Oxford U-Locks are the benchmark for motorcycle security in Australia. Hardened steel shackles, anti-drill lock cylinders and integrated bracket mounts make these the go-to choice for riders who take theft prevention seriously. Choose a single shackle or duo combos pairing a U-lock with a 1.2m braided steel cable.
Oxford Magnum U-Lock (170X285MM) with Bracket
Oxford Sentinel Pro U-Lock 260mm X 177mm
Oxford Sentinel Duo 14mm U-Lock with 1.2m Steel Cable
Oxford Magnum U-Lock (170X315MM) with Bracket
Why a quality U-lock is non-negotiable
A U-lock is the single most effective deterrent against opportunistic motorcycle theft. The hardened steel shackle resists bolt-cutter attacks, while a quality anti-pick, anti-drill cylinder protects the locking mechanism. Oxford's range covers shackle widths from 14mm up to heavy-duty profiles, with internal clearance dimensions of 170mm x 285mm, 260mm x 177mm, 170mm x 315mm and 315mm x 170mm, giving you options to secure your wheel to a post or ground anchor regardless of frame geometry.
Shackle size and fitment guide
Matching the U-lock to your security anchor is critical. A tighter fit leaves less lever room for an attacker. Use the internal clearance figures below to match the lock to your wheel size and anchor point.
| Model | Shackle Diameter | Internal Width | Internal Height | Cable Included |
|---|---|---|---|---|
| Oxford Magnum U-Lock (Standard) | Heavy-gauge hardened steel | 170mm | 285mm | No (bracket included) |
| Oxford Magnum U-Lock (Large) | Heavy-gauge hardened steel | 170mm | 315mm | No (bracket included) |
| Oxford Magnum Duo (Large) | Heavy-gauge hardened steel | 315mm | 170mm | Yes , 1.2m steel cable |
| Oxford Sentinel Pro | Heavy-gauge hardened steel | 260mm | 177mm | No |
| Oxford Sentinel Duo | 14mm hardened steel | Sentinel profile | Sentinel profile | Yes, 1.2m steel cable |
Single lock vs duo system
A single U-lock secures your wheel to one fixed point. A duo system adds a 1.2m braided steel cable, letting you loop through the frame or a second wheel simultaneously. Two independent locking points force a thief to carry and use 2 different attack tools, which dramatically increases time and noise on site. For overnight or unattended street parking, a duo system is the stronger choice. For quick stops with the bike in sight, a single bracket-mounted unit is fast and sufficient.
Mounting, carry and full-kit security
Every Oxford U-lock in this range ships with a frame bracket mount. The bracket attaches to the frame or subframe, keeping the lock accessible without adding bulk to your kit. Lock bodies are rubber-coated to prevent paintwork scratches during removal and reinsertion at speed. Pairing a reliable U-lock with CE Level 1 or CE Level 2 certified riding gear, including jackets rated to EN 17092 AA or AAA abrasion standards, gives you layered protection: security for your bike, certified protection for your body.
Frequently asked questions
What shackle diameter should I look for in a motorcycle U-lock?
The Oxford Sentinel Duo uses a 14mm hardened steel shackle, which resists standard bolt-cutter jaws. Heavier-gauge shackles on the Magnum and Sentinel Pro series offer additional resistance. As a rule, the thicker the shackle, the longer an attack takes.
What is the difference between a U-lock and a duo lock system?
A standard U-lock secures one point, typically the rear wheel to a fixed anchor. A duo system pairs the U-lock with a 1.2m braided steel cable, allowing you to loop through a second wheel or the frame at the same time. Two independent locking points require two separate tools to defeat.
Do Oxford U-locks come with a bracket to mount on the motorcycle?
Yes. Every Oxford U-lock in this range includes a frame-mounted bracket so you can carry the lock on the bike without adding it to a bag. The bracket is adjustable and the lock body is rubber-coated to protect your paintwork.