Wheel terms
OFFSET
The offset indicates the
distance from the center of the rim to the attaching disk part (unit:m/m). As
seen in the attached drawing, the offset is indicated by "+" when the fitting
surface extends beyond the central line of the rim and "-" when it is falls
within. Caution is required to prevent the tire from coming into contact with
the fender of the vehicle or the brake caliper if the offsets are very
different.
PCD
The number of bolts used to install a wheel varies from 4 to 6 depending on the
vehicle model (except for some vehicle types), thus the wheel to be installed
should also possess the same number of hub bolt holes. P.C.D. stands for pitch
circle diameter, and indicates the diameter of the circle in mm connecting the
center of each hub bolt. Since the P.C.D. also varies according to the vehicle
model, make sure a suitable one is selected.
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