Maybe. I was at my LBS when a twentysomething kid and his dad came in for a new wheel for his rusty beater bike. The old wheel hadn't broken -- it had gotten stolen. He had gotten that bike exactly for the reasons you describe, that it would be ignored because it's so old and crappy-looking.

Thieves will take anything, especially if it results in an operable bike somewhere else.

+1
A bike locked to the same pole as mine (a totally crappy old Russian beater) was recently stolen. Mine expensive bike was untouched. Mine had a top of the line U-lock, the beater had a flimsy cable lock.

Thanks mate! Now I have a better understanding.

It seems that the polygonal approach will give a higher likelihood for the slippage of the bolt cutters if it were already locked onto the vertex of the shackle...

So...I may have asked this before in this thread, but I'm sure I'd remember if I had actually gotten an answer. How would you get this done, and has anyone else actually gotten kryptonite to key 2 different locks (like a chain and a ULock) the same?

I've inquired through their website, through local bike shops...the answer always comes back as either "Kryptonite doesn't do that" or "Kryptonite only does that on their high end locks, and only for bike shop where they're ordering a ton of locks at once". :-(

I agree.

bump
...for a valuable thread

That's what happened to me in NY :/ they couldn't get past my NYFU U lock, even though I ended up having to leave the bike out in harlem for a week. So they just destroyed everything they could. Everything completely mangled. bastards!

Probably, but a friend got her expensive bike stolen while locked with a heavy-duty U lock (Fahgettaboudit from Kryptonite) to a lamppost on a busy street just a few meters from the cashier of a theater; They heard nothing, we found no trace of theft on the premises although I doubt the thief would sweep afterwards. Thus, it's likely that this was done by someone who does know how to pick locks. With the right tool and the right experience, it only takes 1-5mn to pick a lock:

Numerous bikes have also been stolen while "secured" with Abus Bordo locks:

The question I had is: Do U locks use different types of locks? If that's the case, is it possible to tell the type used by looking at the key, and which one is the most secure?

Thank you.

"Thieves do not pick locks, they break them"

Are there any material that you can apply to your lock that can gum up and wear down what's trying to cut or grind your lock?

Thread from the dead!

Picking locks isn't easy, it's a skill that takes a lot of time to develop, and picking the sorts of locks used in most modern bike locks is really difficult. I'm pretty decent with a pin tumbler lock, a useful skill to have if you are perpetually loosing your keys, and I'm absolutely flummoxed by the disc tumbler locks most manufacturers use.

The only type of key I would avoid is the tubular pin tumbler lock that kryptonite used to use. The one that could be easily opened with a bic pen.

OnGuard Vs Kryptonite is only 2 of the US seller brands , ABUS of Germany Is also Exported to the US, as Is AXA from the NL.

I have used Chains from those 2 companies , rather than cables, To augment my other locks, they also make.

then again, I retired in a Low population area..

Good Luck !

I have used Line U lock with bike and when the thieves are not able to unlock it they have destroyed the whole bike.It was newly installed lock in the bike by a Locksmith.

Abus Bordo is not a very good lock.
Abus Bordo Granit X-Plus, about 80 euro costing one, is a very good lock.

How to tell a good lock:
Bicycle locks

How to lock a bicycle:
Locking a bicycle