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Why choose our big bike u locks heavy-duty anti-theft?
- As we all know, thousands of bicycles are stolen every year in the United States. The only thing better than buying a new bike is to keep it. This is why our U-lock bicycle lock combination for motorcycles, electric bicycles, scooters and folding bicycles was born in our company.
- Choose our KASTWILL U-shaped bicycle lock in any weather conditions, no matter where you go, you can get seamless security and extra protection. Our KASTEWILL 2-in-1 lock system with 16 mm shackle, 4-foot-long safety cable U-lock – tamper-proof, pull-and-drilled double-bolt locking mechanism and debris cover, combined with 4 feet 48 inches (1200 Mm) braided steel cable, combining convenience and performance. Includes a convenient mounting bracket and 2 dedicated security keys.
Steel Cable Size
Length: 120cm/4feet
Diameter: 12.2mm/0.48inch(including PVC cover)
With this extra bike cable lock, it allows you to lock not only the frame, but also both wheels. It will provide your bike with greater locking flexibility and better protection.
U Lock Size
Dimensions of U lock: 11.4 inches * 6.3 inches
KASTEWILL U lock is made of 12mm hardened performance zinc alloy shackle and covered by a 3.85mm PVC coating.
Locks up your bike in seconds, and offers super lightweight handling.
This bike U lock is sturdy without being too heavy! Comes with a high quality mounting bracket which is suitable for all circular tripod in diameter ≤30mm.
Advantages of our bicycle u-lock
1.Bring you more security and you can enjoy more rides with your family or friends.
2.The bike lock is made of alloy steel which is of high tenacity for strong cut resistance.
3.The steel cable is covered by PVC material coating to keep your bicycle lock from scratching or rusting. Besides, this bike u lock can resist 12 tons of hydraulic shear which will bring you more security and flexibility to lock your bike.
4.The imported C-grade pure copper lock cylinder is waterproof and not easy to rust and with two rust-proof copper keys.
Additional Features: Lock debris cover keeps dust and dirt out of your lock. PVC protective coating material protects your bike from getting scratched. Resists corrosion from water, dust and dirt to prolong the life of your lock.
Lock Maintenance: For best operation, be sure to clean and lubricate the cylinder and the locking mechanism regularly with a light spray, such as WD-40 HIGH PERFORMANCE PENETRANT.
16mm of fortified ABS steel in a U-lock shackle resists pulling, jacking, and prying, giving you complete anti-theft protection.
That means you can lock your bike up with peace of mind that thieves won’t even attempt to steal it.
Combined with its favored U-lock design and woven steel cable, this bike lock delivers the highest level of protection possible.
u lock for bike
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Wally White
Reviewed in the United States on February 14, 2025
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David Sin
Reviewed in Canada on May 17, 2024
I like it, works well.
Nelson Schnepf
Reviewed in the United States on September 11, 2023
The "button" is touch sensitive, so it's super easy to find in the dark. I'm actually using these as night-stand lights since their glow is so gentle on the eyes but can also be strong enough to read by on the highest of the three settings. Internal, rechargeable battery works great too!
Super
Reviewed in Canada on August 2, 2023
Vintage PowerReader
Reviewed in the United States on May 28, 2023
I needed a fast, easy to use large lock for my e bike. took a chance on this. I am using it for run in for milk, coffee not for leaving the bike alone in a city.using on a van bike trip--- really easy to use. toss in the basket.i have an older exxpensive lock that is a lot harder to get on and off.
Professor Bubba
Reviewed in the United States on September 27, 2022
I was not willing to buy a $100 kryptonite lock for my 70 dollar bicycle. And I was not impressed with an ultra cheap 14 dollar cable lock I had bought (it has a pretty color, a plastic shaft and a thin steel cable that would probably take 5 seconds to cut, no better than nothing.). So I bought the large version of this kastewell u lock and 6 ft cable.I think that the lock is awesome. The U-lock easily fits around most poles and the cable is a good deterrent. THE PROBLEM is that the metal keys are extremely weak, as if they are made with soft lead. They easily bend and break. It comes with two keys, and one of them broke, while the other one is bent, and I don't know how long it will last. So, great product, but the keys are awful.
Jacob LaCroix
Reviewed in the United States on July 5, 2022
I'm using this lock through the front wheel of a motorcycle. The u-lock itself is very thick and feels like it would be hard to cut or get through; the cable is also quite robust but I'm not actually using it right now. The plastic holder it comes with seems to be working out as well, I like the idea at least of being able to store the lock right on the bike and not have it bang around, and I'm sure if I had the appropriate bike frame sizes tube to attach it too as intended it would feel more sturdy than it does at the moment. Definitely a good buy for the price though,I think I got the small option for like $17 and it's added great piece of mind when I have to leave the bike parked.
Colala
Reviewed in Canada on June 13, 2022
I still have my bike, so it works!
Kevin Smith
Reviewed in Canada on June 10, 2022
I like that the lock is small and tough. I see that for some bikes it may not fit, but your bike would have to be pretty big for it to not work.
Diggy
Reviewed in Canada on November 23, 2022
Lock works fine, pretty short, maybe too short, makes locking frequently a hassle. Another inch would make a huge difference. SIlicon finish creates friction when trying to put lock in holder, which I rarely use.
Daniel Rainville
Reviewed in the United States on April 3, 2022
When I first received this package and I felt how heavy this Item was, I wasn't really sure what it was But when I opened the box to see this lock I was Impressed on how Heavy Duty this lock was. It will definitely slow someone down trying to steal your bike, if they even want to bother to try after checking it out. I'd highly recommend this lock! Now when you store the cable I found a way to connect the bracket to the up riser where your seat post sets in. The bracket was to small to fit around the riser on my bike but I had enough room to put it around the riser without breaking it and then I put zip ties through the screw holes along with one under the bracket to support bracket to the riser itself. This helps for when you go to pull the locking post from the bracket It won't slide down.The way I tie the cable is by just wrapping the cable to the cross member about 4 times around and then I put the U-Lock through the eyelets on the cable and this holds the cable on pretty good. I have the U-Lock set up so the bracket is facing the front of the bike, so when you put the U-Lock in the locking post this to is facing the front of the bike. I have not had any problems with the U-Lock and cable interfering with my peddling.I hope this kinda helps people out on how to mount the bracket and attach the cable and lock together.
Moe
Reviewed in the United States on July 20, 2021
This is a heavy duty lock. It can be used to secure other stuff and not only Bicycles. The lock is very sturdy and seems to be well constructed.I loved that it’s coated with a matte PVC cover which makes it fancier and resistant to scratches.The steel cable is strong and long enough and made of actual steel.They provide you with 2 keys, which is great since I loose keys all the time.The lock/key set seem like a normal set and mechanism, nothing to complain about here.In conclusion, I think it is a good investment to have the peace of your mind of knowing the bike won’t be stolen when you return.
NMB
Reviewed in the United States on June 7, 2021
tldr; The product works decently well given cost.You aren't looking at this bike lock if you are looking for the absolute best product that works the best for the given application. However, you are most likely looking for a U-Lock and were enticed by the cost of this product. So, I will spare the positives since it passes basic functionality and if you can live with the negatives then it is potentially a candidate for purchase. The coating of the U portion of the lock is rubbery and therefore could potentially lead to your skin catching on the lock if you are more person or do not ride with the most pristine form (or simply just position the lock poorly). The bar itself is obviously more sturdy than a chain lock, however if someone is determined to take your bike (given large enough lever, and not that large) its still very doable through the lock. The fitting of the attachment to mount the lock on the bike is a plastic and has a small range of diameters that it can actually work with – so check your bike for applicable locations before purchase. Further, the lock is held on with screws and nuts clamping the plastic through (ironically and hopefully) elastic deformation around the shaft and a rubber piece to add grip since it will deform easily allowing for a tighter connection. However, the entirety of this is held together by the two screws and nuts (as mentioned) and I see this as a critical point of failure given enough jostling or time wear to the point it breaks. Finally, the actual U part of the lock will not fit around a lot a poles due to the inner diameter being small (believe it is mentioned in product description, just noteworthy in purchase consideration since it may not fit your application). In all, thus far I would say the product is satisfactory and meets the basic needs of a U-Lock.
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