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Kryptonite KryptoLok Series 2 Standard Heavy Duty Bicycle U Lock with 4ft Flex Bike Cable

4.5 4.5 out of 5 stars 6,180 ratings

To see product details, add this item to your cart. You can always remove it later.
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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

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

Customer ratings by feature

Easy to lock
3.9 3.9
Mounting system
3.7 3.7
Lock Feature
3.7 3.7
Security features
3.5 3.5

Frequently bought together

$69.00
Get it as soon as Monday, Apr 1
In Stock
Sold by mochanson sounds and ships from Amazon Fulfillment.
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Kryptonite KryptoLok Series 2 Standard Heavy Duty Bicycle U Lock with 4ft Flex Bike Cable
Kryptonite KryptoLok Series 2 Standard Heavy Duty Bicycle U Lock with 4ft Flex Bike Cable
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Kryptonite Heavy Duty Key Lock, Black/Yellow, 4in x 8in, Anti-Theft Protection Included
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Price-14% $69.00
Typical:$79.99
-32% $63.57
List:$92.95
-26% $60.50
List:$81.95
-9% $58.19
List:$63.95
-42% $57.23
List:$98.95
$139.99
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Easy to lock
3.9
4.6
4.2
4.2
4.3
Security features
3.5
4.5
4.1
4.6
4.6
Lock Feature
3.7
3.6
3.2
3.6
Sturdiness
4.3
4.1
4.6
4.4
Mounting system
3.7
3.7
3.4
Sold By
mochanson sounds
Amazon.com
mochanson sounds
Amazon.com
mochanson sounds
mochanson sounds
lock type
U-lock
Key Lock
Key Lock
Combination Lock
Combination Lock
Key Lock
number of items
1
1
1
1
1
1
material
hardened Performance steel shackle
Alloy Steel
Alloy Steel
Alloy Steel
shape
U Shape
U Shape
U Shape
U Shape
U Shape
U Shape
finish type
Vinyl
Vinyl
Vinyl
Vinyl
Vinyl Coating
Vinyl Coating
weight
1.63 kilograms
1.3 kilograms
1 kilograms
1106 grams
1.6 pounds
4.45 pounds

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)

.

.

.

Shackle Size

12.7mm performance steel shackle with new hardened double-deadbolts to engage both ends increasing holding power.

Anti-theft Protection

Register 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 Program

Register your keys online and Kryptonite will ship you 2 keys, globally, in the event you lose them.

Stainless Steel Keys

2 stainless steel keys with ergonomic design to reduce the amount of torque.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
For warranty information about this product, please click here [PDF ]

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Kryptonite

Kryptonite KryptoLok Series 2 Standard Heavy Duty Bicycle U Lock with 4ft Flex Bike Cable


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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.

Important information

Legal Disclaimer

Must be at least 18 & over to purchase.

Customer reviews

4.5 out of 5 stars
4.5 out of 5
6,180 global ratings

Customers say

Customers like the quality, performance, and value of the bike lock. For example, they mention it's easy to install, works well, and is of high quality. Some appreciate the ease of use and the fact that it'll last for a long time. That said, opinions are mixed on portability, size, and mount.

AI-generated from the text of customer reviews

1,076 customers mention880 positive196 negative

Customers like the lock. They say it's very secure, made with good material, and easy to use. They also say it helps them lock their bike to their girlfriend's bike. However, some customers report that the lock rusts after rain. The lock mechanism is smooth and doesn't bind up. Overall, most are satisfied with the lock's functionality and durability.

"...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

639 customers mention546 positive93 negative

Customers like the sturdiness of the lock. They say it's high quality, well-made, and durable. Customers also say that the lock is designed to be pick-resistant and last for a long time.

"...Another positive is the affordability. At $30 you get a strong, sound lock that will do its job...." 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

"...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

300 customers mention276 positive24 negative

Customers are satisfied with the performance of the bike lock. They mention that it is easy to attach to their bike, and is effective. They also appreciate the added 4 ft cable for added security. Overall, customers are happy with their purchase and recommend it to others.

"...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

290 customers mention231 positive59 negative

Customers like the value of the bike lock. They say it's a nice happy medium between price and security, and a good solid locking solution for the money. 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

243 customers mention171 positive72 negative

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 has a rubbery coating. They also appreciate the easy-to-use connection system and the rubbery cable. Customers also like that it's easy to register the keys online for quick replacement if lost. Overall, they find the product to be convenient and easy to use and carry on their bike.

"...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

316 customers mention109 positive207 negative

Customers are mixed about the portability of the lock. Some mention that it's not too heavy, while others say that it is very heavy and the key looks difficult to duplicate. The lock is fairly heavy but it does feel very sturdy. However, some customers also mention that the lock is bulky and hard to carry on.

"...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

238 customers mention89 positive149 negative

Customers are mixed about the size of the lock. Some mention that it's a good size, while others say that it is too big to mount on their bike. They say that the lock is difficult to secure the lock holder, and the lock doesn't fully slide into the bracket.

"...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

201 customers mention101 positive100 negative

Customers are mixed about the mount. Some mention it's great, and the mounting hardware works nicely. However, others say that it'll take up a lot of room and the mount is useless.

"...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

Lock cutted under 7 seconds!
1 Star
Lock cutted under 7 seconds!
$1500 guarantee is a scam. I bought this lock because of the high amazon reviews but if you look beyond the stars and read each of the review you may not find as much confidence buying this product. I thought a company that is willing to pay up to $1500 for your stolen bike must be a great product that has never seen a stolen bike but turns out its just all a marketing gimmick. As you can see from all the pictures of people's stolen bikes/cut locks here, you'd think twice before even thinking about locking up your investment with this lock. My lock was cut in under 7 seconds at a bart station inside the paid area right under the camera. The guy obviously know he can cut it quick before making an attempt like this. He got off the train, went up to the bike area, cut my lock, took my electric scooter and run back down to catch a boarding train. He used battery operated power tools, dont even need to plug in. Thats how easy it was. I read the other reviews here, so many people have the same misconception i had of this product providing security, it is a false sense of security. This company does not stand behind their product when it counts. They just ignore you until you escalate using social media and then you get a call back but just to tell you the same thing. They do not acknowledge their product being inadequate for what it was made and sold for and they do not stand behind their $1500 guarantee as there is fine prints which made it impossible to claim. Buyer beware.
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5.0 out of 5 stars Non c'è di meglio, ha resistito al furto!!!!
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