Disc brake alarm padlock.
slight movement and the alarm scream at 120dB
An alarm would be be useful in that security respond immediately to any alarms going off.
Exactly, it raised attention.
Only problem if there's other using the bike rack as well, and a slight touch will set it off.
@Stonehedge started
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Disc brake alarm padlock.
slight movement and the alarm scream at 120dB