Honda 1999 Shadow Aero VT1100C3 Owner's Manual page 127

Tires
We recommend that you visually check
your tires before every ride and use an air
pressure gauge to measure the air pressure
at least once a month or any time you
think the tires might be low. Even tires
that are in good condition may lose one to
two psi per month if not checked and
adjusted regularly.
Always check air pressure when your tires
are "cold" - after the motorcycle has
been parked for at least three hours. If you
check air pressure when your tires are
"warm" - even if your motorcycle has
only been ridden for a few miles - the
readings will be higher. If you let air out
of warm tires to match the recommended
cold pressures, the tires will be
underinflated.
The recommended "cold" tire pressures
are:
Servicing Your Honda
117
front
29 psi (200 kPa ,
2.00 kgf/cm2)
rear
29 psi (200 kPa ,
2.00 kgf/cm2)
with less than 200
Ibs (90 kg) of
added weight'
41 psi (280 kPa ,
2.80 kqf/crn'')
with more than 200
Ibs (90 kg) of
added weight'
"includes the weight of the rider,
passenger, all cargo & all accessories
I