Disc locks

[Firestorm]

I am thinking of using a disc lock with a built in alarm on my bike to immobilise the back wheel .
Has anytried this and do they work.
I am only talking about short stops ( shops cafes etc) where i would be able to hear the alarm) as they are much easier to carry
Longer stops would be doubled up with a shackle but would add the benefit of the movement alarm

 

[classic33]

Used a disc lock on the Brox in addition to the normal lock.
Used the same on the bike, fitted to the rear disc. Downside of it was/is possible damage to the frame/finish if its moved whilst in place.
Motion sensor alarms can be a pain in the rear. Used to mount one low down on the rear wheel, but heavy traffic(lorries) set it off at times.
Is it one designed & built for a bike or motorbike?

 

[Firestorm]

Used a disc lock on the Brox in addition to the normal lock.
Used the same on the bike, fitted to the rear disc. Downside of it was/is possible damage to the frame/finish if its moved whilst in place.
Motion sensor alarms can be a pain in the rear. Used to mount one low down on the rear wheel, but heavy traffic(lorries) set it off at times.
Is it one designed & built for a bike or motorbike?

There are some available which are marketed as bike / motorcycle although the disks on most motorbikes are a lot thicker than my mtb
The damage element was was one of my concerns as anyone looking to nick the bike would not expect a disk lock and may force the bike before realising it has a lock on

 

[classic33]

It makes the bike harder to move, as they have to pick it up.
I've only seen one aimed at the bicycle market, and that could be cut with a hacksaw in no time.
The alarm might help.