Pake fixie. Klein Reve (for sale, http://www.theveer.net/gordons_klein)
Walk upside down?
When walking the back wheel to tighten the chain, is it o.k./helpful to turn the bike upside down? This is obviously a Bad Idea with a geared bike, but horizontal dropouts + no shift levers would seem to make inverting harmless, and make it easier to see and handle the wheel and nuts.
Jamis Sputnik, Lemond Poprad. Retired: Centurion LeMans Fixed, Diamond Back ascent ex
I've read some condesending online critisisms of turning the bike upside down to work on it, but that is what I do, especially roadside. Sure one can learn to do some stuff keeping it upright or on its side and some stuff is better to do upright. edit: it was in the r.b. FAQ: http://draco.acs.uci.edu/rbfaq/FAQ/8a.5.html
In my garage I have a carpet I turn bike upside down on.
I'm not so stupid as to turn it over on a computer or other damagable part or on nasty surface.
most modern hydro disk brakes are closed resivoir so unless you're actually pumping the brakes while the bike is upside down, you ain't introducing air into the system. I've been a mech off and on for close to a decade now and have used stands to work on my bikes, the decade before that I just flipped my bike on the saddle to spin the wheels. No problems.