Brand | Kryptonite |
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Lock Type | U-lock |
Item Dimensions LxWxH | 9.02 x 4.02 x 1.18 inches |
Material | hardened Performance steel shackle |
Recommended Uses For Product | Security |
Style | Original |
Color | Black |
Finish Type | Vinyl |
Included Components | Kryptonite Kryptolok Series 2 Standard Bicycle U-Lock With Transit Flexframe Bracket (4-Inch X 9-Inch) With 4-Foot Flex Cable, Transit Flexframe Bracket |
Controller Type | Hand Control |
Shape | U Shape |
Item Weight | 1.63 Kilograms |
Control Method | App |
Manufacturer | Kryptonite |
Part Number | 001072 |
Item Weight | 3.59 pounds |
Product Dimensions | 9.02 x 4.02 x 1.18 inches |
Item model number | LK41051 |
Is Discontinued By Manufacturer | No |
Finish | Vinyl |
Item Package Quantity | 1 |
Number Of Pieces | 2 |
Batteries Included? | No |
Batteries Required? | No |
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96% positive over last 12 months
80% positive over last 12 months
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Kryptonite KryptoLok Series 2 Standard Heavy Duty Bicycle U Lock with 4ft Flex Bike Cable
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Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
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Purchase options and add-ons
Brand | Kryptonite |
Lock Type | U-lock |
Item Dimensions LxWxH | 9.02 x 4.02 x 1.18 inches |
Material | hardened Performance steel shackle |
Recommended Uses For Product | Security |
About this item
- Replaced with new and improved design in 2017 - check out our New U lock, it will send any bike thief running!
- 13mm hardened MAX-PERFORMANCE STEEL SHACKLE resists cutting and leverage attacks
- Includes 4’ KRYPTOFLEX DOUBLE LOOP CABLE for securing front wheel or accessories
- Reinforced HARDENED CROSS BAR DESIGN provides increased protection
- HIGH SECURITY DISC-STYLE CYLINDER
- Center keyway defends against leverage attacks
- ANTI-RATTLE BUMPERS reduce noise during transport
- Rotating dustcover protects cylinder
- Includes NEW TRANSIT FLEXFRAME-U transportation system which allows for versatile carrying
- Protective vinyl coating
Customer ratings by feature
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From the manufacturer
- Rated 6/10 on Kryptonite's security scale
- Moderate security lock
- Eligible for the optional Anti-theft Protection
KryptoLok STD U-Lock with 4" Flex
Moderate Security
- 12.7mm hardened performance steel shackle.
- Includes 2 stainless steel keys, with ergonomic design to reduce the amount of torque, and keep them from bending or breaking.
- New "pass-thru" crossbar design includes enhanced anti-rotation features, providing advanced protection against twist and single cut style attacks.
- New hardened double-deadbolts engage both shackle ends increasing holding power.
- New dust cover.
- High security disc-style cylinder is pick and drill resistant.
- Includes flexframe-u bracket providing convenient multi-location u-lock transport.
- Dimensions: 4" x 9" (10.2cm x 22.9cm) - Weight: 3.65 lbs (1.66 kg's)
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Shackle Size12.7mm performance steel shackle with new hardened double-deadbolts to engage both ends increasing holding power. |
Anti-theft ProtectionRegister your product online to activate the optional Anti-theft Protection. In the unlikely event the product is defeated when used properly Kryptonite will pay out up to a certain value depending on the security value of the product. Visit our official website for further information. T&C’s apply. |
Key Safe ProgramRegister your keys online and Kryptonite will ship you 2 keys, globally, in the event you lose them. |
Stainless Steel Keys2 stainless steel keys with ergonomic design to reduce the amount of torque. |
Product information
Technical Details
Additional Information
ASIN | B005YPK8G2 |
---|---|
Customer Reviews |
4.5 out of 5 stars |
Best Sellers Rank | #8,004 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #7 in Bike U-Locks |
Date First Available | February 10, 2009 |
Warranty & Support
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Kryptonite KryptoLok Series 2 Heavy Duty Bicycle U Lock
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Product Description
Replaced with new and improved design in 2017 - check out our New U lock, it will send any bike thief running!. 13mm hardened MAX-PERFORMANCE STEEL SHACKLE resists cutting and leverage attacks. Includes 4’ KRYPTOFLEX™ DOUBLE LOOP CABLE for securing front wheel or accessories. Reinforced HARDENED CROSS BAR DESIGN provides increased protection. HIGH SECURITY DISC-STYLE CYLINDER. Center keyway defends against leverage attacks. ANTI-RATTLE BUMPERS reduce noise during transport. Rotating dustcover protects cylinder. Includes NEW TRANSIT FLEXFRAME-U transportation system which allows for versatile carrying.Protective vinyl coating.2 STAINLESS STEEL KEYS. Key Safe Program.
Compare with similar items
This Item Kryptonite KryptoLok Series 2 Standard Heavy Duty Bicycle U Lock with 4ft Flex Bike Cable | Recommendations | dummy | dummy | dummy | dummy | |
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | -14% $69.00$69.00 Typical: $79.99 | -26% $60.67$60.67 List: $81.95 | $63.95$63.95 | -42% $57.29$57.29 List: $98.95 | -9% $129.65$129.65 List: $142.95 | $89.20$89.20 |
Delivery | Get it as soon as Monday, Apr 8 | Get it as soon as Monday, Apr 8 | Get it as soon as Monday, Apr 8 | Get it as soon as Monday, Apr 8 | Get it as soon as Monday, Apr 8 | Get it as soon as Monday, Apr 8 |
Customer Ratings | ||||||
Easy to lock | 3.9 | 4.2 | — | 4.2 | 4.3 | 4.5 |
Security features | 3.5 | 4.1 | — | 4.6 | 4.6 | 4.0 |
Mounting system | 3.7 | — | — | — | 3.4 | 4.7 |
Lock Feature | 3.7 | 3.2 | — | 3.6 | — | — |
Sturdiness | — | 4.1 | — | 4.6 | 4.4 | — |
Sold By | mochanson sounds | Amazon.com | Amazon.com | mochanson sounds | Amazon.com | Stahlwart |
lock type | U-lock | Key Lock | Combination Lock | Combination Lock | Key Lock | Security U-lock |
number of items | 1 | 1 | 1 | 1 | 1 | — |
material | hardened Performance steel shackle | Alloy Steel | — | Alloy Steel | Alloy Steel | Hardened special steel |
shape | U Shape | U Shape | U Shape | U Shape | U Shape | high German security standard |
finish type | Vinyl | Vinyl | Vinyl | Vinyl Coating | Vinyl Coating | 14 mm hardened special steel |
weight | 1.63 kilograms | 1 kilograms | 1106 grams | 1.6 pounds | 4.45 pounds | 1.5 kilograms |
Important information
Must be at least 18 & over to purchase.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the lock's quality, sturdiness, performance, and value. They mention that it's a great lock, it works well, and is well worth the money. Some like the ease of installation. However, some customers are mixed on portability, size, and mount.
AI-generated from the text of customer reviews
Customers like the lock. They mention it's very secure and made with good material. They also say it'll secure both of your wheels. However, some customers have reported that the lock rusts after rain.
"...can be used in conjunction with the U-lock, which is handy to secure both of your wheels if your bike is going to be left unattended for a long time...." Read more
"...normally mount a lock, but I now like the way it looks, and it feels very stable. I also didn't need to trim the strap for it to fit here." Read more
"...The lock comes with two essential items, the U-bar and the four foot cable. The steel bar is long and wide enough to cover the frame and one tire...." Read more
"...The cable is easy to use, flexible and strong, and helps me lock my bike to my girlfriend's bike so we don't have to bring two locks all the time...." Read more
Customers like the sturdiness of the lock. They say it's high quality, durable, and pick-resistant. They also say it lasts for a long time and is weather-proof.
"...Another positive is the affordability. At $30 you get a strong, sound lock that will do its job...." Read more
"...and frame of my bike at any sort of bike-parking structure, and solid enough to make me feel safe leaving it in a high-traffic area in a big city...." Read more
"...The U-lock feels strong and durable. It is also big enough that I can easily attach both my bike frame and one tire to a bike rack...." Read more
"...The U lock is VERY thick and sturdy. It has an adjustable mount which allows for easy attachment to the mounting bracket...." Read more
Customers are satisfied with the performance of the bike lock. They mention that it works well, is easy to use, and is effective. The U-lock is sturdy and the added 4 ft cable works well when they want further security.
"...I've been using the new lock for a few days and it is working flawlessly. The below pros and cons are representative of each lock...." Read more
"...Outside of that, this lock works well. The U-Lock is long enough to fit around my frame and a post...." Read more
"The lock itself is great as well as the cable and both have worked perfectly for almost a year now with the lock surviving several attempts of..." Read more
"...This lock was easy to use, and obviously effective, but I wish it was a little longer...." Read more
Customers like the value of the lock. They say it's well worth the money, a nice happy medium between price and security, and a good solid locking solution for the money. Some customers also mention that the lock is heavy but worth carrying.
"...These two items sold together are a great team and a great value package...." Read more
"...Another positive is the affordability. At $30 you get a strong, sound lock that will do its job...." Read more
"...The lock is heavy, but worth carrying...." Read more
"...The attachment Kryptonite includes should not be taken lightly.* It is GREAT...." Read more
Customers find the installation of the bike lock relatively straightforward. They mention that the mount is great, easy to put together and take off, and convenient. They also appreciate the cable, connection system, and registration system. Overall, customers are happy with the ease of installation and use of the product.
"...Set up time is minimal as it usually takes less than a minute to install. This lock is also resistant to weather...." Read more
"...The cable is easy to use, flexible and strong, and helps me lock my bike to my girlfriend's bike so we don't have to bring two locks all the time...." Read more
"...This is again extremely irritating if you are on, say, a crowded bike rack and trying to unlock the lock in tight spaces or at odd angles...." Read more
"...Cons:The mounting thingy is easy to install and holds the lock pretty securely. Locks in with a click...." Read more
Customers are mixed about the portability of the outdoor recreation product. Some mention that it's not too heavy and has an integrated cover to protect the lock hole. Others say that it is very heavy and the key looks difficult to duplicate. They also say that the lock is fairly heavy and bulky.
"...While the length and flexibility was nice, it seemed too thin and flimsy, and I was frequently told that bicycle thieves could cut it with ease...." Read more
"...Finally the lock. Its heavy, its beefy, it should be difficult to crack with hand tools...." Read more
"...Cons:- It's heavy. I guess any strong lock is going to be heavy, but it's just a lot heavier than I was expecting...." Read more
"...The only CON is that it is (necessarily) heavy so you need some way to transport it...." Read more
Customers are mixed about the size of the lock. Some mention it's a good size, while others say it'll fit most bike locking spots. Some say it has difficulty mounting it to their bike, while other say it is too big to mount on their bike.
"...As others have mentioned, the bracket is quite large so it sits out a long way from the frame...." Read more
"...The lock is quite large, but it can be easily stored on your bike with the mount leaving no reason to have to carry it around in a bag...." Read more
"...This will mean that the lock will hit the frame when you yank it off unless you are suuuuper careful...." Read more
"...is intended to keep the mount in place falling out, the lock sliding all the way down and becoming wedged in the chain/pedal and essentially causing..." Read more
Customers have mixed opinions about the mount. Some find it great and the mounting hardware works nicely. They also say it comes with a mount to secure it to your bike frame. However, others say the mounting system is the worst and useless. They say there is no good place to mount it on the frame of their bike.
"...The Bracket easily attached to my bike without much work. It feels very secure on my bike frame...." Read more
"...on the lock will not scratch your frame and yes the mounting bracket is a little sketchy, but I mean $35 for a lock is great deal!..." Read more
"...The U lock is VERY thick and sturdy. It has an adjustable mount which allows for easy attachment to the mounting bracket...." Read more
"...Given that the rubber has also now fallen out, this mount is useless as that was the only thing keeping the mount from sliding freely on the frame..." Read more
Reviews with images
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Top reviews
Top reviews from the United States
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For the sake of comparison, my previous bike lock was a cheap plastic-coated cable with a key lock. While the length and flexibility was nice, it seemed too thin and flimsy, and I was frequently told that bicycle thieves could cut it with ease. Additionally, the locking mechanism frequently malfunctioned, making it difficult to unlock it. By contrast, every part of the Kryptonite U-lock is thicker and more robust. It simply looks and feels far more secure than the previous lock. The locking mechanism itself is also far superior. There is a sliding cover to protect the keyhole from the elements, an excellent feature for rainy Corvallis, OR. I have yet to notice any malfunctions or sticking points when unlocking it.
My one minor complaint is that the entire U-shaped portion of the lock completely separates from its base whenever I unlock it. I understand that this ultimately makes it easier to put the lock on more parts of my bike or cover larger distances, but I rarely actually need the lock to completely separate; it would be just fine if it functioned like a normal padlock, with one side of the U-shape pivoting when unlocked. However, this is a minor quibble, and I just have to make sure that I’m holding both parts of the lock before I turn the key all the way.
Anyway, the inclusion of a couple useful accessories outweighs the small “separation” drawback. The sturdy steel cable can be used in conjunction with the U-lock, which is handy to secure both of your wheels if your bike is going to be left unattended for a long time. There is also a small device that attaches to your bike frame, allowing you to easily holster the U-lock when you’re bicycling.
Overall, this Kryptonite U-lock has done its job, and that’s all I can ask for. My bike hasn’t been stolen, and the lock is a huge upgrade over my last one. Finally, although I could have knocked off a star over the annoying issue of the lock separating, there are two useful accessories that easily outweigh the slight inconvenience. 5/5 stars.
The only area of contention with this package is the much-discussed flex bracket. For me it has worked out perfectly, but I hated it at first. As others have mentioned, the bracket is quite large so it sits out a long way from the frame. In addition, the way the lock slides in and out of the bracket requires quite a lot of extra space. For these reasons, I couldn't place it in the central triangle of the bike as I normally would, for fear of bashing the frame when taking the lock in and out of the bracket. However, there is a fair amount of flexibility in the way your lock is pointing when sat in the bracket, which allows for a lot of experimentation in where to put it. I tried A LOT of different placements and most of them just didn't look good and/or caused the lock to rub on my legs when pedaling. I was just about to give up when I found a position which works well on my bike. I've had no problems with the bracket slipping at all, and am very happy with the purchase. For this reason I give it 5 stars, but I can imagine how others with different models of bike would not have similar luck, and would be very frustrated and disappointed.
For information: I have a Trek 7.2fx, and the position I found was at the front end of the cross bar, in front of the break cable (just before it threads out of the tube). The bracket is mounted on the right side of the cross bar (bracket pointing horizontal), with the lock pointing diagonally back and down towards the pedals. Due to the triangular shape of the cross bar here, the bracket sits well against it and doesn't slip. And due to the shape and balance of the lock, the way it is angled is how it would naturally dangle if you balanced it on your hand. This means that the bracket is not trying to fight to keep the lock upright, and therefore adding to the stability.
It's not where I would normally mount a lock, but I now like the way it looks, and it feels very stable. I also didn't need to trim the strap for it to fit here.
Top reviews from other countries
重くてそれなりの大きさですが、それは最初から分かっていた事なので問題無しです。
リュックに入れて走ってるのですが、重量で肩と背中にきますw
premetto che è un ottimo deterrente a prescindere, rispetto ad una qualsiasi catena o lucchetto a combinazione dà una sensazione di sicurezza e solidità che non tutti i lucchetti offrono, ma si sa, con un po' di tempo e i giusti attrezzi nessun lucchetto è infallibile.
Ma veniamo al sodo. Ho lasciato la bici in strada legata ad un palo per tutta la notte, purtroppo non avevo modo di metterla in un luogo più sicuro. Il mattino dopo, riprendendola, ho chiaramente notato il TENTATO e NON RIUSCITO furto. Ho sempre legato la bici sia con il lucchetto a U che con il cavo, prendendo palo, telaio e ruota posteiore con il tubo a U e facendo il giro della ruota anteriore e del telaio con il cavo.
L'unica cosa che son riusciti a fare è stato tagliare il cavo. Poco male, con 13€ l'ho ricomprato nuovo dal ciclista, ma avevo ancora la mia bici legata saldamene al palo.
Nonostante i tentativi fatti dai ladri ha resistito egregiamente. L'ho riaperto con la chiave senza il minimo sforzo e ho controllato che il meccanismo funzionasse ancora bene e che non ci fossero danni: era come nuovo, solo qualche graffio e il pezzo di plastica nero che ricopre il nottolino aveva evidenti segni di martellate e adesso gira di 360° invece che di soli 90°.
Il lucchetto ha funzionato talmente bene che i disgraziati che hanno tentato i rubarmi la bici hanno perfino provato a bucare il marciapiede per sflare il palo a cui era legata (dei GENI, come se non avesse un basamento e fosse infilato come uno stuzzicadenti in un tramezzino, ma ovviamente da gente simile non mi aspetto un QI particolarmente più eleato di quello di un sasso) per portarsela via.
L'unica cosa che sono riusciti ad ottenere è essere responsabili di un danno ad un bene comune per tentare di rubare una bici che vale poche decine di euro.
Per la mia esperienza questo lucchetto è davvero stra consigliato. Kryptonite è una sicurezza.
Le produit est lourd et encombrant mais inspire confiance. Aucun problème de fermeture ou ouverture comme j'ai pu le lire sur différents avis : il suffit de bien enfoncer la clé à fond. Je le transporte dans mon sac à dos car la fixation fournie ne m'inspire pas confiance et, critère plus personnel, je trouve que ce n'est pas très esthétique (si c'est pour usage purement utilitaire type velotaf, ce n'est pas un critère bien important, je vous l'accorde).
N'étant pas habitué à utiliser les antivols U, il faut parfois batailler un peu pour trouver le meilleur positionnement de l'antivol et du vélo pour pouvoir sécuriser à la fois la roue arrière, le cadre et la roue avant mais jusqu'à maintenant j'y suis toujours arrivé.
Je pense que c'est un produit sérieux à un budget maîtrisé, qui aura un rôle très dissuasif et protègera votre vélo contre les voleurs non équipés d'outillage lourd. Kryptonite évalue la sécurité de cet antivol à 6/10. Sold secure le classe "silver" ce qui est tout à fait respectable.
Néanmoins, pour les stationnements de longue durée dans des endroits à risque ou pour des vélos de grande valeur, je conseillerais de le doubler ou de partir sur quelque chose de plus imposant encore, histoire de ralentir au maximum les potentiels voleurs qui, s'ils sont dotés d'équipements adaptés, arriveront malheureusement toujours à leur fin.
The bracket is included, which isnt exactly stated on the description but in other reviews and questions/answers you will see tha it is included, but would have been nice to see that on the description.
Instructions and equipment all intact and easy to assemble the bracket onto the bike, after a few attempts. But there is plenty of youtube videos to help you.
This purchase gives you Anti-Theft cover from Kryptonite. All you have to do is register the purchase on the Kryptonite website and it is FREE of charge to do so. Giving you 1 year of cover against theft.
Considering the make and model, this price was very shocking (in a good way). My expectations of this sort of lock, of this calibre and strength would be much more expensive. I would totally recommend this product. The only thing i would not recommend is going into a local bike shop and buying their D/U locks, as I think you will be ripped off.
It has a flat/square key included for this lock, so do not fret in regards to the reent findings of the round key locks being highly alble to be broken into with a "bic pen" as seen on youtube. You don't and shouldnt have this problem with this lock.
The cable, in my opinion, is much too short, isnt the best length to go through the bike, wheel and onto a bike rack for ectra security. A longer cable is definitely required for that extra security.
Feels very strong and durable. Rather heavy but that should be seen as a good thing! Quite impressed.