What does PCD mean in rim sizes?
Ethan Hayes
Updated on March 21, 2026
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Hereof, how do I know what PCD my rims are?
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.
Secondly, what does PCD 100 mean? 100 is the simplest. So lets say you have an alloy with 4×100 PCD. It means it has four holes and the distance between one bolt hole and the one opposite to it is 100 mm. It simple means the circumference on which all 5 holes are drilled, it has a diameter of 114 mm. Same way 6 bolt wheel PCD is measured.
Similarly, you may ask, how do you find the distance of a hole in PCD?
So, the common formula is,
- Hole to hole distance, H= Sin [(360 o/hole number)/2]*PCD.
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Is the bolt pattern stamped on the rim?
Locate the stamped size on the back of the hub on the rim. This is the assigned measured size of the rim, and it is broken into three sizes: diameter, width and bolt pattern. For example, a 14 by 6 by 4.5 reading on the rim indicates that the diameter of the rim is 14 inches, and it will accommodate most 14-inch tires.
Related Question AnswersWhat does PCD 114 mean?
It means it has four holes and the distance between one bolt hole and the one opposite to it is 100 mm. 5×114 is slightly different. It simple means the circumference on which all 5 holes are drilled, it has a diameter of 114 mm. Same way 6 bolt wheel PCD is measured.What does PCD stand for?
Pitch Circle DiameterWhat is the formula for calculating PCD?
(This helps to narrow down the likely PCD sizes) Measure the distance 'S' between two adjacent studs from the centre of each hole. Using the calculator enter the number of studs/holes & 'S' and press 'calculate'.Pitch Circle Diameter – PCD Calculation Formula.
| 4 Stud PCD = | S |
|---|---|
| 0.7071 | |
| 5 Stud PCD = | S |
| 0.5878 | |
| 6 Stud PCD = | S |