On Sat, 26 Nov 2005 16:56:54 +0000, Steve Robinson wrote: [QUOTE] If you want the alarm mainly to alert you if the bikes on your own property or outside the house...[/QUOTE] Anybody know if those disc-locks (and other locks) with built-in alarms are any good? I'd probably couple one with a "proper" lock and chain, but is the alarm function effective?