Whether you use your bikes every day, or store them for the winter, what are the advantages to keeping your bike off the ground (besides the obvious of saving room)?

Does it allow your tires to last longer, or perhaps not lose air pressure over time?

There really isn't anything you can do to stop seepage. I would guess you could add Slime, but it's probably more hassle than anything.

Its in the garage and hanging at a height where I can attend to the the drive train. If the bike were on the ground, I would have to stoop down to work on it or get a bike stand.

Tires will always lose air over time; just pump them as necessary (which is why it's always a good idea to have a floor pump at home).

I just park mine by the wall in my apartment. If I need to work on them, for now I hang them by the seat on the pullup bar in a doorway. I want to get a proper workstand, though.

To avoid losing air, keep wheel in a pressurized vessel, found in any university physics lab.

But seriously, yer over-thinking this one.

Get to the drivetrain... have u tried flipping bike upside down?

Doesn't always work, depending on the shifters & brakes.