---
product_id: 59653399
title: "Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock Bike Lock with Transit FlexFrame Bracket (4-Inch x 11.5-Inch)"
brand: "kryptonite"
price: "25670 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Kryptonite"
url: https://www.desertcart.is/products/59653399-kryptonite-evolution-series-4-ls-heavy-duty-bicycle-u-lock
store_origin: IS
region: Iceland
---

# 14mm hardened MAX-Performance steel shackle 3 stainless steel keys + LED replaceable key fob Patent-pending double deadbolt design Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock Bike Lock with Transit FlexFrame Bracket (4-Inch x 11.5-Inch)

**Brand:** kryptonite
**Price:** 25670 kr
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in your ride’s safety with Kryptonite Evolution – because your bike deserves elite protection!

## Quick Answers

- **What is this?** Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock Bike Lock with Transit FlexFrame Bracket (4-Inch x 11.5-Inch) by kryptonite
- **How much does it cost?** 25670 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/59653399-kryptonite-evolution-series-4-ls-heavy-duty-bicycle-u-lock)

## Best For

- kryptonite enthusiasts

## Why This Product

- Trusted kryptonite brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** New smaller crossbar design fits more bike frames without compromising security
- • **Next-Level Locking:** Patent-pending double deadbolt design delivers superior protection against prying and twisting
- • **Smart Key Security:** Includes 3 stainless steel keys with innovative LED replaceable key fob for easy nighttime access
- • **Pick & Drill Resistant:** High-security disc-style cylinder engineered to thwart lock-picking and drilling attempts
- • **Unmatched Steel Strength:** 14mm MAX-Performance hardened steel shackle resists cutting and twisting attacks

## Overview

The Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock features a robust 14mm hardened MAX-Performance steel shackle and a patent-pending double deadbolt design for superior anti-theft protection. It comes with 3 stainless steel keys, including a new LED replaceable key fob for convenience in low light. Its compact crossbar design enhances frame compatibility, while the high-security disc-style cylinder resists picking and drilling. Ideal for professionals who demand reliable, long-lasting security for their bikes.

## Description

Shop Kryptonite Evolution Long Shackle Bike U-Lock, Anti-Theft Security, 14mm Steel Shackle with Mounting Bracket and Keys, High Security for Bicycles Scooters,Black. Free delivery and returns on all eligible orders.

Review: A great deterrent - Solid and easy to use. Perfect for my electric. I couldn’t use the frame mount bracket because I couldn’t find anywhere suitable to mount it on my particular frame but it fits in my saddlebag so wasn’t worried.
Review: The last one lasted 20 years. And this one is thicker. - Some of the reviews mention problems with the cylinder or the keys. They are previous to the 2017 " New-U" design. I think it is not fair to keep them here. I purchased a Kryptonite MegaLok back in May 1998. Twenty years after, in May 2018, the cylinder failed. I have been consistently parking my bicycle outdoors for the last five years, with plenty of rain in the previous months. We had to use an electric grinder (this reminds us that ANY lock, even the "9-10" rated, can be cut in seconds with a power tool). During these twenty years, I lost the keys three times. Every time I got a free replacement in my mailbox, overseas. That's why Kryptonite was my first option when I looked for a replacement. Since this model is not directly available in Spain, where I currently live, I had to buy an expensive Angus chain from a local German store as a temporary solution -but it was too heavy to carry it. The model I got is the longest, the LS, which is about the same length as the previous one I owned.- a few mm longer and wider. In my experience, a smaller lock is not very useful in a city with not too many parking racks. The keys are now stainless steel, and the lock has now a plastic sliding cover to protect it from the water. One of the first things I noticed is that the metal is now thicker than the one I bought in 1998. This is the opposite I expected. Also, the mounting bracket looks much better than the older one (that one lasted a few years). My bicycle frame (yes, I own the same bicycle I purchased along with the lock back in 1998!) is rather small, so I think the reviews that mention space problems to mount the bracket are misleading. The instructions give plenty of details on how to adjust the bracket, although the picture showing the recommended locations might be confusing. The lock does not have to be inside the frame, you only have to care about finding a position that does not impede your pedalling. The problem is that these instructions require the people buying this lock to be literate! :) (See attached picture) IMHO Kryptonite is one of those rare remaining American companies - like Oster and a few others- that still care about quality and customer service. And I want to add that I'm not being paid by Kryptonite to review this lock. ------ EDITION AFTER 3 YEARS OF DAILY USE: Now I notice the mounting bracket is about the same as 20 years ago. I had to tighten it too often, and I do not use it anymore. Instead, I carry the U lock hanging from the handlebar, facing down to lower the centre of gravity. I see Kryptonite has some room for improvement on this bracket. As for the lock itself, it is working like a charm. However, I recommend using a graphite powder lubricant at the first sign of difficulty opening it.

## Features

- 14mm hardened MAX-Performance steel shackle
- 3 stainless steel keys - including new key design and one LED replaceable key fob
- Patent-pending hardened double deadbolt design gives additional protection against twist attacks
- NEW smaller crossbar design
- Higher security disc-style cylinder is pick and drill resistant

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XCPGFP3 |
| Batteries included? | No |
| Best Sellers Rank | 25,981 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 45 in Cycling U-Locks |
| Brand | Kryptonite |
| Color | Orange |
| Customer Reviews | 4.3 4.3 out of 5 stars (1,175) |
| Date First Available | 1 Mar. 2017 |
| Department | Unisex |
| Features | Key Unlock |
| Height | 2 inches |
| Included components | Locks |
| Is discontinued by manufacturer | No |
| Item display length | 14 inches |
| Item display width | 6.5 inches |
| Item model number | 002147 |
| Manufacturer | Kryptonite |
| Material type | Alloy Steel |
| Number of items | 1 |
| Number of pieces | 1 |
| Product Dimensions | 8 x 3 x 3 cm; 1.75 kg |
| Seasons | Year-round |
| Shape | Curved |
| Size | 10.2 cm x 29.2 cm |
| Sport | Cycling |
| Style | Evolution |
| Weight | 0.5 Kilograms |

## Product Details

- **Brand:** Kryptonite
- **Item dimensions L x W x H:** 8 x 3 x 3 centimetres
- **Lock type:** Deadbolt
- **Material:** Alloy Steel
- **Special feature:** Key Unlock

## Images

![Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock Bike Lock with Transit FlexFrame Bracket (4-Inch x 11.5-Inch) - Image 1](https://m.media-amazon.com/images/I/71CTAL3WU7L.jpg)
![Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock Bike Lock with Transit FlexFrame Bracket (4-Inch x 11.5-Inch) - Image 2](https://m.media-amazon.com/images/I/71JsLC-rBwL.jpg)
![Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock Bike Lock with Transit FlexFrame Bracket (4-Inch x 11.5-Inch) - Image 3](https://m.media-amazon.com/images/I/71pSDLGSwPL.jpg)
![Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock Bike Lock with Transit FlexFrame Bracket (4-Inch x 11.5-Inch) - Image 4](https://m.media-amazon.com/images/I/81uJ4MrZigL.jpg)
![Kryptonite Evolution Series-4 LS Heavy Duty Bicycle U Lock Bike Lock with Transit FlexFrame Bracket (4-Inch x 11.5-Inch) - Image 5](https://m.media-amazon.com/images/I/61IDu+ay-nL.jpg)

## Available Options

This product comes in different **Pattern, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ A great deterrent
*by M***E on 11 October 2025*

Solid and easy to use. Perfect for my electric. I couldn’t use the frame mount bracket because I couldn’t find anywhere suitable to mount it on my particular frame but it fits in my saddlebag so wasn’t worried.

### ⭐⭐⭐⭐⭐ The last one lasted 20 years. And this one is thicker.
*by H***A on 19 May 2018*

Some of the reviews mention problems with the cylinder or the keys. They are previous to the 2017 " New-U" design. I think it is not fair to keep them here. I purchased a Kryptonite MegaLok back in May 1998. Twenty years after, in May 2018, the cylinder failed. I have been consistently parking my bicycle outdoors for the last five years, with plenty of rain in the previous months. We had to use an electric grinder (this reminds us that ANY lock, even the "9-10" rated, can be cut in seconds with a power tool). During these twenty years, I lost the keys three times. Every time I got a free replacement in my mailbox, overseas. That's why Kryptonite was my first option when I looked for a replacement. Since this model is not directly available in Spain, where I currently live, I had to buy an expensive Angus chain from a local German store as a temporary solution -but it was too heavy to carry it. The model I got is the longest, the LS, which is about the same length as the previous one I owned.- a few mm longer and wider. In my experience, a smaller lock is not very useful in a city with not too many parking racks. The keys are now stainless steel, and the lock has now a plastic sliding cover to protect it from the water. One of the first things I noticed is that the metal is now thicker than the one I bought in 1998. This is the opposite I expected. Also, the mounting bracket looks much better than the older one (that one lasted a few years). My bicycle frame (yes, I own the same bicycle I purchased along with the lock back in 1998!) is rather small, so I think the reviews that mention space problems to mount the bracket are misleading. The instructions give plenty of details on how to adjust the bracket, although the picture showing the recommended locations might be confusing. The lock does not have to be inside the frame, you only have to care about finding a position that does not impede your pedalling. The problem is that these instructions require the people buying this lock to be literate! :) (See attached picture) IMHO Kryptonite is one of those rare remaining American companies - like Oster and a few others- that still care about quality and customer service. And I want to add that I'm not being paid by Kryptonite to review this lock. ------ EDITION AFTER 3 YEARS OF DAILY USE: Now I notice the mounting bracket is about the same as 20 years ago. I had to tighten it too often, and I do not use it anymore. Instead, I carry the U lock hanging from the handlebar, facing down to lower the centre of gravity. I see Kryptonite has some room for improvement on this bracket. As for the lock itself, it is working like a charm. However, I recommend using a graphite powder lubricant at the first sign of difficulty opening it.

### ⭐⭐⭐⭐⭐ Strong lock
*by A***X on 8 June 2021*

Really strong good lock

## Frequently Bought Together

- Kryptonite Evolution Long Shackle Bike U-Lock, Anti-Theft Security, 14mm Steel Shackle with Mounting Bracket and Keys, High Security for Bicycles Scooters,Black
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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-14*