Home > Antitheft Locking Devices > Kryptonite Heavy Duty Key Lock, Black/Yellow, 4in x 8in, Anti-Theft Protection Included ; Visit the Kryptonite Store
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6,852 reviews
covering
33 products
for the category
Antitheft Locking Devices
Experiential insights by users
About Kryptonite Heavy Duty Key Lock
Overall Feedback:
82% positive
64% appreciated the adjustable settings, although 36% found them limited.
I do not use the bracket as it is not secure.
I have noticed that the key does not turn all the way, which is a major issue with the product.
64% praised the long-lasting battery life, while 36% experienced frequent battery drain.
My lock jammed after just 5 months of use, rendering it useless. This is negative feedback regarding the battery life of antitheft-locking-devices.
I warned the buyer that the company's lifetime guarantee is not as good as it seems. After 2 weeks, I received only one response suggesting to add WD40 to the broken lock.
69% praised its compatibility with various devices, while 31% experienced integration issues.
I found that the Flex Frame was already included in the U-lock, contrary to my expectation of paying extra for it.
I bought both locks and use them on my Ebike in an urban place.
I suggest paying attention to the mount quality of the lock as it is poor. The lock integrates the mounting functionality, so if the mount wears down, it's better to get a kryptonite lock without a mount appearance to avoid the hassle.
I use this to lock my e-bike, but the bracket seems insecure so I don't use it.
69% liked the sleek and modern design, but 31% found it unattractive.
I found the perfect place to put the lock, between the triangle and the bottom of the seat post.
The lock is larger in size and mounting space on frame is limited.
My only complaint with this lock is that unlocking it can be a bit flimsy. Sometimes the key doesn't quite turn and that can make it quite difficult when unlocking at night. The light on the key isn't as handy because you have to hold and press at the same time.
I am concerned about the security of the bracket as it does not seem very secure, so I do not use it.
79% appreciated its long-lasting durability, although 21% experienced wear and tear.
In a heavy downtown urban environment, the lock is very secure.
The bike lock provides a sense of security and is heavy duty.
The lock was stolen along with my scooter within 8 hours of use, indicating its lack of durability.
The mounting system of the lock is not durable and it loosens after 2 days of riding, causing it to wobble around, slip down the frame, or interfere with the pedal stroke.
73% praised for its exceptional locking mechanism, while 27% found it vulnerable to attacks.
The locking and unlocking mechanism is straightforward, but it can be challenging to get it close to a small fixed object that allows the lock to go through the frame.
70% liked the sensitive alarm detection, but 30% experienced false triggers.
I believe this lock is tough and will take a long time to break down if used well.
I was worried that the lock might fall off or cause issues if the mount wore down quickly.
I am having trouble turning the key all the way, which seems to be a problem with the antitheft-locking-device.
69% liked the perfect size and fit, but 31% found it too bulky.
The lock is big enough to fit around my ebike's downtube and seems hard to defeat.
Due to the larger size of the lock, there is limited mounting space on the frame.
The design specs show a bike for a giant man where the u-lock can be mounted without obstructing range of motion.
I am dissatisfied with the security of the bracket as it does not seem very secure, so I do not use it.
89% praised its compatibility with various devices
83% liked the sleek and modern design
Experiential insights by users
I have described how to adjust the antitheft-locking-device by arranging the lock so that the brake pedal arm is in between the two tines of the fork and pulling the handle back towards you to raise a little bar under the brake pedal arm, locking it on.
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