Alanbikehouston you may bea resident guru but I have the experience to back up my claims. And don't you think that Kryptonite or any U-lock maker wants you to belive it is "not true" Of course they do. The metal has to be chilled so deeply that it crystalizes when struck. An "earnest effort" will not do it. A determined one will. Here is my response to the skeptics. Read on:

--------------------------------

Well my friends I do not know what type "coolant you used but it was not done properly. And the harder and tuffer the steel used in the lock the better they shatter! Platinum schmatinum:-))

I use electronics troubleshooting freeze spray in a can. It cost around $3-5 per can and you need to use the entire can and concentrate the freezing in one area near the shackle. You may need gloves to keep your skin from being damaged.

Concentrate the spray in one area of the shackle near where the shackle and bar meet. Be sure to get coverage all the way around. When you see ice krystals standing out from the lock and the can is about empty you need to work fast. The metal will shatter if the lock is made cold enough and struck boldly enough

Brace the back of the intersecting bar or massive portion of the mechanisim with the heavy backstop and strike with max, sheering force on the frozen area. I have done this many times and practice does make perfect. The blow is like a karate blow. Very fast and think of swinging through the point struck. I would recommend protective goggles.

I am not sorry you or others may not have it figured out. We have enough folks doing it for the wrong reasons already.

Disclaimer: I am not responsible and neither are the Bike Forums if you hurt yourself trying this!

Slim

Addendum. This is formt he "lockit" site;

FREEZING: Although not a myth, deep-freezing of locks, with Freon, is not that easy to do. Yes, cheaper ,lower quality, locks will snap easily when made more brittle but those locks will usually be broken by conventional methods too. Locks like ABUS Granit series are tested to withstand -40�. Freon only freezes to -20�. Plus, Freon is expensive and hard to get (licensed). Again, do not leave your chain or lock on the ground. You are making it way to easy for thieves to cut them off.

I do not use Automotive freon. It is only good oncheaper locks. Slim