Disc lock, yes, but mostly it is just a visible and audible deterrent. I can hear it from my bedroom when it goes off on the drive, and that's good enough for me.
And I can carry it when I go out, slap it on a disc and there's a noise when anyone tries to move the bike.
And they're just the right thickness to put one under the sidestand to hold it almost upright when checking the oil.....result.
But you need to replace the six little cells inside quite often, at least every six months, so buy cells in bulk.
It's not falling off, it's an upgrade opportunity.
“Only by constantly developing your insight and knowledge can you fulfil your responsibility to ride safely and effectively†“He who rides fastest, rides alone!" YouTubeWebsiteFacebookBike accessories
i've had one for ages and batterys are still okay, loud ear pierceing whailing noise but get one of thoes reminder things as ive ridden off twice with it still on http://www.ebay.co.uk/itm/DISC-LOCK-REM ... 0836679496
One of these, had it for years.
Also a boss alarm lock when it's going to be left more than just during the day.
One will go off while they're trying to cut or break the other.
Don't bother about the spiral string, just leave your bike keys in the pouch and you have to get the pouch in your hand and so can't ride off and forget.
It's not falling off, it's an upgrade opportunity.