---
product_id: 777441007
title: "Bike U Lock - Sigtuna Bike Lock Cut Resistant, Heavy Duty Anti-Theft with 4ft/1.2m Cable, Bicycle Lock Made in Cut-Resistant Special Steel with Sturdy Mounting Bracket for Bikes, Ebikes, Scooters."
brand: "sigtuna"
price: "$125.52"
currency: USD
in_stock: true
reviews_count: 8
category: "Sigtuna"
url: https://www.desertcart.us/products/777441007-bike-u-lock-sigtuna-bike-lock-cut-resistant-heavy-duty
store_origin: US
region: United States of America
---

# 4ft/1.2m flexible anti-theft cable included 16mm cut-resistant steel core Dual locking mechanism for max security Bike U Lock - Sigtuna Bike Lock Cut Resistant, Heavy Duty Anti-Theft with 4ft/1.2m Cable, Bicycle Lock Made in Cut-Resistant Special Steel with Sturdy Mounting Bracket for Bikes, Ebikes, Scooters.

**Brand:** sigtuna
**Price:** $125.52
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock it down, stand out—security that means business.

## Quick Answers

- **What is this?** Bike U Lock - Sigtuna Bike Lock Cut Resistant, Heavy Duty Anti-Theft with 4ft/1.2m Cable, Bicycle Lock Made in Cut-Resistant Special Steel with Sturdy Mounting Bracket for Bikes, Ebikes, Scooters. by sigtuna
- **How much does it cost?** $125.52 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/777441007-bike-u-lock-sigtuna-bike-lock-cut-resistant-heavy-duty)

## Best For

- sigtuna enthusiasts

## Why This Product

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

## Key Features

- • **Ready to Roll:** Sturdy mounting bracket lets you carry your lock hands-free and stay ready for the next adventure.
- • **Double Defense:** Dual locking mechanism demands two cuts to breach—because one just isn’t enough.
- • **Unbreakable Armor:** Crafted from cut-resistant special alloy steel to keep your ride safe in any urban jungle.
- • **Versatile Security:** Includes a 4ft/1.2m heat-resistant cable for locking accessories or additional security layers.
- • **Effortless Handling:** Smooth-turning key lock designed for quick, hassle-free locking and unlocking.

## Overview

The SIGTUNA Bike U Lock combines a 16mm cut-resistant alloy steel core with a dual locking mechanism and a 4ft/1.2m heat-resistant cable, delivering heavy-duty anti-theft protection for bikes, e-bikes, and scooters. Designed for professionals who demand both security and convenience, it features a smooth key lock and a sturdy mounting bracket for easy transport.

## Description

desertcart.com: Bike U Lock - Sigtuna Bike Lock Cut Resistant, Heavy Duty Anti-Theft with 4ft/1.2m Cable, Bicycle Lock Made in Cut-Resistant Special Steel with Sturdy Mounting Bracket for Bikes, Ebikes, Scooters. : Sports & Outdoors

Review: Nice lock, works well, seems secure. Heavy but not overly so. - I wanted to upgrade my bike lock (actually, one of my bike locks - I use two U-locks in the city) to one that was thicker and - more important - has dual locking mechanisms so that two cuts would be required to remove the lock. The Sigatuna is a bit thicker, and has the dual locking mechanism (there seems to be some controversy as to whether its really 16mm or whether that is padded by the plastic coat on the steel - I don't know the answer). I thought the reviews here were encouraging so ordered it. I've been quite happy with it for the 1 month I've had it. Its a bit heavier than my other U-lock (Krypto-Lok) but definitely not "too heavy". And I suspect its much better security. The key has been easy to turn - something that was a problem with the other Master U lock I had that this replaced. I don't use the frame mounting bracket so can't comment on that - I have a rat-trap carrier and I keep it in that secured with a bungee cord. And I actually don't use the cable - and I think its generally a bad idea because all of them are easily cut. I have found that a much more convenient and secure way is to have two U locks. So I have this as my "heavy duty" lock, and a Krypto-Lok as my secondary one (and which fits through the perforations on my helmet allowing that to be securely locked to the bike). A second U lock is so much more convenient to carry than a cumbersome cable. I have the Kryptonite lock mounted to the frame, and keep the Sigatuna lock in the rat-trap carrier. It doesn't offer theft protection insurance - but that doesn't bother me. (1) My bike isn't worth that much - less than the deductible! Well, its wort a lot to me, but not money. (2) Somehow I suspect that the fine print on all those bike lock insurance plans are smarter than most bicyclists - and I rather doubt they really ever pay.
Review: Locked up - Just what I expected good quality and good price

## Features

- Bike U Lock

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | SIGTUNA |
| Item dimensions L x W x H | 5.47 x 1.4 x 6.77 inches |
| Lock Type | Combination Lock |
| Material | Alloy Steel |
| Recommended Uses For Product | Securing bicycles |
| Special Feature | Heat Resistant |

## Product Details

- **Brand:** SIGTUNA
- **Item dimensions L x W x H:** 5.47 x 1.4 x 6.77 inches
- **Lock Type:** Combination Lock
- **Material:** Alloy Steel
- **Special Feature:** Heat Resistant

## Images

![Bike U Lock - Sigtuna Bike Lock Cut Resistant, Heavy Duty Anti-Theft with 4ft/1.2m Cable, Bicycle Lock Made in Cut-Resistant Special Steel with Sturdy Mounting Bracket for Bikes, Ebikes, Scooters. - Image 1](https://m.media-amazon.com/images/I/71skezzjbNL.jpg)
![Bike U Lock - Sigtuna Bike Lock Cut Resistant, Heavy Duty Anti-Theft with 4ft/1.2m Cable, Bicycle Lock Made in Cut-Resistant Special Steel with Sturdy Mounting Bracket for Bikes, Ebikes, Scooters. - Image 2](https://m.media-amazon.com/images/I/71hudV9-ZAL.jpg)
![Bike U Lock - Sigtuna Bike Lock Cut Resistant, Heavy Duty Anti-Theft with 4ft/1.2m Cable, Bicycle Lock Made in Cut-Resistant Special Steel with Sturdy Mounting Bracket for Bikes, Ebikes, Scooters. - Image 3](https://m.media-amazon.com/images/I/71l6LMBZ7lL.jpg)
![Bike U Lock - Sigtuna Bike Lock Cut Resistant, Heavy Duty Anti-Theft with 4ft/1.2m Cable, Bicycle Lock Made in Cut-Resistant Special Steel with Sturdy Mounting Bracket for Bikes, Ebikes, Scooters. - Image 4](https://m.media-amazon.com/images/I/81-UA6bTzrL.jpg)
![Bike U Lock - Sigtuna Bike Lock Cut Resistant, Heavy Duty Anti-Theft with 4ft/1.2m Cable, Bicycle Lock Made in Cut-Resistant Special Steel with Sturdy Mounting Bracket for Bikes, Ebikes, Scooters. - Image 5](https://m.media-amazon.com/images/I/716SZ+rWIkL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Nice lock, works well, seems secure. Heavy but not overly so.
*by R***N on December 2, 2018*

I wanted to upgrade my bike lock (actually, one of my bike locks - I use two U-locks in the city) to one that was thicker and - more important - has dual locking mechanisms so that two cuts would be required to remove the lock. The Sigatuna is a bit thicker, and has the dual locking mechanism (there seems to be some controversy as to whether its really 16mm or whether that is padded by the plastic coat on the steel - I don't know the answer). I thought the reviews here were encouraging so ordered it. I've been quite happy with it for the 1 month I've had it. Its a bit heavier than my other U-lock (Krypto-Lok) but definitely not "too heavy". And I suspect its much better security. The key has been easy to turn - something that was a problem with the other Master U lock I had that this replaced. I don't use the frame mounting bracket so can't comment on that - I have a rat-trap carrier and I keep it in that secured with a bungee cord. And I actually don't use the cable - and I think its generally a bad idea because all of them are easily cut. I have found that a much more convenient and secure way is to have two U locks. So I have this as my "heavy duty" lock, and a Krypto-Lok as my secondary one (and which fits through the perforations on my helmet allowing that to be securely locked to the bike). A second U lock is so much more convenient to carry than a cumbersome cable. I have the Kryptonite lock mounted to the frame, and keep the Sigatuna lock in the rat-trap carrier. It doesn't offer theft protection insurance - but that doesn't bother me. (1) My bike isn't worth that much - less than the deductible! Well, its wort a lot to me, but not money. (2) Somehow I suspect that the fine print on all those bike lock insurance plans are smarter than most bicyclists - and I rather doubt they really ever pay.

### ⭐⭐⭐⭐⭐ Locked up
*by F***. on January 25, 2026*

Just what I expected good quality and good price

### ⭐⭐⭐⭐ Seguridad
*by H***O on July 22, 2025*

Perfect, very strong and resistant, excellent security

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-05*