Then put the U lock around the seat post (i.e. frame) AND the tire.

Also, look at the price of a new rear wheel. Without the rear wheel, the bike loses a lot of value.

There's also another video around that shows it to not be quite so easy for a properly built bike tire - it's hard to cut when the rim is in compression from spoke tension (it jams up). I just can't find it.

What I can tell you is that my son rides his bike year round at the University of Minnesota, an urban campus, and this has worked for him (and therefore, me). The bike is outside 24/7.

Finally, any lock can be defeated. The trick is to make your bike more difficult than the others nearby.

J.