>>2040291fyi the U lock goes through the frame and around the sign post or rack etc. if the stationary object is favorable, you can lock through both your frame's rear triangle and rear wheel. the rear wheel has the gears on it so it's more expensive to replace. most wheels are easy to remove so you can fix flats (quick release, through axles) so they're easy to steal. you want to get in the habit of locking them, too. you can buy or cheaply make from the hardware store a cable with looped ends that goes through the front wheel and into the U. a lot of locks come with them now. or a cheap combination cable lock works.
you can also remove the front wheel and place it along the rear and lock both wheels and the frame to the SO with a U lock provided the SO can fit in there, too. but that's a lot of time and effort so most people use U lock + cable.
there are "security skewers " with proprietary tools that turn the quick release cams so they are otherwise locked in place. but if crackheads see an unlocked wheel, decide to steal it, then discover the security skewers, they might just fuck up the wheel trying, or out of spite, because they're fiends with nothing to lose.
a lot of people have a bike to get around with a bike that intentionally looks crappy and a nice bike for rides that they never leave unattended. I just have a cable lock for my utility bike. there's security skewers on it but I still lock the cable through just as a visual way to say from afar that they are reasonably secure/not candidates for "theft of opportunity."
