On Tue, 8 Dec 2015 01:39:36 -0000 (UTC), "Danny D."
wrote:

clare wrote, on Mon, 07 Dec 2015 18:38:42 -0500:

A 12 volt compressor or a good manual tire pump is a
lot better than canned air

Probably true.

1. The advantage of canned air is that sealant is often included,
and it doesn't require electricity and it's small but it
goes bad over time.

2. The advantage of a compressor is that it doesn't go bad over
time but it's much larger and it requires electricity (which
is usually ok except the cigarette lighter is FAR away from
the rear tires if you keep the wheels on the car). On a bimmer,
the battery is far from the front axle. On most cars, it's
the opposite, but you still have that problem.

Some do go bad just sitting. Hoses rot, and compressor pistons corrode
from misuse.

3. The advantage of a hose that goes from one side of one axle
to the other side of the other axle is that it's small, it
never goes bad, but it does suck some air out of the other
three tires. If you're lucky, you can suck air out of someone
else's tires!

Don't bet on them not going bad. Ozone damage to the hose can leave
you with a popped hose.

The main disadvantage is that you have to make it out of
a hose and two chucks, one of which has to latch on and
the other has to have some way of shutting off (which most
chucks do). The biggest problem is that the chucks are usually
pretty big, so that necessitates a bigger hose than you want
(or need) to store.

You don't need to make them. They came as standard equipment with many
GM vehicles with air ajustable suspension - to use the air ride
compressor to blow up tires (or footballs, or swimming tubes, or
whatever) I have 2 of them - must be if to 20 feet long each.
My plan is to build a long thin hose, with two hoses on the end
that are thicker which contain the two chucks. Dunno if it would
work though, as I don't know how much air you have to scavenge
from three other tires to fill up one tire.


You would need to take almost 1/3 of the air out of each of 3 other
tires to blow up one empty tire.
Of course, in a parking lot, there are lots of tires ...

And a possible vandalism charge - or more.

A good 1.25 to 2" bore tire pump is just as fast as the 12 volt
compressor - needs no electricity, and doesn't need to steel are from
your other tires. Makes you sweat a bit = but many of us need the
exercise anyway.