If two Krypto U-locks are too cumbersome to carry around, I might suggest leaving a padded Fahgettaboudit steel chain at the bike rack or in your office. Fasten the chain together with a triple chrome plated, freon spray proof, rockwell hardened German ABUS Granit padlock (Used for Harley Davidsons). Properly running the 5 ft chain through your frame and both wheels, will require the thug to resort to torch cutting the bike rack. A hacksawed frame doesn't fetch much on e-bay or craigslist these days.