What is PCD in Alloy?

Pitch Circle Diameter (PCD) is the diameter of that circle which passes through the center of all the bolts hole or wheel bolts or wheel rim holes or stud.

What is the most common PCD?

The most common PCD values are 100mm and 114.3mm, the difference arising due to manufacturers using metric or imperial measurements (4.5 inches = 114.3mm). You will need to ensure that your new wheels have the same stud pattern (4 and 5 stud shown above) and same PCD as the wheel hub on your vehicle.

How do you measure PCD for alloy wheels?

The P.C.D. of any wheel or hub with an even number of holes can be measured from the inside of one hole directly across to the outside of the hole opposite. To calculate the P.C.D. of a five stud wheel or hub, measure ‘X’ from the inside of one hole to the outside of the next hole and multiply by 1.7012.

What is a PCD?

Primary ciliary dyskinesia (PCD) is a rare, inherited, long-term condition that children are born with. Children with PCD have a problem with mucus build-up, which leads to swelling of the airways and infections in the airways and the ears. Children with PCD have the condition all their lives.

What is PCD rim?

The Pitch Circle Diameter (PCD) is the diameter of the circle which passes through the centre of all the studs, wheel bolts or wheel rim holes.

Why is PCD important?

A PCD measurement can be used to correctly fit new steel wheels, or alloy replacements. Alloy wheels are particularly recommended for their lighter weight and stylish look. Fitting alloy wheels to the right PCD is essential to making the right conversion.

How does a PCD work?

The Pitch Circle Diameter (PCD) is the diameter of the circle that passes through the centre of all the studs, wheel bolts or wheel rim holes. The easiest way to calculate the PCD is as follows: Identify the size of the rim or tyre size. (This helps to narrow down the likely PCD sizes)

How are alloy wheels measured?

The measurement is from the centre of one bolt hole to the one opposite. For a wheel that utilises an odd number of bolts, a specialist tool determines the most accurate measurement. 4 is the number of bolt holes, and 100 is the diameter of the PCD in mm.

Is PCD the same as bolt pattern?

Definition & Description. The bolt pattern of a wheel is the layout of the mounting holes. A wheel’s bolt pattern can also be called its “Bolt Circle” or “Pitch Circle Diameter (PCD)”. Bolt pattern is expressed as the number of lugs by the diameter of the imaginary circle formed by the center of the lugs.

Can you change the PCD on a car?

There is no way of canging a car’s PCD. Unless you want to ruin it! You’re right, the way to do it is by using an adapter…it is also a spacer. spacers as such are common.