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INTEKIN

Bike Chain Lock 3FT/4FT/5FT Heavy Duty Bike Lock Anti-Theft Bicycle Chain Lock 8mm/10mm Thicker Bicycle Lock Chain Bike Lock with 3 Keys for Bike, Motorcycle

  • Based on 938 reviews
Condition: New
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Availability: 20 left in stock
Fulfilled by Amazon
Arrives Tuesday, Aug 11
Order within 6 hours and 12 minutes
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Color: Black(4FT-8mm)


Features

  • HIGH QUALITY HEAVY DUTY BIKE LOCK: The bike chain lock itself features 8mm/0.32inch square links which are made of high carbon structural steel link which is heat treatment hardening, thus the links will not be too brittle. The thick links have high tenacity for strong cut resistance, and will provide your valuable things with extra protection against bolt cutters.
  • HEAVY-DUTY DEADBOLT & BLADE LOCK CORE: Unlike standard bike locks with spring latches, this lock features a solid metal deadbolt that physically blocks cutting and prying. Inside, it uses a blade lock cylinder (not easy-to-pick pin tumblers) with precision-coded blades that only your unique key can align. Its the same tech used in high-security door locksnow protecting your bike from both angle grinders and lock picks. With the lock dust cover and cooper lock cylinder, no need to worry about blocking
  • HUMANISED DESIGN: This bike chain lock comes with 3 keys, so you'll always have a spare one. It will offer you some peace of mind in case you lose one. The bicycle chain lock comes with a flexible protective cloth sleeve which can protect the bike from scratch.
  • WIDE APPLICATION: This bicycle lock has a wide application which is ideal for bicycle, motorcycle, gates, fences and more. Just use it to freely protect your valuable objects as long as the length of this bike chain lock is suitable for the objects you protected.
  • PORTABLE SIZE: The total length of this chain bike lock is 4FT and the weight of which is 3.93lbs. You can just wrap the heavy duty bike lock on your bike frame or just put it into your backpack to enjoy your beautiful day like never before!

Description

8MM/0.32INCH HGIHG CARBON STRUCTURAL STEEL BIKE CHAIN LOCK BRINGS YOU MORE SAFETY The bicycle lock is made of high quality manganese steel which is heat treatment of high tenacity for strong cut resistance. The flexible protective cloth sleeve of this bike lock will keep your bike from scratching. The whole design of the chain bike lock can prevent it from picking, knocking and bumping. Thick Security Links! The bike chain lock itself features 8mm/0.32inch square links which are made of high carbon structural steel link which is heat treatment hardening, thus the links will not be too brittle. The thick links have high tenacity for strong cut resistance, and will provide your valuable things with extra protection against bolt cutters. 3 Keys for You! This heavy duty bike lock comes with 3 copper keys, so you'll always have a spare one. It will offer you some peace of mind in case you lose one. These 3 keys are specially designed which are difficult to copy and the good quality makes it very smooth to open the bicycle lock, you will never worry about blocking. Bring more safety for you! The lock cylinder of this bike lock chain is made by zinc alloy blade, it will make any thief think twice before trying to steal your bicycle, thus bring more safety to your bikes. Comes with a lock hole dust cover, the bicyle chain lock can resist corrosion from water, dust and dirt. The life of your bicycle u lock will be prolonged.

Brand: INTEKIN


Special Feature: heavy duty bike lock


Lock Type: Key Lock


Item dimensions L x W x H: 7.5 x 6 x 1.8 inches


Material: Alloy Steel, Zinc


Brand Name: INTEKIN


Recommended Uses For Product: Securing bicycles


Number of Pieces: 1


Included Components: bike lock


Model Number: 328-0812-black


Model Name: 328-0812-black


Manufacturer: INTEKIN


Unit Count: 1.0 Count


Manufacturer Part Number: 328


Item Type Name: bike lock


Additional Features: heavy duty bike lock


Lock Type: Key Lock


Controller Type: Hand Control


Control Method: App


Style Name: heavy duty bike lock


Color: Black(4FT-8mm)


Shape: Square, U Shape


Material Type: Alloy Steel, Zinc


Item Dimensions: 7.5 x 6 x 1.8 inches


Item Weight: 3.93 Pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Aug 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Heavy duty and feels secure
Color: Black(3FT-8mm)
Really liked this lock. It feels sturdy, heavy duty, and much more secure than some of the cheaper bike locks I’ve tried before. The chain has a nice protective cover so it does not scratch things up, and the lock mechanism worked smoothly. I actually bought this after a bike in our neighborhood got stolen and wanted something that felt more solid for peace of mind. It has been easy to use and definitely feels like a good added layer of security when leaving a bike outside for a while. Very happy with this purchase ... show more
Reviewed in the United States on May 19, 2026 by Malinda peschong
    • Good quality
Color: Black(5FT-8mm)
Got this for my electric trike works great . It gives me peace of mind that my trike is safe
Reviewed in the United States on March 31, 2026 by cathy Gates
    • Great lock
Color: Black(3FT-8mm)
Solid, easy to use and strong.
Reviewed in the United States on September 26, 2025 by Eduardo Figueroa
    • Seems pretty heavy duty overall.
Color: Black(4FT-8mm)
Seems pretty heavy duty overall. Purchased the 4' and happy with it so far. Quality seems decent. Delivered on time. Would recommend
Reviewed in the United States on August 14, 2025 by Bob hagar
    • Secure, but bulky and heavy
Color: Black(3FT-8mm)
I got this lock after having two consecutive combination locks cut from my bicycle. I neglected to write down the combinations I'd set, and after a long winter, I couldn't remember them! So, I decided to go with a key lock. This is a SOLID lock and chain, but it is heavy and bulky. So, I often have to take a few extra minutes after unlocking it so I can figure out how to wrap it around my seat peg. The block where you insert the key is so large that it will droop down and get in the way of my legs or hang down and bang against the frame if I don't wrap it tightly enough. The chain itself is so bulky that it makes wrapping it a challenge. I don't have any storage on my bike (and don't wear a backpack), so this is the only place I can store it. But for the price, it's a great lock. ... show more
Reviewed in the United States on March 29, 2025 by Bruce B.
    • Def
Color: Black(3FT-8mm)
This bike lock feels very sturdy and secure. Easy to use, solid build, and gives me peace of mind when leaving my bike outside. Great quality for the price—definitely recommend 🚲🔒
Reviewed in the United States on March 31, 2026 by Florencia Guevara
    • Can we do six stars for Sturdiness?
Color: Black(3FT-8mm)
It looks exactly as advertised, and comes with two keys. the key hole has an environmental slide so you don't get rain in the lock, and the chain is nicely covered in a bike-paint protecting layer of... well, something. It's a thick chain - this is not the kind of bike chain you can cut with industrial shears. Well, maybe you could - but anyone trying to steal your bike with industrial shears probably needs it more than you. Look - This is the best bike lock and chain set I've ever bought, and I've gone through my share of bikes. I bought two, one for each kid, and it made them feel secure. If your bike gets stolen with this lock in place, you either didn't lock it properly (remember, always through the FRAME, not just the front tire), someone cut the thing you locked the bike to, or someone owns the aforementioned industrial shears. TLDR: Great price, Great lock, Would buy again, but I don't see this one needing replacement any time soon. ... show more
Reviewed in the United States on August 7, 2023 by Ryan K.
    • Third time's the charm? I feel dared. Third time's the charm? I feel dared.
Color: Black(3FT-8mm)
Review Image by Yaz Pogue
Decent security but not total security. I've withstood at least two attempts to break this lock. First some kind of cutters to the lock's box, second a torch to the lock hole itself. I don't know what results the pyro was trying to achieve. Also, the key continues to work after the pyro's visit mangled as the plastic and cover are ... You can definitely get a lock more secure than this but this one has an excellent price to protection ratio. Pro Tip: Two different types of locks and two different securing points makes a harder target. ... show more
Reviewed in the United States on April 25, 2025 Reviewed in the United States on April 25, 2025 by Yaz Pogue

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