---
product_id: 14091925
title: "U-Lock Keyed Bike Lock, 7-1/4-inch Anti-Theft Device, 8320D | Keyed Bike Lock For Bicycles and Outdoor Equipment Provides Anti-Theft Security, Hardened Steel Body Resists Cutting, Prying"
brand: "master lock"
price: "$47.14"
currency: USD
in_stock: true
category: "Master Lock"
url: https://www.desertcart.us/products/14091925-u-lock-keyed-bike-lock-7-1-4-inch-anti
store_origin: US
region: United States of America
---

# Double-locking shackle for max pry resistance Hardened steel body resists cutting & sawing Compact 7-1/4 inch size fits most bikes U-Lock Keyed Bike Lock, 7-1/4-inch Anti-Theft Device, 8320D | Keyed Bike Lock For Bicycles and Outdoor Equipment Provides Anti-Theft Security, Hardened Steel Body Resists Cutting, Prying

**Brand:** master lock
**Price:** $47.14
**Availability:** ✅ In Stock

## Summary

> 🔐 Lock in peace of mind, ride with confidence.

## Quick Answers

- **What is this?** U-Lock Keyed Bike Lock, 7-1/4-inch Anti-Theft Device, 8320D | Keyed Bike Lock For Bicycles and Outdoor Equipment Provides Anti-Theft Security, Hardened Steel Body Resists Cutting, Prying by master lock
- **How much does it cost?** $47.14 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/14091925-u-lock-keyed-bike-lock-7-1-4-inch-anti)

## Best For

- master lock enthusiasts

## Why This Product

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

## Key Features

- • **Urban-Proof Design:** Imposing 7-1/4 inch U-lock size deters thieves in any environment.
- • **Scratch-Free Confidence:** Protective vinyl coating preserves your bike’s finish while locking down safety.
- • **Pick-Resistant Precision:** Integrated disc keyed locking mechanism blocks lock-picking attempts.
- • **Unmatched Anti-Theft Armor:** Hardened steel body and double-locking shackle keep your bike untouchable.
- • **Effortless Security On-The-Go:** Lightweight design with included carrier bracket for seamless transport.

## Overview

The Master Lock 8320D U-Lock is a 7-1/4 inch anti-theft bike lock crafted from hardened steel with a double-locking shackle and integrated disc keyed mechanism. Designed for superior cut, pry, and pick resistance, it features a protective vinyl coating and includes a carrier bracket for easy transport. Trusted by thousands, it offers professional-grade security for urban and suburban cyclists alike.

## Description

The Master Lock U-Lock is engineered for those who value their ride. This bicycle lock offers unparalleled security to ensure your bike stays right where you left it. It is crafted from hardened steel that can withstand significant impacts and resist all manner of attempts at tampering or cutting. This makes it an exceptional choice among bike locks for anyone serious about anti-theft security. The bike lock body is 7-1/4 inches wide with a 9-inch shackle length. Whether you are locking up your bicycle in a bustling urban environment or a quieter suburban area, trust that this heavy-duty bike lock has you covered. Its imposing presence alone deters would-be thieves before they even think about attempting anything nefarious. But what sets this U-lock bike apart from others? The answer lies in its intuitive design and ease of use. Despite its strength and durability, the Master Lock 8320D U-Lock is incredibly user-friendly. It boasts a double-locking mechanism providing twice the security while ensuring quick access when you need to unlock it swiftly. Lightweight yet sturdy, this U-lock fits easily into most backpacks or bike accessory bags without weighing you down. Investing in the Master Lock U-Lock means investing in long-term security for your precious ride. Unlock superior protection now with Master Lock: where studied design meets impenetrable strength.

## Features

- Hardened steel body resists cutting, sawing and prying.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit.
- Double locking shackle for superior pry resistance
- Protective vinyl coating helps prevent scratching
- Integrated disc keyed locking mechanism for maximum pick resistance
- Carrier bracket included for easy transportation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00QJRKSTQ |
| Additional Features | Unlock keys |
| Best Sellers Rank | #767 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Bike U-Locks #312 in Hardware |
| Brand Name | Master Lock |
| Color | Black |
| Connectivity Protocol | Wi-Fi |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.5 4.5 out of 5 stars (5,001) |
| Finish Types | Polished |
| Global Trade Identification Number | 00071649205255 |
| Included Components | Lock |
| Item Dimensions | 9.8 x 7.42 x 1.35 inches |
| Lock Type | Key Lock |
| Manufacturer | Master Lock |
| Manufacturer Part Number | 8320D |
| Material Type | Alloy Steel, Vinyl |
| Model Name | 8320D |
| Model Number | 8320D |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Recommended Uses For Product | Bike |
| Shape | U Shape |
| Style Name | Lock |
| UPC | 071649205255 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Master Lock
- **Item dimensions L x W x H:** 9.8 x 7.42 x 1.35 inches
- **Lock Type:** Key Lock
- **Material:** Alloy Steel, Vinyl
- **Special Feature:** Unlock keys

## Images

![U-Lock Keyed Bike Lock, 7-1/4-inch Anti-Theft Device, 8320D | Keyed Bike Lock For Bicycles and Outdoor Equipment Provides Anti-Theft Security, Hardened Steel Body Resists Cutting, Prying - Image 1](https://m.media-amazon.com/images/I/61Qpogjaf7L.jpg)

## Available Options

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

## Frequently Bought Together

- Master Lock Black Bike Lock with Key, Standard Size U-Lock for Bicycles and Other Outdoor Equipment, Anti-Theft Lock for Bikes, 8320D
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- Master Lock Cable Lock, Set Your Own Combination Bike Lock, 6 ft. Long, Black, 8122D

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-14*