I hate to do this to you Rakesh, but have you thought of securing your crankset? I'm sure its an expensive jobbie. Anyway, it was first done on here by edscoble, and I use that method now also. Its clever, and really discouraging to a thief.
Am I missing something as it looks like a thief could readily remove the pedal, lift the lock and then steal the crank? It is another deterrent and it also helps to fill the space inside the D-lock, both of which are very good so even if the extra security afforded to the cranks is imperfect, it's all still good advice in my opinion.
Putting the lock through the chainwheel can physically tether that crank but it is often not possible to do that as well as going through the frame and the stand/post, and it is surely more fiddley to do.
Am I missing something as it looks like a thief could readily remove the pedal, lift the lock and then steal the crank? It is another deterrent and it also helps to fill the space inside the D-lock, both of which are very good so even if the extra security afforded to the cranks is imperfect, it's all still good advice in my opinion.
Putting the lock through the chainwheel can physically tether that crank but it is often not possible to do that as well as going through the frame and the stand/post, and it is surely more fiddley to do.