Best Bike Lock Under £100
Finding a secure bike lock that doesn't break the bank is tough. We have analysed security ratings, owner reviews, and build quality to find the best bike lock under £100 that offers real protection for your bicycle.
Quick answer
The best bike lock under £100 is the Kryptonite Keeper 785 Integrated Chain Lock. It offers Sold Secure Gold-rated security with a convenient integrated bracket. For a lighter, more portable option, the ABUS Granit XPlus 540 is the top compact U-lock choice.
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Research updated June 2026.
Kryptonite Keeper 785 Integrated Chain Lock
Sold Secure Gold rated chain lock with a versatile integrated bracket.
| Product | Best For | Key Spec | Rating | Price |
|---|---|---|---|---|
| Kryptonite Keeper 785 | Best Overall | Gold Rated Chain | 4.7 / 5 | Check Amazon |
| ABUS Granit XPlus 540 | Compact U-Lock | ABUS XPlus Cylinder | 4.6 / 5 | Check Amazon |
| Hiplok DXL D-Lock | Wearable Design | 16mm Hardened Shackle | 4.5 / 5 | Check Amazon |
| Kryptonite Evolution Series 4 | Maximum Portability | Disc-Style Cylinder | 4.5 / 5 | Check Amazon |
| OnGuard Brute STD | Budget Pick | 14mm Shackle | 4.4 / 5 | Check Amazon |
Kryptonite Keeper 785 Integrated Chain Lock
Best OverallPros
- Gold rated security at a reasonable price
- Integrated bracket makes carrying easy
- Thick 10mm hardened chain links
Cons
- Heavier than U-lock alternatives
- Nylon cover can wear over time
The Kryptonite Keeper 785 is a heavy-duty chain lock that delivers Sold Secure Gold rated protection without exceeding the £100 budget. The chain is made of 10mm hardened steel links and comes with a weather-resistant nylon cover to protect your bike's paintwork. The integrated bracket mounts easily to most bike frames, solving the common problem of where to store a chain lock during rides.
Owner reviews consistently praise the lock's robust feel and the peace of mind it provides for securing bikes in moderate to high-risk areas. The key system is reliable, and the lock cylinder resists picking attempts well. While it is heavier than a standard U-lock, the flexibility of the chain allows you to lock your bike to a wider variety of objects, making it a very versatile choice for commuters.
ABUS Granit XPlus 540
Best Compact U-LockPros
- Very high security in a small package
- ABUS XPlus cylinder resists picking
- Lightweight and easy to carry
Cons
- Small shackle limits locking options
- Can be difficult to fit around larger frames
The ABUS Granit XPlus 540 is a compact U-lock that provides Sold Secure Gold rated security in a very portable form factor. The 12mm hardened steel shackle and the proprietary XPlus cylinder make it highly resistant to bolt cutters, leverage attacks, and picking. It comes with two keys and a simple bracket for mounting on your bike frame.
This lock is ideal for riders who prioritise weight and portability above all else. It fits easily into a jacket pocket or a small bag. However, the compact size means you need to be careful when choosing what to lock your bike to, as thick posts or large signs may not fit inside the shackle. Owner reviews highlight the excellent build quality and the smooth, reliable key mechanism.
Hiplok DXL D-Lock
Best Wearable DesignPros
- Unique wearable design, no bracket needed
- Very thick 16mm shackle for high security
- Easy to carry on your belt or bag strap
Cons
- Heavier than traditional U-locks
- Wearable design can feel bulky on the hip
The Hiplok DXL D-Lock is a unique U-lock designed to be worn around your waist or over your shoulder, eliminating the need for a frame-mounted bracket. It features a massive 16mm hardened manganese steel shackle and a double locking mechanism, providing Sold Secure Gold rated security. The lock comes with a weather-resistant sleeve and a comfortable carrying system.
This lock is perfect for riders who do not want to clutter their bike frame with a mount. The wearable design is comfortable for most body types and makes the lock always accessible. The thick shackle offers excellent resistance to bolt cutters, but the lock's weight is noticeable when worn. Owner reviews are very positive about the convenience and the high level of security this lock provides for its price.
Kryptonite Evolution Series 4
Best for PortabilityPros
- Lightweight and very easy to carry
- Disc-style cylinder resists picking and drilling
- Comes with a flexible transit bracket
Cons
- Silver rated, not Gold
- Not suitable for high-risk areas
The Kryptonite Evolution Series 4 is a lightweight U-lock that offers Sold Secure Silver rated security. It features a 13mm hardened steel shackle and a patented disc-style cylinder that provides strong resistance against picking and drilling. The lock includes a flexible bracket that fits most frame shapes and comes with two keys and a key registration card.
This lock is best for riders who need a portable and reliable lock for low to moderate risk areas, such as quick errands or locking up at a gym. It is significantly lighter than Gold-rated locks, making it a great choice for road bikes and commuters who want to minimise weight. Owner reviews praise its ease of use, smooth locking mechanism, and the convenience of the bracket. It is not recommended for overnight parking in high-theft areas.
OnGuard Brute STD
Best Budget PickPros
- Gold rated security at a very low price
- Thick 14mm shackle for strong protection
- Double deadbolt locking mechanism
Cons
- Heavier and bulkier than premium locks
- Keyway can be stiff when new
The OnGuard Brute STD is a budget-friendly U-lock that surprisingly offers Sold Secure Gold rated security. It features a 14mm hardened steel shackle and a double deadbolt locking mechanism that locks both sides of the shackle for increased resistance against twist attacks. It comes with a frame mount and two keys with a key replacement program.
This lock is the best value option for riders who need Gold-rated security but cannot justify spending more. The build quality is solid, and the thick shackle provides genuine deterrence against theft. Owner reviews note that while the lock is heavy and the keyway can be stiff initially, the security it offers for the price is exceptional. It is a great choice for securing a bike in moderate-risk areas on a tight budget.
What to Check Before Buying a Bike Lock Under £100
Choosing the right bike lock requires understanding a few key factors. The most important is the security rating. Look for locks that have been independently tested by organisations like Sold Secure. A Gold rating offers the best protection, while Silver is suitable for lower-risk areas. Your budget of £100 can get you a Gold-rated lock from most reputable brands.
Consider the lock type. U-locks are generally more portable and resistant to leverage attacks, but they can be limited by their size. Chain locks offer more flexibility for locking to various objects but are heavier. Folding locks are a middle ground but often have a lower security rating. Your choice should depend on where and how you park your bike.
Weight and portability are also critical for daily use. A heavy lock might offer better security, but if you find it too inconvenient to carry, you might stop using it. Look for locks with integrated brackets or wearable designs that make carrying easier. Also, check the lock's warranty and key replacement service, as these add long-term value.
Mistakes to Avoid When Buying a Bike Lock
One common mistake is buying a lock based solely on its price or appearance. A cheap lock from an unknown brand may look strong but can be easily cut with basic tools. Always check for an independent security rating like Sold Secure or ART. Do not assume that a thick cable lock is secure, as many cable locks are easily cut with small bolt cutters.
Another mistake is buying a lock that is too small for your locking needs. A compact U-lock might be very secure, but if you cannot fit it around a bike rack or lamp post, it is useless. Measure the objects you typically lock to before buying. Also, avoid using a single lock for a high-value bike. A good rule is to spend 10-15% of your bike's value on a lock, and consider using two different types of locks for maximum security.
FAQs
What is the best bike lock under £100?
The Kryptonite Keeper 785 Integrated Chain Lock is the best overall, offering Sold Secure Gold security and a convenient bracket.
Is a £50 bike lock secure enough?
A £50 lock can provide Sold Secure Silver protection, which is suitable for low-risk areas and quick stops, but not for overnight parking.
What does Sold Secure Gold mean?
It is an independent security rating indicating the lock is highly resistant to attacks from bolt cutters, hacksaws, and leverage tools.
Should I buy a U-lock or a chain lock?
U-locks are more portable and resistant to leverage, while chain locks offer more flexibility for locking to various objects.
How heavy should a bike lock be?
A good balance for daily use is between 1.0 kg and 2.5 kg, depending on how you plan to carry it.
Can I use two locks for better security?
Yes, using two different types of locks, such as a U-lock and a chain lock, is a highly effective strategy to deter thieves.
Are cable locks safe for expensive bikes?
No, cable locks are not recommended for expensive bikes as they can be easily cut with small tools.
Do bike locks come with a warranty?
Most reputable brands like Kryptonite and ABUS offer a limited lifetime warranty against manufacturing defects.
How do I carry a heavy chain lock?
Many chain locks come with a frame-mounted bracket, or you can use a wearable lock like the Hiplok DXL for easy carrying.
What is the best budget bike lock under £100?
The OnGuard Brute STD is the best budget pick, offering Sold Secure Gold protection at a very affordable price.
Our verdict
For most riders, the Kryptonite Keeper 785 Integrated Chain Lock is the best bike lock under £100 due to its Gold-rated security, flexible chain design, and convenient bracket. If you need a lighter, more portable option for quick trips, the ABUS Granit XPlus 540 is an excellent compact U-lock. For the best value, the OnGuard Brute STD provides Gold security at a budget-friendly price.