Search  for anything...

NDakter Bike Locks Heavy Duty Anti Theft 18mm Thick, Motorcycle U Lock with 4FT x 6mm Security Chain, 3Keys Large U-Shape Electric Bicycle Wheel Lock for Ebike, Escooter, Fat-Tire Dirt-Bike, Tricycle

  • Based on 424 reviews
Condition: New
Checking for the best price...
$32.99 Why this price?
Save $29.99 was $62.98

Buy Now, Pay Later


As low as $8 / mo
  • – 4-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: 15 left in stock
Fulfilled by Amazon

Arrives Friday, May 29
Order within 11 hours and 15 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Size: 7 x 5.5in Lock with 4ft x 6mm Chain


Features

  • Heavy Duty Anti Theft NDakter's bike locks heavy duty anti theft, this bike u lock set is composed of an ergonomic bike u lock for scooter with double-open design and a 6mm x 120cm motorcycle chain. anti theft motorcycle wheel lock adopts 0.7 inch /18 mm hardened steel shackle, with external dimensions of 7.8in x 9.2in, internal dimensions is 5.5in x 7in, the weight of this ebike heavy duty anti theft u lock is 1.6KG, which makes it more secure against theft. The anti theft moped chain is made of high-quality 3T manganese steel chain, stronger than ordinary steel cable. This electric bike lock can effectively resist cutting and lever attacks, sfety of your motorcycle, ebike,moped and more
  • Ergonomic Design & 3 KeysMotorcycle u lock's cylinder is made of high-quality zinc alloy, and the large u shape is ergonomic, with structural precision, which can effectively prevent technical opening. This bike locks heavy duty anti theft come with 3 keys, so you don't need to memorize the code or worry about losing the keys. They are made of brass, very strong, and not easy to bend or deform
  • Weatherproof & Wear ResistantEbike locks heavy duty anti theft chain is wrapped in a durable nylon protector, moped lock outer protector is silicone, weatherproof and suitable for outdoor use, which can effectively prevent your electric bicycle or other property from being scratched by the heavy duty anti theft big u lock and strong motorcycle chain
  • Multi-purpose: The motorcycle locks anti theft chain is 120cm long, which is enough to lock 3 to 4 tricycles together, you can also lock motorcycle together with a thick bar, and you can use a electric bike locks in low-risk areas. The heavy duty bike chain has two different sized steel rings, the smaller ring can be threaded through the larger ring and has more locking options. It's perfect for locking electric-motorcycle, motorbikes, e-bikes, electric-scooter, moped, tricycle, bicycle, lawnmowers, gates, fences, ladders, grills, sports equipment and toolboxes. This is the perfect gift for family, friends and students.(NOTICE: THE TOTAL LENGTH INCLUDES DOUBLE LOOP ENDS!)
  • Packaging & Help1 x ebike u lock (0.7in/18mm shackle) ;1 x black chain(6mm x 120cm); 3 x keys. The total product weight is:4.4 lbs.If you have any questions about the product, please inform NDakter at any time for after-sales service, NDakter will follow up closely

Brand: NDakter


Special Feature: Anti-Drill


Lock Type: Key Lock


Item dimensions L x W x H: 7.09 x 3.15 x 1.18 inches


Material: Brass


Brand Name: NDakter


Recommended Uses For Product: for Bike, Ebike, Escooter, Moped and Gate


Included Components: u lock with chain & 3 keys


Model Number: Bügelschlösser


Manufacturer: NDakter


Item Type Name: u lock


Item Dimensions: 7.09 x 3.15 x 1.18 inches


Additional Features: Anti-Drill


Lock Type: Key Lock


Controller Type: Touch


Control Method: Touch


Style Name: Modern


Color: Black


Shape: U-Shape


Material Type: Brass


Finish Types: Painted


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, May 29

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great security lock
Size: 7 x 5.5in Lock with 4ft x 6mm Chain
This lock is secure and easy to use. I use it to secure my mobility scooter. It has weight to it, giving it the stability it needs to keep my scooter in place. Fits perfectly around the wheel spokes and is very durable.
Reviewed in the United States on August 5, 2025 by Nancy gallo

  • Great for fat tire bikes
Size: 7 x 5.5in Lock with 4ft x 6mm Chain
Very sturdy and secure, no complaints. I love that it comes with 3 keys and the fact that it's big enough for my fat tire e bike. The chain is a plus too.
Reviewed in the United States on October 22, 2025 by Ronald Brown

  • Ain’t goin nowhere
Size: 7 x 5.5in Lock with 4ft x 6mm Chain
My son got this for his bike and says it woks perfect! Durable and perfect for the protection of his bike
Reviewed in the United States on September 22, 2025 by Leslie

  • Works great
Size: 7 x 5.5in Lock with 4ft x 6mm Chain
Easy to use and very sturdy
Reviewed in the United States on February 14, 2026 by Stephany Raine Holden

  • Very durable/heavy
Size: 7 x 5.5in Lock with 4ft x 6mm Chain
Seems to be of good quality and easy to use. The chain and the thickness of the protection around the chain seem durable.
Reviewed in the United States on April 10, 2026 by Jon J.

  • Just what I was looking for
Size: 7 x 5.5in Lock with 4ft x 6mm Chain
Used for securement of motorcycle. Even though have other security features on the bike, purchased this as an extra measure - thick steel or alloy. Easy to use. Comes with a chain as well. Gives that little bit more of sense of security
Reviewed in the United States on February 5, 2026 by derek wickstrom

  • Great for e-bikes
Size: 7 x 5.5in Lock with 4ft x 6mm Chain
All I can say is this is an outstanding bicycle lock for our e-bikes.
Reviewed in the United States on November 15, 2025 by A. Matthew Hall

  • Nice Best of Both Worlds Lock Combo
Size: 7 x 5.5in Lock with 4ft x 6mm Chain
I ordered this because it gives you both the convenience of a covered (non-scratch) chain as well as a heavy U-Lock. I use the chain to secure the front wheel and the U-Lock securing the ends of the chain and also securing the frame and rear wheel to a bike rack or other anchor point.
Reviewed in the United States on April 11, 2026 by 127.0.0.1

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...