Problems with Cycling Equipment?

[Shut Up Legs]

Not sure if its possible but a lock out nut for the front/back wheel that would mean the bike couldn't be pushed for a quick nip into the shop

These already exist: http://www.pinheadcomponents.com/index.php?option=com_content&task=view&id=35&Itemid=56

 

[Easytigers]

Cool! Will check them out. Guess that just shows that many bases will have already been covered. The OP is going to find it truely difficult to completely innovative...