Posted by OTM Mike Stone (Idaho, USA) on Thursday, March 03, 2005 at 5:50PM :
In Reply to: W500 Tire Size ? posted by John on Wednesday, March 02, 2005 at 2:36PM :
if you have dual wheels then you will have to
use the original tire size your wheel will have the size stamped on both pieces that will also determine the tire size
more than likely the OE size is 8.25x20
the dual spacing measurement is critical and
is listed in most tech books - and is measured from center line (of the tread) of one dual to the center line (of the tread) of the other dual
this is called the MINIMUM dual spacing
all real truck tire stores will have a book that lists the measurements
you will need to know the rim width and the tire size
bottom line
people dink with changes on cars/light trucks
you do not dink with real truck tire sizing
one can usually not go wrong using michelin radials unless the vehicle will not be driven very much as the lifespan is about 6years
from date of mfgr
OTM