OxfordOF159 HD Motorbike Chain Lock + Screamer 7 Alarm Disc Lock Yellow/Black LK290 + Free Reminder Cable 1.5M
Two locks in one box — a hardened chain for the wheel and an alarmed disc lock for the brake.
Oxford's mid-range HD chain paired with the Screamer 7 alarm disc lock, so a thief has to defeat a 9.5 mm hardened chain and set off a 100 dB siren. The padlock shackle doubles as a disc lock of its own, and a yellow reminder cable stops you riding away with the disc still locked.
Quick Specs
- Chain length
- 1.5 m
- Chain
- 9.5 mm hardened square link
- Padlock
- Double locking, hardened shackle that doubles as a disc lock
- Approvals
- ART 4114, Sold Secure Motor Scooter Silver
- Alarm
- 100 dB siren
- Sensors
- Motion and shock
- Disc lock pin
- 7 mm
- Alarm battery
- Lithium CR2
9.5 mm hardened square links
Square links are harder to get a bolt cropper jaw around than round ones, and the fabric sleeve keeps the chain off your paintwork while you thread it through a wheel.
The padlock is also a disc lock
The double-locking shackle is short enough to pass through a brake disc on its own, so you can leave the chain at home for a quick stop and still lock the bike.
100 dB alarm on the disc
Motion and shock sensors trigger the Screamer 7 siren, so an attempt to move or lever the bike draws attention rather than passing quietly.
Reminder cable included
A 1.5 m bright cable runs from the disc lock to the bars. Riding off with a disc lock still fitted is how people bend forks and drop bikes, and this is the cheap fix for it.
Independently rated
ART 4114 approved and Sold Secure Motor Scooter Silver — an actual third-party test result rather than a manufacturer security claim.
Three keys, and replacements
Both locks ship with keys and a key replacement service. Note the key number down when it arrives — that is what a replacement is cut from if you lose the set.
Pros
- Amazon's Choice, 4.3 from 274 reviews with 300+ bought in the past month
- Two separate locks in one purchase — chain for the wheel, alarmed disc lock for the brake
- Independently rated: ART 4114 and Sold Secure Motor Scooter Silver
- Amazon's review summary reports buyers rate the chain quality, durability and value highly
- Reminder cable and key replacement service included rather than sold separately
Cons
- Amazon's review summary flags that some buyers report the alarm stops working after getting wet, despite the water-resistant keyway cover
- Sold Secure Motor Scooter Silver is a mid-tier rating — Oxford describe it as a mid-range lock, and Gold or Diamond chains resist a determined attack for longer
- Alarm volume draws mixed comments: some buyers find 100 dB not deafening, others find it too loud
- 1.5 m is enough for a wheel and a post but short for chaining through several bikes
A sensible bundle: the chain earns its reputation and the alarmed disc lock adds a layer most riders skip, all for less than the two bought separately. It is a Silver-rated deterrent rather than a fortress, and the alarm electronics are the weak link buyers report — so treat the chain as the real security and the siren as a bonus.
Best For
- Everyday parking where a visible chain plus an audible alarm is the deterrent that matters
- Riders who want one purchase that covers both a chain and a disc lock
- Scooters and mid-value bikes, which is the risk tier this rating is aimed at
Not Ideal For
- High-value bikes left on the street overnight, which warrant a Sold Secure Gold or Diamond chain
- Permanently outdoor storage, given the reported alarm faults after water exposure
- Securing several bikes at once, or reaching a distant anchor point, at 1.5 m
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View All FAQs →How secure is it really?
It carries ART 4114 approval and a Sold Secure Motor Scooter Silver rating — independently tested, and mid-tier. Oxford themselves describe the HD chain as a mid-range lock that is light enough to carry but secure enough to deter opportunists. For a high-value bike left out overnight, a Sold Secure Gold or Diamond chain is the right step up.
How does the alarm work?
The Screamer 7 uses motion and shock sensors to trigger a 100 dB siren, powered by a lithium CR2 battery, and locks with a simple push. Worth knowing that Amazon's review summary reports some buyers finding the alarm stops working after it gets wet.
What is the yellow cable for?
It is a reminder cable. You run the 1.5 m bright cable from the fitted disc lock to your handlebars so you cannot ride off with the lock still on the disc — which is how forks get bent and bikes get dropped.
What if I lose the keys?
Both locks come with keys and a key replacement service. Make a note of the key number when the lock arrives and keep it somewhere safe — a replacement is cut from that number if the whole set goes missing.