Disc Brake Alarm Lock
Disc Brake Alarm Lock — 110 dB of "Don't Touch My Bike"
A bike thief's only real tool is silence. This lock takes it away. Clamp it onto your disc brake rotor and the moment someone bumps, lifts, or rolls the bike, a 110-decibel alarm goes off — the one thing a thief working in the open cannot afford.
It is a high-strength alloy body in high-visibility yellow, so it deters before it ever sounds: a thief sees the lock, sees the alarm, and moves on to an easier target. Push it closed to arm it, lift it off with the key, and drop it in a pocket when you're done. Lightweight, waterproof, and small enough to carry every day.
🇨🇦 Ships from Canada · Free Canada-wide shipping · 1-866-938-7580 — real humans answer
What It Does
- 110 dB vibration alarm — a sensitive built-in trigger sounds the alarm the moment the bike is bumped, lifted, or moved.
- Push-to-lock — press the lock closed and it arms instantly, no key needed. The key only comes out to unlock and remove it.
- Alloy lock body — high-strength alloy built to resist prying and casual attack.
- Double-sided milling-tooth key — a harder-to-pick key profile than a standard flat cut.
- High-visibility yellow — a lock a thief can see from a distance is a deterrent before the alarm ever sounds.
- Waterproof — built to live outdoors and shrug off rain.
- Lightweight & replaceable battery — small enough to carry every day, and when the alarm battery runs down you swap it instead of binning the lock.
- Fits many disc brakes — works on a wide range of disc rotors across eBikes, motorcycles, and scooters.
How to Use It
Find an open hole or slot in your disc brake rotor, slide the lock pin through, and push to lock — the alarm arms automatically. Move the bike and the full 110 dB alarm sounds. To remove it, turn the key and lift it off. One rule with any disc lock: always take it off before you ride.
Why an Alarm Beats a Silent Lock
A silent lock only slows a thief down — they can keep working out of sight until it gives. An alarm changes the maths entirely: the second the bike moves, 110 decibels makes everyone nearby look, and attention is exactly what a thief is trying to avoid. The loudest part of this lock isn't the metal — it's the noise. For the full layered approach to keeping an eBike where you left it, read our eBike theft protection guide.
The Honest Take
A disc lock is a deterrent and a portable second layer — not a do-everything lock. It immobilises the wheel and screams when touched, which is exactly what stops the grab-and-go thief looking for a quiet, easy target. What it does not do is chain your bike to a fixed object. For long stays or high-theft areas, run it alongside a lock that secures the frame to a rack — a heavy-duty U-lock or a steel cable lock. And the cardinal rule: take it off before you ride. Pulling away with the lock still on the rotor can damage the bike or drop you, so clip the key somewhere you'll see it.
Shipping & Delivery
- Shipping: Free Canada-wide shipping
- Delivery: Standard Canada-wide delivery as per Zeus shipping policy
- Tracking: Tracking email sent once shipped
Frequently Asked Questions
Will it fit my eBike or motorcycle disc brake?
It fits a wide range of disc brake rotors. Check that your rotor has an open hole or slot for the lock pin to pass through — most do. It works on eBikes, motorcycles, and scooters with disc brakes.
How loud is the alarm?
The vibration alarm sounds at up to 110 decibels — loud enough to turn heads across a parking lot. A sensitive built-in trigger sets it off the moment the bike is bumped, lifted, or moved.
Do I need the key to lock it?
No — it's push-to-lock. Press it closed and it arms instantly, no key required. The key, a double-sided milling-tooth profile that resists picking, only comes out to unlock and remove it.
Can I ride with the lock on?
No. Always remove a disc lock before riding — pulling away with it still clamped to the rotor can damage your bike or cause a fall. Take it off first, then ride.
Is it waterproof, and what about the battery?
Yes — it's built waterproof for outdoor use in the rain. The alarm runs on a replaceable battery, so when it eventually runs down you swap the battery rather than replace the whole lock.
Zeus eBikes Canada — Canadian eBike retailer shipping nationwide. Questions before you order? Call 1-866-938-7580 or email milad@zeusebikes.ca. Browse more eBike accessories →
Related locks & guides:
Extend Your Warranty Protection
All Zeus Ebikes come with a free 1-month limited warranty through Zeus, followed by standard manufacturer coverage (typically 1–2 years). For added peace of mind, you can choose a Zeus Extended Warranty plan below for continued direct support, remote diagnostics, and claim handling — up to 5 years.
Disc Brake Alarm Lock
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