Kryptonite Kryptolok U-Lock - Black/Silver
Bicycle security for moderate to high crime areas, with a ATB wide shackle. 13mm hardened Performance steel shackle helps resist cutting and leverage attacks. New patent pending hardened double deadbolt design gives additional protection against twist attacks. High security disc-style cylinder is pick and drill resistant. Anti-Rattle bumpers keeps the shackle snug against the crossbar and prevent unnecessary noise. The Transit FlexFrame-U mounts quickly and easily and supports the transportation of the most common u-lock sizes. The Flex Frame-U fits bicycle frame tubing 25mm to 80mm whether round, oval, triangular or square shapes. The mounting system allows for 360 degree rotation providing the ability to micro-adjust the lock angle to better fit and align with a bike frames specific geometry. Rotating dustcover over cylinder protects from dirt and grime. Vinyl coated and weatherproof.
Bicycle security for moderate to high crime areas, with a ATB wide shackle. 13mm hardened Performance steel shackle helps resist cutting and leverage attacks. New patent pending hardened double deadbolt design gives additional protection against twist attacks. High security disc-style cylinder is pick and drill resistant. Anti-Rattle bumpers keeps the shackle snug against the crossbar and prevent unnecessary noise. The Transit FlexFrame-U mounts quickly and easily and supports the transportation of the most common u-lock sizes. The Flex Frame-U fits bicycle frame tubing 25mm to 80mm whether round, oval, triangular or square shapes. The mounting system allows for 360 degree rotation providing the ability to micro-adjust the lock angle to better fit and align with a bike frames specific geometry. Rotating dustcover over cylinder protects from dirt and grime. Vinyl coated and weatherproof.
Bicycle security for moderate to high crime areas, with a ATB wide shackle. 13mm hardened Performance steel shackle helps resist cutting and leverage attacks. New patent pending hardened double deadbolt design gives additional protection against twist attacks. High security disc-style cylinder is pick and drill resistant. Anti-Rattle bumpers keeps the shackle snug against the crossbar and prevent unnecessary noise. The Transit FlexFrame-U mounts quickly and easily and supports the transportation of the most common u-lock sizes. The Flex Frame-U fits bicycle frame tubing 25mm to 80mm whether round, oval, triangular or square shapes. The mounting system allows for 360 degree rotation providing the ability to micro-adjust the lock angle to better fit and align with a bike frames specific geometry. Rotating dustcover over cylinder protects from dirt and grime. Vinyl coated and weatherproof.
Bicycle security for moderate to high crime areas, with a ATB wide shackle. 13mm hardened Performance steel shackle helps resist cutting and leverage attacks. New patent pending hardened double deadbolt design gives additional protection against twist attacks. High security disc-style cylinder is pick and drill resistant. Anti-Rattle bumpers keeps the shackle snug against the crossbar and prevent unnecessary noise. The Transit FlexFrame-U mounts quickly and easily and supports the transportation of the most common u-lock sizes. The Flex Frame-U fits bicycle frame tubing 25mm to 80mm whether round, oval, triangular or square shapes. The mounting system allows for 360 degree rotation providing the ability to micro-adjust the lock angle to better fit and align with a bike frames specific geometry. Rotating dustcover over cylinder protects from dirt and grime. Vinyl coated and weatherproof.
in 9 offers
The lowest price for Kryptonite Kryptolok U-Lock - Black/Silver right now is $85.14 at Varuste.net, compared across 9 retailers.
The all-time low was $68.19 on 24 Feb 2025 — today's price is 25% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 12 May 2026.
Last updated at 12/05/2026 03:51:08
Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Kryptonite New-U Kryptolok ATB
Delivery $40.48
Kryptonite Kryptolok Atb With Flexframe U Bracket U-lock Black 229 x 127 x 13 mm
Delivery $42.49
Kryptonite KryptoLok ATB Bike Lock - black/polished
Delivery $58.45
Kryptonite Kryptolok Series 2 Atb U-lock 12.7cm X 22.9cm Black
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Kryptonite Kryptolok Series 2 ATB U-Lock 12.7cm x 22.9cm Black
Delivery between Wed – Mon $9.90
Kryptonite KryptoLok Series 2 ATB/MTB Key U-Lock (Wide Shackle)
Kryptonite Kryptolok Standard Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 12.7mm
Delivery between 16–20 May $16.52
Kryptonite Kryptolok Standard Bike U-Lock, Heavy Duty Anti-Theft Bicycle U Lock, 12.7mm
Delivery between 17–21 May $14.08
originally posted on walmart.com
Great lock! Big enough to lock the bike frame and wheel to a pole, which is what I needed. This is the classic Kryptonite lock, lasts forever, almost indestructible. Highly recommend.
originally posted on walmart.com
Seems to be very good quality. My biggest beef is figuring out just exactly how the combination lock works. It probably took me a good 20 minutes to get it right that the only reason I gave it a 4 star rating. It it heavy and looks to be a good lock. I haven’t tried it yet. I was hoping it would work on a horse trailer I have but it didn’t. I can use it on a bike or something else I’m sure
originally posted on walmart.com
This "U" styled lock is very rigid and durable leaving me feeling satisfied with my bike being secured. Always wanting to try the Kryptonite Kryptolock, I was a bit skeptical to try something new. The lock is heavy than it seems, but not overly. The weight let's you know that it's there with purpose, and that's to protect your bike. I am very satisfied. I've made my own theft deterrent chains over the years, but this U lock is going to be my go to lock for securing my $600 bike. As riding has become the norm in my area over the passed few years, so has bicycle theft. This lock takes that fear away.
| Lock type | Key Lock |
| Item dimensions L x W x H | 8 x 3 x 3 centimetres |
| Finish Types | Vinyl |
| Item Dimensions | 8 x 3 x 3 centimetres |
| Recommended Uses For Product | Cycling |
Kryptonite Kryptolok 12.7mm U-Lock with FlexFrame-U Bracket
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Kryptonite New-U Kryptolok ATB
Delivery $40.48
Kryptonite Kryptolok Atb With Flexframe U Bracket U-lock Black 229 x 127 x 13 mm
Delivery $42.49
Kryptonite KryptoLok ATB Bike Lock - black/polished
Delivery $58.45
Kryptonite Kryptolok Series 2 Atb U-lock 12.7cm X 22.9cm Black
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Great lock! Big enough to lock the bike frame and wheel to a pole, which is what I needed. This is the classic Kryptonite lock, lasts forever, almost indestructible. Highly recommend.
Seems to be very good quality. My biggest beef is figuring out just exactly how the combination lock works. It probably took me a good 20 minutes to get it right that the only reason I gave it a 4 star rating. It it heavy and looks to be a good lock. I haven’t tried it yet. I was hoping it would work on a horse trailer I have but it didn’t. I can use it on a bike or something else I’m sure
This "U" styled lock is very rigid and durable leaving me feeling satisfied with my bike being secured. Always wanting to try the Kryptonite Kryptolock, I was a bit skeptical to try something new. The lock is heavy than it seems, but not overly. The weight let's you know that it's there with purpose, and that's to protect your bike. I am very satisfied. I've made my own theft deterrent chains over the years, but this U lock is going to be my go to lock for securing my $600 bike. As riding has become the norm in my area over the passed few years, so has bicycle theft. This lock takes that fear away.
Kryptolock is highly reviewed for its resistance to cutting tools and is, in my opinion, the best in its price range, but I was happy to find the key lock smooth and efficient. It has a sliding cover to resist rain. I keep it locked onto my basket with the U hanging down and the cable wound around the basket so it takes up almost no space when not in use. The cable neatly winds through my front tire to fully protect my bike. I could not be happier with this purchase!
The Kryptonite KryptoLok with FlexFrame U Bracket is a sturdy U-lock for bicycles or motorcycles. U-Locks are great anti-theft and protective locks. It is the largest and heaviest U-lock I have used on my bikes and feels quite sturdy and not at all clunky to lock. It also has a keyhole cover. I would highly recommend factoring in the dimensions, especially if you are going to use the FlexFrame U Bracket. My bike does not have a traditional smooth and rounded frame which made attaching the bracket somewhat difficult, or just made it less useful as it felt loose. Because of the size of U-lock I was steered towards putting the bracket and u-lock in a less than ideal place, but it worked out, nonetheless. As for the bracket assembly, it comes preassembled and requires ... MoreThe Kryptonite KryptoLok with FlexFrame U Bracket is a sturdy U-lock for bicycles or motorcycles. U-Locks are great anti-theft and protective locks. It is the largest and heaviest U-lock I have used on my bikes and feels quite sturdy and not at all clunky to lock. It also has a keyhole cover. I would highly recommend factoring in the dimensions, especially if you are going to use the FlexFrame U Bracket. My bike does not have a traditional smooth and rounded frame which made attaching the bracket somewhat difficult, or just made it less useful as it felt loose. Because of the size of U-lock I was steered towards putting the bracket and u-lock in a less than ideal place, but it worked out, nonetheless. As for the bracket assembly, it comes preassembled and requires you to thread the nylon belt component around your desired bike bar, pull it tight, and then put the plastic top onto it which you then tighten with a hex key. My only complaint is the bracket is entirely plastic and even has a plastic release button (clunky) to remove the U-lock from the bracket. I wonder how long it will last from wear-and-tear or very cold weather. Apart from that, I think the KryptoLoc will serve its purpose and help protect my bike as intended. It also comes with a lifetime warranty.
This is definitely a heavy duty bike lock! Unfortunately the instructions are hard for me to understand on how to use the nylon strap with shim, that is the only reason I am giving this a 4 star review. The u bracket is large enough to use by itself to go around the bike and a pole, and easy enough for my son to use. We have had combo locks that can easily be cut, but this one uses a key and the metal is very thick and sturdy, so there's no way to cut through it. Overall I'm very happy with this, but if I could figure out the strap, I may be even more happy with it!
The U-lock is amazing. It’s really secure and different than any other lock you would use. It’s heavy and keeps my bikes safe especially whenever my son needs to use it to prevent someone from taking his bike. The long neck of the lock can wrap around creating a secure lock. It comes with 2 keys and no one can get it open. It’s the greatest lock I have seen by far. I recommend anyone looking for a strong reliable safe lock this is the way to go.
The bicycle is awesome and rides smoothly. Upon assembly, however, I had to make some minor adjustments. The chain, for example, was too tight, so I had to loosen the chain tensioner a bit. I also switched the stem to angle upward for my height. Besides those minor changes, it runs smoothly and comfortably. I’m 6’2, but I bought the medium height for easy adjusting. People have commented about the color scheme saying how much they love it. The weight is pretty light also. I would definitely recommend this to anyone who’s looking to casually and comfortably ride without compensating for speed too much. :)
Easy to use and easy to keep with the bike. This is a strong lock that secured my bike wherever I go.It comes complete with a nice bracket that makes it easy to carry the lock with the bike at all times.So many times a had a lock , but left it behind because I forgot to take it. Bracket straps on to the bike with many variations or orientations to match your style and model. It comes with two keys , so I keep one on my keychain , and the other in a safe place at home. It was very easy to lock and unlock. No lock is 100% , but this one is substantial enough to deter most thieves. I feel it more than serves its purpose to secure my bike. I recommend it for quality , value , and functionality.
I'm a big fan of this brand. There are different sizes, which is wonderful. They normally come with three keys instead of two, which I absolutely love and so does my family. It's not heavy, the size is perfect and overall I like this lock. Perfect for me to be able to ride my bike and be calm when I want to do something different. I recommend it!!!
| Lock type | Key Lock |
| Item dimensions L x W x H | 8 x 3 x 3 centimetres |
| Finish Types | Vinyl |
| Item Dimensions | 8 x 3 x 3 centimetres |
| Recommended Uses For Product | Cycling |
