Don’t always rely on the manufacturer’s advertised measurements; you’ll want to measure it yourself to get the most accurate measurements for the proper size truck rim.
You will need:
- Tape measure
- Paper and pencil to write the measurements down
Step 1. Diameter
Measure from the inside to inside of the bead seat. Do not measure from outer edge to outer edge. This is your diameter.
Step 2. Width
Measure from the inside of the rim bead flange to the opposite bead flange. This is your width.
Step 3. Offset
Offset is the distance between the rim centerline to the actual flat mounting surface where the rim comes contact with the hub.
Step 4. Backspacing
Set a straight edge level across the backside of the rim. Measure from the inside flat mounting surface to the outer lip of your wheels (to the straight edge). This is your backspace measurement.