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Kryptonite Kryptolok Standard Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 12.7mm Shackle with Mounting Bracket and Keys, High Security Lock for Bicycles Scooters,Black

4.5 4.5 out of 5 stars 775 ratings
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Pattern Name: Bike U-Lock
Style: Standard
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Purchase options and add-ons

Brand Kryptonite
Special Feature Weather Resistant
Lock Type U-Lock
Item dimensions L x W x H 9.02 x 4.02 x 0.51 inches
Material Alloy Steel

About this item

  • HIGH-SECURITY DESIGN: Made from a 12.7mm hardened performance steel shackle, this bike lock provides excellent resistance against cutting and leverage attacks
  • PATENTED LOCKING SYSTEM: Features a patented hardened double deadbolt design that gives additional protection against twist attacks, with a high-security disc-style cylinder, resistant to picking and drilling
  • MULTI-FUNCTIONAL: This Kryptonite bike lock is ideal to secure your bicycles, sports equipment, gates and fences, tool boxes & ladders, grills & lawnmowers, skateboards, truck bed and more
  • SPECIFICATIONS: U-Lock interior locking dimensions are 4 in. x 9 in, 12.7mm steel shackle with a weight of 2.9 lbs. Includes two stainless steel keys with an ergonomic design
  • PROTECTIVE FEATURES: Durable vinyl coating around the shackle helps prevent scratching and wear and tear on your bike. The high-security disc-style cylinder keyway is protected by a sliding dust cover and is pick and drill resistant
  • EASY TRANSPORT with FLEXFRAME-U BRACKET: Includes a versatile FlexFrame U-bracket for quick and secure mounting to your bike frame, ensuring convenient transport without the need for a bag or backpack
  • OPTIONAL ANTI-THEFT PROTECTION: Eligible for Kryptonite’s Anti-Theft Protection Offer (ATPO) up to $1,750 coverage for registered locks

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Amazon's Choice
4.6 out of 5 stars (2967)
$11.56

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$56.08
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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 Standard U-Lock

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: 2.9 lbs (1.32 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.

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Kryptonite Kryptolok Standard Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 12.7mm Shackle with Mounting Bracket and Keys, High Security Lock for Bicycles Scooters,Black

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Product Description

The Kryptonite Kryptolok Standard U-Lock features a 12.7 mm hardened performance steel shackle with a double deadbolt anti-rotation design that resists bolt cutters and twisting leverage attacks. The lock’s disc-style cylinder with center keyway is protected by a vinyl coating and is pick and drill resistant. The keyway also features a sliding dust cover to protect the cylinder from dirt and debris when not in use. It includes two stainless steel keys with an ergonomic design to reduce torque and keep them from bending or breaking. Rated at a 6 / 10 on our security scale, the Kryptolok Standard is good for quick stops in a metropolitan area, a couple hours in the suburbs, or all day & overnight in rural areas. It also includes our patented FlexFrame-U Bracket providing convenient multi-location U-Lock transport. The combination of these great features and our support programs including Key Safe, Anti-Theft Protection..

Top Brand: Kryptonite

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Kryptonite Kryptolok Standard Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 12.7mm Shackle with Mounting Bracket and Keys, High Security Lock for Bicycles Scooters,Black
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Price-16% $56.08
List: $66.95		-13% $59.36
List: $67.95		-28% $106.95
List: $148.95		$67.95$35.99
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Customer Ratings
4.54.5 out of 5 stars775
4.54.5 out of 5 stars745
4.74.7 out of 5 stars2,659
4.04.0 out of 5 stars53
4.54.5 out of 5 stars2,799
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  2. USHAKE
    Bike U lock Durability. Aside from its intricate style, the material used is zinc alloy. This particular kind of metal can resist active leverage attacks sharp objects such as cutters. Not only that, but it also weighs 3.7 pounds for maximum security. Easy to Set. Like taking candy from a baby, setting the lock is surprisingly quick with only three steps. Open the hatch, flip the switch, and set your code. Multi-purpose. Aside from bicycles, the Ushake U lock can also be used for scooters, motorcycles or any other two-wheeled vehicle. Key-Free. Set a code that you can easily remember, and you’ll never have to worry about losing a key again Combination. Its dial numbers are smooth for turning for you to set up your four-digit code easily. It also comes with a “reset” button that you can only access with a couple of turns from a Philip screwdriver. However, you will still need to set the correct password to push the button from A to B. With a simple push; you can now reset your code.
    See more Posts >
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Customer reviews

4.5 out of 5 stars
775 global ratings

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Customers say

Customers appreciate the lock's solid build quality, functionality, and value for money. They find it secure, easy to use, and a good value for the price. However, some customers are unhappy with the lock's sensitivity. There are mixed opinions on lock functionality, key difficulty, and size.

AI-generated from the text of customer reviews

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Build qualityFunctionalityValue for moneyEase of useLock functionalityKey difficultySizeSensitivity
27 customers mention "Build quality"19 positive8 negative

Customers appreciate the lock's solid build quality. They find it sturdy, secure, and easy to use. The lock is a high-quality U-lock that performs as advertised. The reputable brand deters thieves and fits securely on provided attachment points.

"...and its nice and long, easy to turn once you figure it out and very sturdy...." Read more

"...This lock is sturdy, easy to use, and very secure. I've been using it for a few weeks now and I have no complaints...." Read more

"Strong and dependable lock. I bought this for my daughter to prevent her bike from “disappearing” on her college campus...." Read more

"...The only negative is the holder will shake loose so i put the lock in my pack to transport it." Read more

16 customers mention "Functionality"13 positive3 negative

Customers like the lock's functionality. They say it works well, is sturdy, and of good quality for the price. The lock is long and easy to turn once.

"...It took 100.00 to repair my bike and get this lock, and its nice and long, easy to turn once you figure it out and very sturdy...." Read more

"This works quite well as no one has stolen my bicycle so far...." Read more

"Works well" Read more

"...Works well for any college campus or city goer." Read more

10 customers mention "Value for money"10 positive0 negative

Customers appreciate the value for money of the lock. They find it sturdy and good quality for the price.

"...Should it last as long or longer then it's worth the cost. Actually, it's worth the price in protection against bicycle theft...." Read more

"...It's worth every penny!" Read more

"The steel U is a bit thinner, but it is good for the price range. Works well for any college campus or city goer." Read more

"This is a serious lock for fifty bucks...." Read more

5 customers mention "Ease of use"5 positive0 negative

Customers find the lock easy to use. It's long and turns smoothly once you figure it out.

"...100.00 to repair my bike and get this lock, and its nice and long, easy to turn once you figure it out and very sturdy...." Read more

"...This lock is sturdy, easy to use, and very secure. I've been using it for a few weeks now and I have no complaints...." Read more

"Easy to use, two keys and appreciated the u lock rack attachment so I have a logical place to put the lock while biking." Read more

"Safe, simple, and durable..." Read more

43 customers mention "Lock functionality"27 positive16 negative

Customers have mixed opinions about the lock's functionality. Some say it looks sturdy and provides better security than a cable lock, with two keys and an attachment point for a logical place to lock it. Others mention issues with the key not turning to unlock the lock or the lock not opening even when the key is fully engaged.

"...Actually, it's worth the price in protection against bicycle theft. I don't live in a city like Los Angeles or New York...." Read more

"...It fits my bike perfectly and it doesn't scratch or damage it. It also comes with two keys, which is very convenient...." Read more

"the included storage attachment is very stiff and hard to get the lock in and out of." Read more

"Strong and dependable lock. I bought this for my daughter to prevent her bike from “disappearing” on her college campus...." Read more

9 customers mention "Key difficulty"6 positive3 negative

Customers have mixed opinions about the lock key. Some find it great, with two keys, frame mount, and lock included. They appreciate the covered key lock area to keep out debris and salt air corrosion. However, others mention that turning the key can be a struggle, the key is difficult to insert, and the keyway is terrible.

"...It also comes with two keys, which is very convenient. I feel much safer leaving my bike outside with this lock on...." Read more

"...I've reduced my rating from four starts to two because the difficulty of turning the key makes this lock unusable for many of my practical purposes...." Read more

"...The lock comes with 2 keys, and I’ve never had an issue locking or unlocking with them...." Read more

"It's a kryptonite lock, works as expected. Like the key lock area is covered to keep out debris and salt air corrosion." Read more

9 customers mention "Size"6 positive3 negative

Customers have different views on the lock's size. Some find it versatile and suitable for one bike, with a long shank that secures their new e-bike without having to attach anything. Others consider it too big for some bikes and overkill for one bike.

"...It took 100.00 to repair my bike and get this lock, and its nice and long, easy to turn once you figure it out and very sturdy...." Read more

"...It fits my bike perfectly and it doesn't scratch or damage it. It also comes with two keys, which is very convenient...." Read more

"...The bigger locks can work for two bikes but are overkill for one bike...." Read more

"...I think it will be big enough to loop through the frame, rear wheel, and detached front wheel with an immovable secure object...." Read more

6 customers mention "Sensitivity"0 positive6 negative

Customers find the lock's sensitivity frustrating. They say it gets stuck, jammed, and is difficult to push the key far enough into the lock.

"...Gets Stuck Every Time: The most infuriating issue with the Kryptonite Kryptolok is its infuriating habit of getting stuck when I try to unlock it...." Read more

"...Sometimes it's so finicky I just want to walk away and leave my bike unlocked instead of taking the time to jiggle things until it turns...." Read more

"Works gets the job done but gets stuck a lot. Wastes time and frustrating...." Read more

"...It has been insanely difficult for me to shove the key far enough into the keyway despite only using the lock for a few days...." Read more

Robbers Use a bolt cutter and just left a scratch
5 out of 5 stars
Robbers Use a bolt cutter and just left a scratch
This lock protects my trike from Robbers multiple times. I have a well-built and expensive electric trike that uses only kryptonite u-lock and heavy-duty chan lock plus; the company has critical protection and anti-thief for the higher levels. When robbers strike cut the lock, it only leaves a good scratch mark on the mental part of the lock. U
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Top reviews from the United States

  • Amadeus
    5.0 out of 5 stars Yeah, as they are writing, its a really good lock
    Reviewed in the United States on April 7, 2024
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    after a hoodrat tried desperately to steal my bike, he found he couldnt and began to destroy my brakes and dent the parts to my bike. I was appalled but I took it in stride. I had just walked into amazon fresh in pasadena to get some items, not realizing someone was ruining my bike outside. I came out and tried to unlock it and it was jammed! The criminal sat on a bus bench and didnt even leave!! altho, he covered his face w/ his hands! I had to go back into amazon fresh and ask for assistant. A guy in the back got BOLT CUTTERS. He just happened to have them, because he said "when employees leave they lock the storages". He broke through my severely damaged ulock offbrand that I bought here on amazon. I then realized the creep had hurt my front wheel so badly i had to drag it all the way home! I literally had to walk my bike home. I went back in and asked him to help me to make my front tire move!

    Thanks to the guy at the Amazon Fresh in Pasadena who was very helpful. You should tho have a bike area to lock your bike CLEARLY IN FRONT OF THE STORE and not off way to the side. This probably would have NEVER HAPPENED if you knew where to places to lock your bike.
    Which brings me to this lock. It took 100.00 to repair my bike and get this lock, and its nice and long, easy to turn once you figure it out and very sturdy.
    I will never lock my bike by far from a store. I will never lock my bike by a bus bench. I will never be out after 10 and LEAVE my bike locked where criminal element surely can exist.
    4 people found this helpful
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  • Terry Parris
    5.0 out of 5 stars Best U-lock Made
    Reviewed in the United States on December 3, 2024
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    I purchased this as a replacement for a 5 year old version which sadly was going belly up. My first purchase of this type of lock was through a different store other than Amazon and I paid approximately $20 plus tax. Inflation has obviously taken it's toll as the new one was almost 3 times the cost of the original. It appears to be the same quality though. Should it last as long or longer then it's worth the cost. Actually, it's worth the price in protection against bicycle theft. I don't live in a city like Los Angeles or New York. I live in a city of approximately 100K. Bike theft here is real. I've known people with cable locks have their bicycles stolen. My recommendation for a bicycle lock is a U-lock. Preferably a Kryptonite like this one or one of their higher quality ones meant for larger cities. It may be heavy to carry around without the provided carrier, but it's better safe and sound then seeing a high end bike be stolen with lesser locks. I personally have ridden bike exclusively for over 24 years now. My recommendations for locks are U-lock, cable lock, then chain link if nothing else.U-lock being the toughest and chain link being the weakest.
    One person found this helpful
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  • Rodons
    5.0 out of 5 stars Big light bike locker
    Reviewed in the United States on November 8, 2023
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    I bought this bike lock after reading a recommendation from a friend, and I'm so glad I did. This lock is sturdy, easy to use, and very secure. I've been using it for a few weeks now and I have no complaints. It fits my bike perfectly and it doesn't scratch or damage it. It also comes with two keys, which is very convenient. I feel much safer leaving my bike outside with this lock on. I highly recommend this product to anyone looking for a reliable bike lock. It's worth every penny!
    2 people found this helpful
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  • yanay
    4.0 out of 5 stars the storage holder is very stiff
    Reviewed in the United States on March 13, 2024
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    the included storage attachment is very stiff and hard to get the lock in and out of.
    Helpful
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  • Angela F
    5.0 out of 5 stars Kryptonite lock
    Reviewed in the United States on March 14, 2024
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    Strong and dependable lock. I bought this for my daughter to prevent her bike from “disappearing” on her college campus. Much better than the standard cable lock.
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  • Glenn Yamasaki
    5.0 out of 5 stars I still have the bike.
    Reviewed in the United States on January 17, 2024
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    This works quite well as no one has stolen my bicycle so far. The only negative is the holder will shake loose so i put the lock in my pack to transport it.
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  • Teri
    5.0 out of 5 stars Study in Boston
    Reviewed in the United States on November 5, 2023
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    reputable brand deters thief. Fits secure on provided attachment point. No room for accidental removal while riding.
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  • RajunCajun
    1.0 out of 5 stars A Disastrous Choice: Kryptonite Kryptolok Bike Lock
    Reviewed in the United States on October 8, 2023
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    My experience with this lock has been nothing short of a nightmare. Here are the reasons why I cannot recommend this product:

    Gets Stuck Every Time: The most infuriating issue with the Kryptonite Kryptolok is its infuriating habit of getting stuck when I try to unlock it. It's supposed to be a quick and convenient way to secure my bike, but more often than not, I find myself wrestling with it for far too long. This not only wastes my time but also leaves me worried that I'll be stuck somewhere, unable to unlock my bike when I need it the most.

    Scratches Bike Frame: I don't use the included bike mount. However, the aluminum buckle is not removable and consistently scratches my bike while riding.

    Lock Scuffs Easily: To make matters worse, the Kryptolok itself is prone to unsightly scuffs and blemishes. It looks like it's been through a war zone after just a few weeks of use.

    In summary, the Kryptonite Kryptolok bike lock has been a massive disappointment. Its tendency to get stuck, scratch my bike frame, and scuff easily has left me frustrated and regretful of my purchase. I would strongly advise anyone in need of a reliable bike lock to look elsewhere and invest in a product that will actually keep your bike safe without causing more problems than it solves.
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    RajunCajun
    1.0 out of 5 stars
    A Disastrous Choice: Kryptonite Kryptolok Bike Lock

    Reviewed in the United States on October 8, 2023
    My experience with this lock has been nothing short of a nightmare. Here are the reasons why I cannot recommend this product:

    Gets Stuck Every Time: The most infuriating issue with the Kryptonite Kryptolok is its infuriating habit of getting stuck when I try to unlock it. It's supposed to be a quick and convenient way to secure my bike, but more often than not, I find myself wrestling with it for far too long. This not only wastes my time but also leaves me worried that I'll be stuck somewhere, unable to unlock my bike when I need it the most.

    Scratches Bike Frame: I don't use the included bike mount. However, the aluminum buckle is not removable and consistently scratches my bike while riding.

    Lock Scuffs Easily: To make matters worse, the Kryptolok itself is prone to unsightly scuffs and blemishes. It looks like it's been through a war zone after just a few weeks of use.

    In summary, the Kryptonite Kryptolok bike lock has been a massive disappointment. Its tendency to get stuck, scratch my bike frame, and scuff easily has left me frustrated and regretful of my purchase. I would strongly advise anyone in need of a reliable bike lock to look elsewhere and invest in a product that will actually keep your bike safe without causing more problems than it solves.
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Top reviews from other countries

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  • Gordon Wood
    5.0 out of 5 stars So good I bought one for wife’s bike
    Reviewed in Canada on June 7, 2024
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    I’ve had this lock for years. So, I bought the same for my wife’s new bike. Solid build and easy to install. It’s a great deterrent to thieves…not a fan of chains…too cumbersome. This lock tucks in and out of the way 👍
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    Gordon Wood
    5.0 out of 5 stars
    So good I bought one for wife’s bike

    Reviewed in Canada on June 7, 2024
    I’ve had this lock for years. So, I bought the same for my wife’s new bike. Solid build and easy to install. It’s a great deterrent to thieves…not a fan of chains…too cumbersome. This lock tucks in and out of the way 👍
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  • Judith
    5.0 out of 5 stars All good
    Reviewed in the United Kingdom on December 25, 2024
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    Easy to use
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  • Client d'Amazon
    1.0 out of 5 stars A éviter
    Reviewed in France on December 5, 2019
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    Dès le début, une seule clé fonctionne et pas super bien encore. C'est mon 1er achat de cette marque est bien je suis ultra déçu. Je déconseille
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  • Erica
    5.0 out of 5 stars Super
    Reviewed in Spain on August 28, 2019
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    El mejor que he tenido .
    Súper seguro .
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  • Flavio
    5.0 out of 5 stars Buon lucchetto ad U
    Reviewed in Italy on August 14, 2019
    Pattern Name: Bike U-LockStyle: StandardVerified Purchase
    Montato in 10 minuti il supporto,qualche regolazione e via. Sembra essere di buona fattura e ben resistente. Certo io lo utilizzo su di una bici da meno di 200 euro quindi va benissimo,si integra perfettamente sul telaio senza dare troppi problemi,un po' pesante,ma significa anche che è robusto,lo consiglio chi come me deve usare la bici in città per andare a fare la spesa o andare a lavoro.
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    Flavio
    5.0 out of 5 stars
    Buon lucchetto ad U

    Reviewed in Italy on August 14, 2019
    Montato in 10 minuti il supporto,qualche regolazione e via. Sembra essere di buona fattura e ben resistente. Certo io lo utilizzo su di una bici da meno di 200 euro quindi va benissimo,si integra perfettamente sul telaio senza dare troppi problemi,un po' pesante,ma significa anche che è robusto,lo consiglio chi come me deve usare la bici in città per andare a fare la spesa o andare a lavoro.
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