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Kryptonite

Kryptonite Keeper Folding Bike Lock, 2.75FT/3.25 FT Long Compact Lightweight High Security Anti-Theft Foldable Bicycle Lock with 2 Keys and Mount for E-Bikes Scooter Road Mountain Bike

  • Based on 591 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Wednesday, Jun 24
Order within 2 hours and 23 minutes
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Style: 39 Inches


Features

  • HIGH-SECURITY DESIGN: This Anti-Theft folding bike lock is made from 3mm hardened steel bars for greater cut resistance. Durable rubber coating helps prevent scratching and wear and tear on your bike
  • 100CM USABLE LOCKING LENGTH: Provides extended length for securing bikes, scooters, or accessories to a wide range of fixed objects
  • LIGHTWEIGHT & PORTABLE: Weighing just 1.90 lbs, this folding lock is compact enough to fit in a backpack or mount on your bike frame, making it easy for riders on thr go
  • CONVENIENT TRANSPORT BRACKET: Includes easy-to-install bracket, allowing for simple attachment to your bike for hassle free transportation
  • DURABLE & COMPACT SECURITY: Ideal for short-term stops or securing your bike in low to medium risk theft areas. This security lock comes with two keys and mounting bracket for transport
  • ATPO & KEY SAFE PROGRAM ELIGIBLE: Register to qualify for Kryptonite's Anti-Theft Protection Offer and Key Safe key replacement service

Brand: Kryptonite


Special Feature: Portable


Lock Type: Key Lock


Item dimensions L x W x H: 25 x 5 x 5 inches


Material: Alloy Steel


Brand Name: Kryptonite


Recommended Uses For Product: Securing bicycles in urban, suburban, and rural areas


Number of Pieces: 1


Included Components: Lock^Bracket^Strap^Key(2)


Model Number:


UPC: 720018004127


Model Name: Keeper 510 Folding Lock


Global Trade Identification Number: 27


Manufacturer Warranty Description: Replace if was broken from factory


Manufacturer: Kryptonite


Unit Count: 1.0 Count


Manufacturer Part Number: 4127


Item Type Name: KRYPTONITE KEEPER 510 FOLDABLE LOCK


Additional Features: Portable


Lock Type: Key Lock


Controller Type: Hand Control


Control Method: Touch


Smart Home Compatibility: Not Smart Home Compatible


Style Name: 39 Inches


Color: Black


Shape: U Shape


Material Type: Alloy Steel


Finish Types: Painted


Item Dimensions: 25 x 5 x 5 inches


Item Weight: 1.9 Pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jun 24

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.

Similar Products

Top Amazon Reviews

    • Works really great
Style: 39 Inches
Best lock I have ever used, e-bike 2 locks works great
Reviewed in the United States on June 19, 2025 by Ruby Lutz
    • Compact and simple to use
Style: 39 Inches
I had to graduate from a simple cable lock for my beat-up hybrid bikes to something a little more secure for a modern Class 3 E-bike. This folding lock is moderately secure, enough for shorts stops and more where I ride. The length is sufficient to lock a bike frame around a good size post or other sturdy object, and simple to operate. While it's not light, it's not ridiculously heavy. Most importantly, it easily fits into the side pocket of a small rear rack bag. The lock itself is coated with a soft material so it won't scar your bike during use. Not as secure as a U-lock, but more versatile. And not as heavy or as bulky as a similar size chain lock. Seem like a good compromise between security and weight for those riding in a rural or suburban environment or for short stops for lunch or shopping. ... show more
Reviewed in the United States on July 10, 2024 by Roger Rowlett
    • Good little lock!
Style: 39 Inches
Good solid little lock that fits nicely on a bike. The way it is designed it easy to use for relative safety anywhere around town. I would not recommend this for use in a really threatening, high crime neighborhood. I feel that this would not provide the "ultimate" protection you are looking for, but for the rest of us going to school and work that want to park our bike for a couple of hours around a pole and simply don't want a teenage boy walking away with our bike. This is great and easy to use. Also if you have multiple locks, the keys are numbered so you can keep them straight from one another... ... show more
Reviewed in the United States on February 13, 2026 by Stephen Walker
    • Sturdy and easy to carry and use.
Style: 39 Inches
I am rating the lock not Amazon's delivery, so I'll give it 5 stars. The lock is sturdy and easy to mount and use. No, it wouldn't stand up to a grinder, but I never leave the bike out of public sight or for very long. It's not too heavy and fits my folder perfectly. Next day delivery took over a week and a customer service call but other than that it was great. ... show more
Reviewed in the United States on July 2, 2025 by Michael Lueck
    • Excellent
Style: 39 Inches
Great lock for the price. It isn't maximum security but in my relatively low crime are it does the job. Attaches right to the frame and works great
Reviewed in the United States on November 16, 2024 by Michael DeMaio
    • Locks great
Style: 39 Inches
The lock is great but won’t stay mounted it is always falling or sliding around probably going to be home when I need it
Reviewed in the United States on September 6, 2024 by Jeff Mcanelly
    • Great usability
Style: 39 Inches
The flexible hinges allow you to wrap this around, oddly shaped objects. It folds up nicely and stows on the bike easily. I lock and unlock my bike multiple times per day and this particular bike makes that task much simpler and quicker.
Reviewed in the United States on September 11, 2024 by Amazon Customer
    • Protect your bike
Style: 39 Inches
Strong Lock quality: Ok
Reviewed in the United States on July 4, 2025 by Rick

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