You may not think of
your trailer wheels as being particularly
specialized, but there are actually many specific
measurements that must be just right. The wheel's
size ensures that it flows smoothly with the others
and that the cargo you are carrying on the trailer
has a smooth, safe ride to your destination. When
you're measuring your trailer wheel, you need to pay
attention to several specific dimensions.
is the exact center of the wheel, measured from
front to back. The trailer tire needs to be
balanced around the centerline for proper
is the distance across the trailer wheel at its
longest, measured at the spots where the tire
seals with the wheel.
is the distance across the bolt hole where you
will secure the wheel to the trailer.
is the part of the wheel in the center that
touches the face of the hub on your trailer.
is the side of the wheel that faces your trailer
is the side of the trailer wheel that faces the
backspace is the distance
between the mounting pad and the edge of the
trailer wheel on the drum side.
is the space between the centerline of your
trailer wheel and the mounting pad.
Depending on your
trailer wheel's configuration, the wheel offset may
be zero, positive or negative. It's very important
to understand the difference between these because
they affect how the weight of your trailer is
distributed over your wheels.
Here's a brief
description of each option:
is when the mounting pad is exactly at the wheel
centerline (this is the most common offset with
is when the mounting pad is closer to the street
side than the drum side.
is when the mounting pad is closer to the drum
side than the street side.
Being able to understand
and measure each of these components is very
important. You'll need the information to choose the
proper trailer wheels when it's time to replace