The complete guide to ordering custom wheel lips with accurate fitment.
Relipping a wheel lets you customize its look and fitment by replacing or upgrading the outer lip. To get the right parts, you need precise measurements. This guide explains step by step how to measure your wheel for relipping, ensuring the new lips fit your setup perfectly — both visually and mechanically.
What is the original lip?
The original wheel lip is the section from the weld point (where the outer lip meets the inner barrel) to the outer edge of the lip.
Why it’s important:
This tells you how much lip you already have and gives you a starting point for selecting a wider or deeper lip during relipping.
How to measure:
Use a tape measure to measure from the center of the weld (or joint) to the outer edge of the lip.
Measure in a straight line across the face of the wheel.
Unit of measurement: Inches (preferred) or millimeters
Tip: Convert mm to inches when ordering, as most lips are sized in inches.
What is fender clearance?
This is the space between your current wheel setup and the inner side of your vehicle’s fender.
Why it’s important:
To avoid rubbing or sticking out, you need to know how much extra lip width your car can handle.
How to measure:
Hold a straight edge vertically against your fender.
Extend it downward and measure the gap between the wheel and the inside of the straight edge.
Unit of measurement: Millimeters
What is center space?
Center space is the flat inner area of the outer lip — the section that sits against the edge of the wheel face before the lip curves outward.
Why it’s important:
It determines how the lip sits on the wheel face and affects the final look and depth of your relipped wheels.
How to measure:
Flip the lip or wheel face down on a flat surface.
Use a caliper or tape measure to measure the diameter of the flat center area, right before the curve begins.
Unit of measurement: Millimeters
What is the center bore?
The center bore is the hole in the middle of the outer lip. It fits over the center ring of the wheel face and ensures proper alignment.
Why it’s important:
An incorrect center bore can cause the lip not to fit flush against the wheel face.
How to measure:
Place the lip face-up.
Measure the inside diameter of the center hole using a digital caliper or a precise ruler.
Unit of measurement: Millimeters
What is PCD?
The Pitch Circle Diameter is the diameter of the circle that goes through the center of all bolt holes on the wheel lip.
Why it’s important:
The PCD must match your wheel face bolt pattern to ensure proper mounting of the new lip.
How to measure:
Count the number of bolt holes.
For even-numbered bolt patterns, measure from the center of one hole to the center of the hole directly across.
For odd-numbered patterns, use a PCD gauge or contact us for help.
Unit of measurement: Millimeters
What is the bolt count?
This is the total number of bolts that secure the lip to the wheel face or barrel.
Why it’s important:
Some lips are only made for specific bolt patterns. If your wheel is welded, it must be professionally welded again after relipping.
How to measure:
Count the number of bolts or bolt holes around the outer lip.
Unit of measurement: Quantity (e.g., 20, 30, 40 bolts)
What is bolt hole size?
This is the diameter of each hole that the mounting bolts go through on the wheel lip.
Why it’s important:
Bolt hole size ensures your existing hardware fits properly when installing the new lip.
How to measure:
Use a digital caliper or precision ruler to measure the diameter of one bolt hole.
Unit of measurement: Millimeters
Always double-check your measurements before ordering.
Use digital calipers for maximum accuracy — especially for center bore, PCD, and bolt holes.
If you’re unsure about any step, feel free to contact RollOut for support.
