ホイールPCD（ボルトパターン）の測り方
4穴・6穴は向かい合うボルトの中心間を測ります。5穴はボルトの穴の端から対向するボルトの中心を測ります。
⚡ホイールPCD（ボルトパターン）の測り方 Calculator
Live InteractiveホイールPCD（ボルトパターン）の測り方 — Step-by-Step Reference
愛車のホイールPCDを測る方法。4穴・5穴・6穴の測り方の違いと計算ゲージ。
US Imperial Standard
Standard fractions divided into 1/16", 1/8", 1/4", and 1/2" increments with exact decimal benchmarks.
Metric SI Equivalence
Millimeter and centimeter precision calculated using exact 25.40 mm per international inch conversion.
ホイールPCD（ボルトパターン）の測り方 FAQ
How do I measure a wheel bolt pattern?
A bolt pattern has two numbers: the lug count and the circle diameter that passes through the lug hole centers, such as 5x114.3 mm (5x4.5 inches). Count the lugs first, then measure the circle with the method for your lug count.
How do I measure a 5-lug bolt pattern?
Five lugs have no opposite pair, so use the center-to-edge method shown above. You can also measure center to center between two neighboring lug holes and multiply by 1.7013 to get the pattern diameter.
How do I measure a 4-lug, 6-lug or 8-lug bolt pattern?
Measure from the center of one lug hole straight across to the center of the opposite lug hole. That distance is the bolt pattern diameter.
How do I measure a trailer wheel bolt pattern?
Use the same methods as for car wheels. Common trailer patterns include 5x4.5 inches, 5x5 inches, 6x5.5 inches and 8x6.5 inches.
Is 5x4.5 the same as 5x114.3?
Yes. 4.5 inches multiplied by 25.4 equals 114.3 mm. In the same way, 4x100 means 4 lugs on a 100 mm circle.
Does the bolt pattern alone tell me if a wheel will fit?
No. Also check center bore, offset, lug seat type and thread size before buying wheels.