Maybe stating the obvious, but if the parts on your bike are nice enough (105 and up probably) and you have a carbon frame (easy to cut) then nothing will really protect you as a thief will sacrifice the frame to get at the components (easier to sell undetected than a whole bike too)
Maybe stating the obvious, but if the parts on your bike are nice enough (105 and up probably) and you have a carbon frame (easy to cut) then nothing will really protect you as a thief will sacrifice the frame to get at the components (easier to sell undetected than a whole bike too)