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Comment by agumonkey | Hacker News Reader

Harsh reality : cable locks below 4cm diameters are useless (only useful for young kids I guess). Even fat 2kg cable lock are useless, anyone can rob a bike in a street, the bolder the easier.

I'm still waiting for a cheap bike gps 'self powered' tagger so I can use a bike again.

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I've always wanted to build a spring loaded 30cm titanium spike that would shoot from the seat pole through the seat if not disarmed. Obviously completely illegal, but a satisfying mental exercise.

"this bike is a pipe bomb"

https://farm4.static.flickr.com/3277/3011586006_42403e0788.j...

It was a folkie punk band ;) With that promotional sticker. I had one, but didn't put it on my bike.

Nice alarm system that consists of a sticker.

Maybe. Except for the "brought in for questioning by police, bike impounded, paying for a lawyer, etc" parts :(

I must say, however, that after my new (expensive, and lovingly customized and maintained) bike was stolen, I did fantasize about remote-controlled explosives. But then I just filed an insurance claim, and replaced it ;)

In most first world countries that sticker would just get your bike taken by the police instead of a thief.

When I was in college, like many struggling students, I didn't have much money, my means of transportation was a 3 speed Stermy-Archer 3 speed bike that had the best security system ever, I never locked it. It had something wrong with the 3 speed and if you stood up on the pedals it would slip and the rider would end up with their taint on the center bar, ouch. It was fine if you were not in a hurry and took your time. There were a number of times when I came out of class and would find it laying on the ground about 30 feet from where I had parked it.

You must have had a nice grin seeing that. I also read reverse psychology tricks on biking boards such as not locking the bike, which convey a sense that the owner is not far / in sight and scare most robbers. Requires balls.

OK, one more of my dopey stories.. I live on the shores of Lake Washington and some years back (when I was a lot younger) I was into wind surfing and I had a pretty nice rig. I was moving to a new place and I had long since drifted away from the hobby of wind surfing to I list my board and rig to sell, but I didn't get any responses so for a fun experiment I carried it across the street and rigged it up and just left it there and went back to my place and sat back to see how long before someone would steal it. It was there for a day and a half and a nice young man called and said he wanted to buy it. He seemed nice so I told him where it was and that he could just go get it and it would be his for free (he could barely believe it). About 30 minutes later I saw a young guy packing it up and taking it away. I felt kinda good about it I guess, hoping he would have fun with it. A few hours later he called sounding very anxious and apparently his parents did not believe the story. So I told them to come by, which they did. His father insisted that they pay me something for it, I relented and told them I would give the money to charity. Sometimes something like that happens, and it just renews your faith in people.

Just like people reading comments 13 days ago on buried threads. Very very nice story.

The classic reason for that fault in an old 3-speed SA is minor misadjustment of the gear change cable. The gear lever basically pulls a chain further and further out of the hub, going from 3 at minimum pull to 2 to 1. Unfortunately there's a "neutral" between 3 and 2, so the cable needs to be carefully adjusted so that the 3/2/1 positions of the lever give you all three gears and avoid the neutral section. This design defect was apparently rectified in later versions of the 3-speed hub at some point after SA were bought by Sun Race.

Still, I wouldn't personally ever stand up to pedal on an SA 3-speed unless I personally owned it and knew its maintenance condition...

Reason number 259 why I love HN, invariable there is someone who knows the technical reason behind something like this. I love it :)

If you can read German: https://fahrradjaeger.de/

Or do what the Japanese do: every bike has a serial number etched into the frame and is registered to you (similar to a car). If your bike is ever stolen, the police can trivially find it by the serial number and return it.

In Sweden we use our personal number etched into the frame but the thiefs just files it away and sells it as second hand.

I believe every modern bike has a unique frame number stamped. If the police recovered a known-stolen bike it could be returned. However, buyers and bike shops don't make a habit of running frame numbers past the theft database, so it's mostly useless.

Nobody in Japan owns a file?

No one will buy a bike without a number.

This is another example of something that works great in Japan and wouldn't work at all elsewhere. In other countries (esp. anywhere in the Americas), this would never work, because there's no shortage of someone willing to buy something that may be stolen.

Well, in Germany such concepts seem to be very successful, too.

Every car has a serial number in several places, in theory it should be trivial to find a stolen one, yet plenty of cars are stolen each yer. Clearly this does not solve the problem.

It solves the problem in Japan. Japan just isn't like other countries; they have citizens who actually care about their society and don't want to be seen as leeches on it.

It's no wonder they don't want to import a bunch of foreigners. I can just imagine how their society would be completely ruined if they allowed millions of Americans to move in. Bike theft would be the least of their problems.

The question is - would japan have a bike theft problem without bike registration scheme? I suspect not, for the reasons you mentioned. In which case, the registration numbers are more of a curiosity than anything.

My own country(Poland) had mandatory bike registration 30 years ago(during communist rule) and no, it didn't stop bike theft.

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