The Kryptonite Kryptolok Standard U-lock is praised as a budget-friendly option offering solid security for low-to-medium risk situations. Outdoor Gear Lab rated it 70/100, highlighting its 13 mm hardened steel shackle that resists cutting and dual-locking mechanism. Tom's Hardware called it a 'best buy' due to its security-to-price ratio. However, reviewers noted issues with the keyway design and the included frame mount's reliability. It's recommended for modest bikes and short stops, but not suitable for expensive bikes in high-risk areas.
Full review
Security Performance
The Kryptonite Kryptolok Standard delivers solid security for its price point, with a 12.7mm hardened steel shackle that resists most cutting attacks. Professional reviewers like those at Outdoorgearlab noted that the lock's shackle, made of 13mm hardened steel, took significantly longer to cut through than other budget U-locks. The updated design features a dual-locking mechanism where the shackle locks into the crossbar on both sides, requiring thieves to make two separate cuts to defeat it. This design prevents leverage attacks and makes it difficult to cut through with standard tools, though reviewers emphasized that the lock is not bolt cutter proof. The reinforced crossbar resists hammer attacks, and the high-security disk-style cylinder offers pick- and drill-resistant protection. However, the 4-foot cable included with the lock can be cut through in seconds and provides minimal practical security.
Independent security ratings show mixed results for the Kryptolok. Sold Secure awarded it a Gold rating, while ART gave it 2 stars out of 5, classifying it as a 'lock for bicycles' rather than a premium security option. Kryptonite's internal rating system places it at 6/10 for moderate-risk situations. The lock's security is significantly enhanced when used properly with locking techniques that keep it away from the ground and fill the lock with bike parts. Reviewers noted that the newer design takes even longer to cut through than its predecessor, requiring about 20 seconds with a powerful angle grinder even when stabilized in a vise. The key design, however, remains problematic with some users reporting difficulty with the keyway mechanism.
In real-world testing scenarios, the Kryptolok performs well against typical theft attempts. The shackle's hardened steel construction makes it resistant to hacksaws, bolt cutters, and angle grinders, though the lock's security is not absolute. Reviewers like those at TheBestBikeLock.com emphasized that while the lock can withstand significant effort from determined thieves, it's not suitable for expensive bikes in high-risk areas. The double deadbolt shackle design provides substantial protection against twisting and leverage attacks, but the lock's vulnerability increases when positioned close to the ground where thieves can use the floor as leverage with larger bolt cutters. The reinforced crossbar and disk-style cylinder provide additional layers of protection against various attack methods.
Build Quality and Design
The Kryptonite Kryptolok Standard features a robust construction with a 12.7mm shackle that represents a significant upgrade from previous models. Outdoorgearlab noted that the lock's shackle is made of 13mm hardened steel, which is harder than most budget U-locks and makes it difficult to cut through. The dual-locking mechanism where the shackle locks into the crossbar on both sides provides enhanced security against leverage attacks. The reinforced crossbar is described as 'pretty heavy-duty' and resistant to hammer attacks. The design includes a 4-foot-long, 10mm thick cable that can be used to secure wheels or accessories, though reviewers emphasized that this cable offers minimal practical security and can be cut through quickly with basic tools.
The lock's construction includes a disk-style cylinder that is both pick- and drill-resistant, adding another layer of security. The crossbar design features scoops and bumps that slot into corresponding areas, anchoring the shackle in four places for enhanced stability. The shackle passes all the way through the crossbar for extra stability, which also helps prevent moisture accumulation and reduces corrosion risk. However, the lock's weight of 2.9 pounds (1.32 kg) makes it somewhat bulky for carrying. The included Transit Flex Frame Bracket, while functional, has received criticism from multiple reviewers for installation difficulties and reliability issues. The bracket's universal design can cause fitment problems with certain bike frames, though some users have successfully installed it with proper technique and online guidance.
The Kryptolok's design incorporates several security improvements over its predecessor. The shackle now locks into the crossbar on both sides, preventing single-point cutting attacks. The scooped ends of the shackle slot into bumps in the crossbar, creating a four-point anchoring system. This design change makes the lock more secure against twisting and leverage attacks while maintaining a relatively compact profile. The lock's overall build quality is described as solid, with the hardened steel construction providing durability. However, the key mechanism has been noted as problematic by some users, with reviewers reporting that the key must be set just right to unlock it, and the shackle can be sticky in the lock. The cable included with the lock, while useful for securing accessories, is described as offering 'very little practical protection' and can be defeated by almost any tool in a thief's arsenal.
Real-World Performance
In practical use, the Kryptonite Kryptolok Standard demonstrates solid performance across various scenarios. Outdoorgearlab's testing showed that the lock's hardened steel shackle took significantly longer to cut through than other budget U-locks, requiring about 20 seconds with a powerful angle grinder even when stabilized. The dual-locking mechanism effectively prevents single-point cutting attacks, requiring thieves to make two separate cuts to defeat the lock. The reinforced crossbar resists hammer attacks, and the disk-style cylinder provides pick- and drill-resistant protection. Reviewers noted that the lock's performance is enhanced when used properly with locking techniques that keep it away from the ground and fill the lock with bike parts to prevent leverage attacks.
The lock's versatility in securing different bike components is a key strength. The long steel shackle makes it easy to lock just about anywhere, accommodating both wheels, frame, and rack on commuter bikes. The 4-foot cable included can secure wheels or accessories, though reviewers emphasized that this cable offers minimal practical security and can be cut through quickly. The lock's performance in real-world scenarios depends heavily on proper usage techniques. Users who position the lock high off the ground and fill it with multiple bike parts report significantly better protection. The lock's security is particularly effective in low- to medium-risk situations, such as locking up at coffee shops or in heavily trafficked areas where thieves are less likely to attempt angle grinder attacks.
Field testing reveals that the Kryptolok performs well in typical urban cycling scenarios. The lock's security is most effective when used with proper technique, keeping it away from the ground where thieves can use leverage. The dual-locking mechanism provides substantial protection against common attack methods, and the hardened steel construction resists cutting attempts. However, the lock's weight of 2.9 pounds (1.32 kg) makes it somewhat cumbersome for carrying. The included frame mount, while functional, has received criticism for installation difficulties and reliability issues. Despite these drawbacks, the lock's performance in real-world scenarios remains solid for its price point, offering good value for budget-conscious cyclists who need reliable security for modest bikes in moderate-risk areas.
What Reviewers Loved
Reviewers consistently praise the Kryptonite Kryptolok Standard for its security-to-price ratio and overall value proposition. Outdoorgearlab highlighted that despite being a budget-friendly U-lock, it offers more security than other models in a similar price range and even more than its predecessor. The hardened steel shackle, measuring 13mm, takes significantly longer to cut through than other inexpensive U-locks, making it a solid choice for budget-conscious cyclists. The dual-locking mechanism where the shackle locks into the crossbar on both sides is particularly appreciated for preventing single-point cutting attacks. Reviewers noted that the lock's performance is enhanced when used properly with locking techniques that keep it away from the ground and fill the lock with bike parts to prevent leverage attacks.
The versatility of the Kryptolok is another major selling point. The long steel shackle makes it easy to lock just about anywhere, accommodating both wheels, frame, and rack on commuter bikes. The lock's ability to secure multiple bike components with a single lock is particularly appreciated by urban cyclists. The reinforced crossbar is described as 'pretty heavy-duty' and resistant to hammer attacks, while the disk-style cylinder provides pick- and drill-resistant protection. Reviewers also appreciate that the lock comes with Kryptonite's Safe Key Program, which offers replacement keys if lost, adding to the lock's value proposition. The lock's performance in low- to medium-risk situations is particularly praised, with reviewers noting that it's suitable for securing inexpensive commuter bikes in urban environments.
The Kryptolok's build quality and durability are frequently mentioned as strengths. The hardened steel construction provides long-lasting protection against various attack methods, and the reinforced crossbar resists damage from hammer attacks. The dual-locking mechanism and four-point anchoring system create a robust security framework that's difficult to compromise. Reviewers noted that the lock's performance is enhanced when used with proper technique, and that it offers good value for its price point. The inclusion of the Safe Key Program and the lock's overall reliability make it a popular choice among budget-conscious cyclists who need dependable security for modest bikes in moderate-risk areas.
Where It Falls Short
The Kryptonite Kryptolok Standard has several notable shortcomings that reviewers have identified. The Transit Flex Frame Bracket included with the lock has received significant criticism for installation difficulties and reliability issues. Outdoorgearlab noted that the bracket is 'not very popular' with users, citing four main complaints: difficulty attaching to bike frames, slippage during use, inadequate holding force, and difficulty getting the lock on and off the mount. The bracket's universal design can cause fitment problems with certain bike frames, and some users report having to follow online installation videos to achieve proper installation. The frame mount's reliability is particularly concerning for cyclists who depend on it for carrying the lock on their bike.
The key mechanism has been a persistent source of frustration for many users. Reviewers have noted that the key must be set just right to unlock it, and the shackle can be sticky in the lock, making operation somewhat difficult. The included 4-foot cable, while useful for securing accessories, is described as offering 'very little practical protection' and can be cut through quickly with basic tools. The lock's weight of 2.9 pounds (1.32 kg) makes it somewhat cumbersome for carrying, especially when compared to lighter alternatives. The lock's security is also limited by its vulnerability when positioned close to the ground where thieves can use leverage attacks with larger bolt cutters.
Despite its security features, the Kryptolok is not suitable for all situations. The lock's internal security rating of 6/10 from Kryptonite indicates it's designed for moderate-risk situations, not high-security environments. Reviewers noted that it's not appropriate for expensive bikes in high-risk areas, where more robust security measures are required. The lock's performance is heavily dependent on proper usage techniques, and improper use can significantly reduce its effectiveness. The included cable, while useful for securing accessories, is described as offering minimal practical security and can be defeated by almost any tool in a thief's arsenal. The lock's weight and bulk make it less convenient for frequent carrying, particularly for cyclists who prefer lightweight options.
Who It's Best For
The Kryptonite Kryptolok Standard is best suited for budget-conscious cyclists who need reliable security for modest bikes in low- to medium-risk environments. Reviewers like those at TheBestBikeLock.com emphasize that it's ideal for 'lower-risk areas, more modest bikes, and short stops.' The lock's security-to-price ratio makes it an attractive option for commuters who want solid protection without breaking the bank. Urban cyclists who use their bikes for short trips and don't require the highest level of security will find the Kryptolok adequate for their needs. The lock's versatility in securing multiple bike components makes it particularly useful for commuters who want to secure both wheels and frame with a single lock.
Cyclists who are willing to invest time in proper locking techniques will benefit most from the Kryptolok's security features. The lock's performance is significantly enhanced when users keep it away from the ground and fill it with multiple bike parts to prevent leverage attacks. The dual-locking mechanism and reinforced crossbar provide substantial protection against common attack methods, making it suitable for urban environments where thieves are less likely to attempt angle grinder attacks. The lock's inclusion of Kryptonite's Safe Key Program adds value for users who might lose their keys, making it a good choice for those who want replacement key services.
The Kryptolok is not recommended for cyclists who need maximum security or who ride in high-risk areas. Reviewers noted that the lock is not bolt cutter proof and that it's not suitable for expensive bikes in high-risk environments. Cyclists who require the highest level of security should look at more robust alternatives, such as the Kryptonite Evolution New-U Standard, which offers superior security features. The lock's weight and bulk make it less suitable for cyclists who frequently carry their lock in bags or who prefer lightweight options. Users who depend on the included frame mount should be aware of its reliability issues and consider third-party alternatives if the included bracket doesn't work for their specific bike frame.
How It Compares to Alternatives
The Kryptonite Kryptolok Standard competes with other budget U-locks but offers superior security compared to many alternatives in its price range. Outdoorgearlab noted that it offers more security than other budget U-locks and even more than its predecessor, though it's not as secure as the Kryptonite Evolution New-U Standard. The Evolution New-U Standard features a 14mm shackle made from 'max performance' steel, which is stronger than the Kryptolok's steel. The Evolution New-U also has a smaller crossbar that reduces weight while maintaining security, weighing 3.5 pounds compared to the Kryptolok's 2.9 pounds. The Kryptolok's 12.7mm shackle is slightly thinner than the Evolution's 14mm shackle, though both use hardened steel construction.
Compared to other U-lock alternatives, the Kryptolok provides good value for money despite its limitations. The lock's dual-locking mechanism and reinforced crossbar offer enhanced security over basic U-locks, though it's not as secure as premium options like the Kryptonite Evolution New-U Standard. The Kryptolok's 4-foot cable, while offering minimal practical security, is included as a convenience feature. Reviewers noted that the lock's performance is enhanced when used properly with locking techniques that keep it away from the ground. The Kryptolok's security rating of 6/10 from Kryptonite contrasts with the Evolution's 8/10 rating, indicating a significant difference in security levels.
When compared to chain locks, the Kryptolok offers a good balance of security and convenience for urban cycling. Chain locks are generally more secure but also more cumbersome to carry and use. The Kryptolok's U-shape makes it easier to use and more convenient for quick locking scenarios, though it's less secure than chain locks. The lock's performance in low- to medium-risk situations makes it a good middle-ground option between convenience and security. Compared to cable locks, the Kryptolok provides significantly better protection, though it's heavier and more complex to use. The Kryptolok's hardened steel construction makes it resistant to cutting attacks, while cable locks can be defeated with basic tools like scissors.
Value at This Price
The Kryptonite Kryptolok Standard offers good value for money considering its security features and price point. Outdoorgearlab's review gave it a 70 overall score, ranking it #3 of 23 in their bike lock testing, which indicates solid performance relative to its competitors. The lock's security-to-price ratio is particularly strong, offering more protection than many budget U-locks while remaining affordable. The inclusion of Kryptonite's Safe Key Program adds value, as it provides replacement keys if lost, which is a significant benefit for users who might misplace their keys. The lock's hardened steel construction and dual-locking mechanism provide substantial security features that justify its price point for budget-conscious cyclists.
The lock's value proposition becomes clear when comparing it to other budget options in the market. Reviewers noted that it offers more security than other budget U-locks and even more than its predecessor, making it a worthwhile upgrade. The lock's performance in low- to medium-risk situations is particularly appreciated, as it provides adequate protection for most urban cycling scenarios. The included 4-foot cable, while not providing significant security, is useful for securing accessories and adds to the lock's versatility. The lock's build quality and durability make it a good long-term investment for cyclists who need reliable security for modest bikes.
The Kryptolok's value is particularly evident when considering its performance relative to its price. At around $78, it's competitively priced compared to other budget U-locks, though it's more expensive than basic alternatives. The lock's security features, including the hardened steel shackle and dual-locking mechanism, provide good protection for its price point. The lock's performance in real-world scenarios, particularly when used with proper locking techniques, demonstrates its value. The inclusion of the Safe Key Program and the lock's overall reliability make it a good choice for budget-conscious cyclists who need dependable security for modest bikes in moderate-risk areas.
Strengths
- +13 mm hardened steel shackle that resists cutting with angle grinder
- +Dual-locking mechanism requires two cuts to defeat
- +Long 4-foot cable included for securing wheels or accessories
- +Includes Kryptonite Safe Key Program for key replacement if lost
Watch-outs
- −Annoying keyway design that requires precise alignment to unlock
- −Included frame mount is difficult to install and prone to slipping
- −Cable is not security-rated and can be cut through quickly
How it compares
The Kryptonite Kryptolok is the most budget-friendly option, but it lacks the angle grinder resistance of the Litelok X1, X3, or Hiplok D1000, making it less suitable for high-risk environments. Compared to the Kryptonite Evolution Mini-7, it's less secure despite being cheaper, and unlike the Kryptonite New York Fahgettaboudit, it's not designed for maximum theft deterrence. It's best suited for low-risk situations where cost is the primary concern.
Who this is for
At a glance: budget-conscious buyers in low-risk areas.
Why you’d buy the Kryptonite KryptoLok
- 13 mm hardened steel shackle that resists cutting with angle grinder.
- Dual-locking mechanism requires two cuts to defeat.
- Long 4-foot cable included for securing wheels or accessories.
Why you’d skip it
- Annoying keyway design that requires precise alignment to unlock.
- Included frame mount is difficult to install and prone to slipping.
- Cable is not security-rated and can be cut through quickly.
Rating sources
“I'm happy about the outcome but frustrated with the problem and Kryptonite.”
Our 3.9 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
