — the highest independent security certification available in the UK, and accepted by all major cycle insurers for bikes of any value.
For cyclists who want serious security without the weight, our Core range uses Boaflexicore® — a high-tensile composite construction rated Sold Secure Gold and Diamond — in a lock flexible enough to wear around your waist on a ride. No frame mount needed, no extra bulk in your bag.
All Litelok bike locks are designed and manufactured to the highest standards, and have protected thousands of bikes from theft worldwide. Free UK delivery on all orders.
