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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 820 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Aug 15 – Aug 16
Order within 12 hours and 30 minutes
Available payment plans shown during checkout

Color: Black(3FT-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.
  • NO BLOCKING: The lock cylinder of this bike chain lock is made by zinc alloy blade, which has a precise structure to prevent technical opening. With the lock dust cover and cooper lock cylinder, no need to worry about blocking when opening the heavy duty bike lock.
  • 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 3FT and the weight of which is 2.87lbs. 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: ‎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


Recommended Uses For Product: ‎bike security, gate security, fence security, door security, motorcycle security, e-bike security


Style: ‎heavy duty bike lock


Color: ‎Black(3FT-8mm)


Number of Pieces: ‎1


Included Components: ‎bike lock


Controller Type: ‎Hand Control


Shape: ‎U Shape, Square


Item Weight: ‎3.05 Pounds


Control Method: ‎App


Model Name: ‎328


Manufacturer: ‎INTEKIN


Item Package Dimensions L x W x H: ‎9.21 x 6.22 x 1.73 inches


Package Weight: ‎1.44 Kilograms


Item Dimensions LxWxH: ‎7.5 x 6 x 1.8 inches


Brand Name: ‎INTEKIN


Part Number: ‎328


Date First Available: December 22, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 15 – Aug 16

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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Top Amazon Reviews


  • Excelente producto
Color: Black(3FT-8mm)
Súper bueno lo recomiendo
Reviewed in the United States on July 26, 2025 by Surely

  • Work great
Works perfectly and is heavy
Reviewed in the United States on July 20, 2025 by Andrew

  • A
Color: Black(3FT-8mm)
Why did you pick this product vs others?: Hard to break so no one steal my scooter
Reviewed in the United States on July 8, 2025 by Alex N

  • Pretty good so far!
Color: Black(3FT-8mm)
We live in an area that has an enormous tent city/homeless population that every crosswalk and light corner will have a "say no to panhandlers". The regular population is fine usually. But as my friends and I collectively call it the "twin peaks" or the "nightvale" of my state. So I didn't want to pay a hundred dollars for a bike lock that would protect my e-bike in a place where bikes are the number one stolen thing. Like all day every day, bikes stolen and ditched all over the area. So I really just didn't want a lock that was gonna be easy to cut through or drill out. The online review by "lock picking lawyer" suggested a style of chain that would be safe in city and suburban areas with high risk of bike theft. His recommended brand was just out of my budget. So I tried this one that a friend suggested that's more affordable and still the same function and longevity as well as dependability without the high cost. Much more affordable, fits my little ebike and locks and unlocks easily with the (3 sets) of key. Which is convenient because I'm often forgetting my keys and need a back up. Pretty damn good for twenty something bucks! ... show more
Reviewed in the United States on July 21, 2023 by Adam Ivester-Fox

  • 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.

  • GREAT LOCK.
Color: Black(3FT-8mm)
BUY IT!!!! Its gonna be better then you think. SOLID !! Nobody is gonna touch this. .Very Happy with purchase.
Reviewed in the United States on June 10, 2025 by Mike D.

  • Third time's the charm? I feel dared.
Color: Black(3FT-8mm)
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 by Yaz Pogue Yaz Pogue

  • Excellent lock choice
Color: Black(5FT-8mm)
Exactly as described. Love the lock and it’s very sturdy
Reviewed in the United States on May 23, 2025 by Tracy Goralczyk

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