On Monday, August 19, 2019 at 12:21:11 AM UTC+1, Jeff Liebermann wrote:

Ever notice that many bicycle locks do not require a key to lock? Just
close the hasp, and it's locked.

Jeff also sent some lock picking videos. Those links must burn the companies who made those locks. But lotta lock-makers and -users miss the point altogether. No lock is undefeatable -- all it can do is deter or delay a would-be thief. That said, some locks do that better than others.

One class of lock that I like is the Dutch ring lock, which is permanently attached to the seat stays and locked by removing the key; they're very difficult to bring an angle grind to bear on. You can see a ring lock in the fourth photo from the bottom at this link -- it is the component with the orange handle:
http://coolmainpress.com/BICYCLINGsmover.html
Some of that type come with a hefty plug-in chain which unlocks with the same key.

What I use nowadays to secure my bike is altogether more subtle. I simply present the bike as broken, the front wheel turned at a crazy angle different to the handlebars. This is done by a nifty piece of Swiss engineering called an n'lock (sic; all lc) which unlocks the handlebar from the steerer, thus making the bike unrideable. There's also a cable inside the handlebar that wraps around whatever you can find that plugs into the n'lock (which incorporates its own stem) and is unlocked with one twist of the key, but I rarely bother with it; there is also a longer loose cable with a loop at one end and the locking pin at the other but I don't even carry it. You can see the n'lock and its cables in action he
http://thorncyclesforum.co.uk/index....18768#msg18768
Very few people here drive trucks that they can boost even a broken bike onto and a rideaway thief dumb enough not to notice that the bike is broken will be planted face first into the tarmac within a couple of paces. Here are some unfortunate experiences of my own when I forgot the n'lock was in operation:
http://thorncyclesforum.co.uk/index....21571#msg21571

Deep wisdom found on the net:

1. Pqrst Zxerty says:
"Soon your locks are worth more than your bike that they cut throu your bike frame to steal the locks."

2. regular everyday normal modafuka says:
"I bought someone from a poor country to stand by my bike when I'm shopping.."

Andre Jute
70% of bikes stolen in France are stolen to order from people's homes