Honda 2005 VTX1800C Owner's Manual page 152

The recommended tires for your
motorcycle are:
VTX1800F
130/70R18M/C 63V
front
DUNLOP D251F
180/55R18M/C 74V
rear
DUNLOP D251
radial-ply, tubeless
type
VTX1800C
front 130/70R18M/C 63H
DUNLOP D251F
rear 180/70R16M/C 77H
DUNLOP D251
type radial-ply, tubeless
Whenever you replace a tire, remember:
Have the wheel balanced after the tire is
installed.
Have the tire replaced by your Honda
dealer if possible.
If you have a tire professionally replaced
at a non-Honda facility, we recommend
that you have the work checked by your
Honda dealer.
Servicing Your Honda
Tires
143