5x5.5 Bolt Pattern: PCD, Meaning & Wheel Fitment
5x5.5 means 5 lug holes arranged on a bolt circle with a diameter of 139.7 mm (about 5.5 inches).
5x5.5 Quick Facts
What Does 5x5.5 Mean?
The first number tells you how many wheel studs or lug holes the pattern uses. The second number is the pitch circle diameter (PCD): the diameter of the imaginary circle that passes through the centers of those studs. On this page, the PCD is written in inches.
5x5.5 in Millimeters
A 5x5.5 pattern has a 5.5-inch PCD, equal to 139.7 mm. The same bolt-circle diameter is also commonly written as 5x139.7.
| Bolt pattern | 5x5.5 |
|---|---|
| Lug count | 5 |
| PCD | 139.7 mm |
| PCD in inches | 5.5 in |
| Equivalent notation | 5x139.7 |
Is 5x5.5 the Same as 5x139.7?
Yes. 5x5.5 and 5x139.7 describe the same bolt-circle diameter using metric and inch units. That does not mean every wheel with this bolt pattern automatically fits every vehicle; the remaining wheel specifications still need to match.
How to Measure the 5x5.5 Bolt Pattern
For a 5-lug pattern, a bolt-circle template or manufacturer specification is the most reliable method. A common field method measures from the center of one stud toward the outer edge of the farthest stud, but verify the final PCD before buying wheels.
Because small measurement errors can lead to the wrong wheel, use the vehicle or wheel manufacturer's specification whenever possible.
Does a Matching 5x5.5 Bolt Pattern Guarantee Wheel Fitment?
No. Bolt pattern is only one part of wheel compatibility. You must also check center bore, wheel diameter, wheel width, offset/backspacing, brake clearance, lug-seat/thread hardware and load capacity before installing a wheel.
Check Your Vehicle Before Choosing Wheels
Use the vehicle fitment finder for vehicle-specific specifications, and use the wheel offset calculator to understand position and clearance changes.
Related 5-Lug Bolt Patterns
5x5.5 FAQ
What does 5x5.5 bolt pattern mean?
It means the wheel uses 5 lug holes on a 139.7 mm pitch circle diameter.
What is 5x5.5 in millimeters?
The PCD is 139.7 mm, equal to 5.5 inches.
Is 5x5.5 the same as 5x139.7?
Yes. They describe the same bolt-circle diameter in different units.
Do all wheels with a 5x5.5 pattern fit?
No. Center bore, offset, width, diameter, brake clearance, lug hardware and load requirements must also be compatible.