Make your bike look crap and not worth anything, if thieves don't think they can sell it hopefully they'll leave it alone.
Or get a dangerous dog and tie that to your bike whenever you lock it up.
@Booga started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Make your bike look crap and not worth anything, if thieves don't think they can sell it hopefully they'll leave it alone.
Or get a dangerous dog and tie that to your bike whenever you lock it up.