Zovii ZT6 review | Budget alarmed disc lock
By John Milbank
Consumer Editor of Bennetts BikeSocial
08.01.2025
Date reviewed: January 2025 | Tested by: John Milbank | RRP: £16.99| Weight: 420g | www.sportsbikeshop.co.uk
The Zovii ZT6 on review here is an extremely compact alarmed disc lock suitable for motorcycle and scooter use. It’s a budget-friendly deterrent but offers very little real security…
Pros & Cons
Easy to set
Fairly loud
Cheap
Very easy to defeat
Size and weight
Made of cast zinc alloy, the Zovii ZT6 weighs just 420g, yet packs a surprisingly piercing 120dB alarm that arms automatically as the lock barrel is pushed home (there’s no need to have the key in). It’s an alternating system, so press it twice without securing and it’d disarm when locking, but just listen for the one beep that means armed, or two that means disarmed.
After five seconds on the disc, the ZT6 gives out a long beep, which means it’s active. Then, if it’s knocked or senses vibration / the bike being moved, it gives out five loud chirps. If nothing else happens in five seconds it goes back to its active state, but if movement continues the siren will sound for 15 seconds.
Indoors it’s very piercing, and outside it’s loud – certainly enough to raise attention, or to remind you that it’s fitted to prevent you riding off!
The alarm is powered by six LR44 button cells (supplied), which cost as little as 28p each from Battery Station and are said to last between eight and 12 months. As the samples were destroyed, I’ve been unable to test that duration, but it will depend on the frequency of use.
The stainless steel locking pin measures 6mm in diameter, making it suitable for use with motorcycle or scooter brake discs. It doesn’t lock into the base due to its size, and two keys are supplied.
The alarm module is a little fiddly to remove with the supplied hex key, but in my limited testing it proved to offer good resistance to rain.
Resistance to attack: lock picking
While some YouTube channels might make lock picking look easy, especially when selling the creator’s own tools, it’s not a method used in typical motorcycle thefts at all. Brute force attacks are far more likely and in the case of this Zovii ZT6, much more effective.
To see how this compares with the other locks we’ve tested, check out our best motorcycle locks for home and away.
Resistance to attack: hammer
Due to a very weak construction, striking the Zovii ZT6 with a lump hammer saw it come off the disc after just seven strikes, the body breaking where it wraps around the disc. The alarm started chirping during the attack, but stopped after four hits.
Using a claw hammer to pry it off was even easier, the right technique seeing it snap in two. The alarm started its warning, but stopped as the casing broke.
To see how this compares with the other locks we’ve tested, check out our best motorcycle locks for home and away.
Resistance to attack: angle-grinder
Both samples were destroyed in the hammer attack testing, so an angle grinder wasn’t used, however this method would be more time-consuming than hitting it.
It’s important to also understand that the weak point of any disc lock is the brake disc itself, which thieves will sometimes cut to be able to remove the lock and push the motorcycle or scooter away.
To see how this compares with the other locks we’ve tested, check out our best motorcycle locks for home and away.
Product: Zovii ZT6
Weight as tested: 420g
Sledge hammer attack: FAIL
Angle grinder attack: AVERAGE
Zovii ZT6 review review: Verdict
Disc locks with a 6mm pin can fit on the smaller brake discs found on scooters, but they do tend to be weaker. Ironically, scooters also tend to have decent amounts of storage, so you’re better off carrying a chain and / or D-lock for potentially far better security.
The Zovii ZT6 will fit most motorcycle brake discs too, and while it’s a useful deterrent – and the alarm is a good addition, especially at this price – I can’t recommend it as it’s simply too easy to defeat. Invest in the best security you can afford and it can last a lifetime.
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