Oxford Boss Alarmed Disc Lock
I've been living with one of these for a month now, went for it as cheaper alternative to bike alarm and can keep if I change bike....and portable.
Im not sure about other makes but this one doesnt give you very long to get the thing unlocked before it blasts your neighbours with 110db!
Its thick too so worth checking it'll fit through disc first, doesnt fit through all the bits on mine so can leave you with awkward positioning...bearing in mind you'll prob need to lift it up to see which way key goes in without bending the disk...in a v short time!
Have also found its easy to have the first key slot twisted slightly round so that you cant push it all way in without a minor adjustment...not a big deal but rem the short time you have to stop it going off lol
Getting used to it now though but still the odd moment I cant get it stopped in time.
Wow I can waffle, main thing it check is it fits through your disc.