What is PCD (pitch circle diameter)?

PCD (Pitch Circle Diameter) is the diameter of an imaginary circle drawn through the center of all bolt holes. It's the standard way to describe bolt patterns. Expressed as 'number of bolts × PCD' — e.g., 5×114.3mm means 5 bolts on a 114.3mm diameter circle. PCD must match exactly between wheel and hub for proper fitment. Even 1mm difference means the wheel won't mount correctly.

Can I use wheel adapters to change bolt patterns?

Yes, but with caution. Hub-centric wheel adapters (bolt-on spacers that change the bolt pattern) are available and work safely if: they're hub-centric (not lug-centric), made from forged billet aluminum (not cast), properly torqued, and from a reputable manufacturer. They add the adapter thickness to your wheel offset, pushing wheels outward. Never use stacked adapters. Many race sanctioning bodies and some countries prohibit adapters. Check local laws and your insurance policy.

What other measurements matter for wheel fitment?

Beyond bolt pattern: Center bore (hub bore) — must match or be larger than hub diameter (use hub-centric rings if larger). Offset (ET) — distance from hub mounting surface to wheel centerline (wrong offset causes rubbing or excess stress). Width — affects tire clearance. Diameter — must match tire size. Lug nut type — conical seat, ball seat, or flat seat must match the wheel. All five measurements must be correct for safe wheel fitment.

How do I convert bolt pattern from mm to inches?

Divide mm by 25.4 to get inches. Common conversions: 100mm = 3.94", 108mm = 4.25", 110mm = 4.33", 112mm = 4.41", 114.3mm = 4.5", 115mm = 4.53", 120mm = 4.72", 127mm = 5", 130mm = 5.12", 139.7mm = 5.5", 150mm = 5.91", 165.1mm = 6.5", 170mm = 6.69", 180mm = 7.09". The calculator converts both directions automatically.

Bolt Pattern Calculator — Free PCD, Wheel Fitment & Lug Pattern Converter 2026 | AllInOneTools

🔧 Automotive

Bolt Pattern Calculator

Calculate PCD (pitch circle diameter) from bolt measurements, convert between mm and inches, and check wheel fitment compatibility for any vehicle.

Measure Between Adjacent Bolts

Number of Bolts

Distance Between Adjacent Bolt Centers

Or Enter PCD Directly

Known PCD

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Bolt Pattern Details

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Compatible Vehicles (common)

📝 Calculation Steps

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Bolt Pattern Calculator: The Complete Guide to PCD, Measurement, and Wheel Fitment

The bolt pattern (also called lug pattern or PCD) is one of the most critical measurements for wheel fitment. If the bolt pattern doesn't match, the wheel simply won't mount on your vehicle — or worse, it'll mount incorrectly and create a serious safety hazard. This guide explains how to measure, calculate, and verify bolt patterns for any vehicle.

The PCD Formula

PCD from adjacent bolt measurement:
PCD = Adjacent Distance ÷ sin(180° ÷ Number of Bolts)

4-lug: PCD = Adjacent × 1.4142 (÷ sin 45°)
5-lug: PCD = Adjacent × 1.7013 (÷ sin 36°)
6-lug: PCD = Adjacent × 2.0000 (÷ sin 30°)
8-lug: PCD = Adjacent × 2.6131 (÷ sin 22.5°)

Conversion: mm ÷ 25.4 = inches | inches × 25.4 = mm

Worked Example — 5-Lug Pattern

Measured distance between adjacent bolt centers: 67.26 mm
PCD = 67.26 ÷ sin(180° ÷ 5)
PCD = 67.26 ÷ sin(36°)
PCD = 67.26 ÷ 0.5878
PCD = 114.38 mm ≈ 114.3 mm
Pattern: 5×114.3 mm (5×4.5")
Compatible: Toyota Camry, Honda Civic, Hyundai, Nissan, and many more

Common Bolt Patterns Reference

Pattern	Metric	Imperial	Vehicles
4×100	4×100mm	4×3.94"	Honda Fit, Mazda Miata, VW Polo, Mini
5×100	5×100mm	5×3.94"	Subaru (older), VW Golf/Jetta, Toyota 86
5×112	5×112mm	5×4.41"	VW, Audi, Mercedes (newer), Porsche
5×114.3	5×114.3mm	5×4.5"	Toyota, Honda, Nissan, Hyundai, Ford
5×120	5×120mm	5×4.72"	BMW, Tesla Model 3, Honda Pilot
6×139.7	6×139.7mm	6×5.5"	Toyota trucks, GM trucks, Nissan trucks
6×135	6×135mm	6×5.31"	Ford F-150 (2004+), Lincoln
8×165.1	8×165.1mm	8×6.5"	GM 2500/3500 HD, Dodge RAM 2500

Pro Tip — Always Check Center Bore

Even if the bolt pattern matches, the center bore (hub bore) must also be compatible. The wheel's center bore must be equal to or larger than the hub diameter. If the wheel bore is larger, use hub-centric rings to fill the gap — this ensures the wheel is centered by the hub, not by the lug nuts. Lug-centric mounting (without rings) puts stress on the studs and can cause vibration at speed.

Critical — Bolt Pattern Must Match Exactly

Never force a wheel onto a mismatched bolt pattern. Even a 1mm PCD difference means bolt holes won't align properly, causing uneven lug nut seating, stud stress, and potential wheel separation at speed. Do not use elongated lug nuts or "wobble bolts" as a permanent solution — these are unsafe for street use. If you want wheels with a different bolt pattern, use proper hub-centric bolt-on adapters from a reputable manufacturer.

Frequently Asked Questions

How do I measure my bolt pattern?▼

Even-lug (4,6,8): measure center-to-center between opposite bolts = PCD. 5-lug: measure between adjacent bolt centers, multiply by 1.7013. Or measure from one bolt center to the far edge of the opposite bolt. Use a caliper for accuracy. Our calculator converts adjacent measurement to PCD automatically.

What is PCD?▼

PCD (Pitch Circle Diameter) = the diameter of the imaginary circle through all bolt hole centers. Written as "bolts × PCD" — e.g., 5×114.3mm. Must match exactly between wheel and hub. It's the universal standard for describing bolt patterns worldwide.

What is the most common bolt pattern?▼

5×114.3mm (5×4.5") — used by Toyota, Honda, Nissan, Hyundai, Kia, Ford, Mazda, and many others. Second most common: 5×112mm (VW/Audi/Mercedes) and 5×120mm (BMW). For trucks: 6×139.7mm (Toyota/GM/Nissan) and 6×135mm (Ford F-150).

Can I use wheel adapters?▼

Yes, if hub-centric, forged billet aluminum, and properly torqued. They add thickness to your offset (pushing wheels outward). Never stack adapters. Check local laws — some jurisdictions and insurance policies restrict them. Buy from reputable manufacturers only.

What other measurements matter for fitment?▼

Center bore (hub bore), offset (ET), width, diameter, and lug nut seat type. All five must be correct for safe fitment. Wrong offset causes rubbing or excess stress. Wrong center bore causes vibration. Wrong lug seat damages wheels.

How do I convert mm to inches?▼

Divide mm by 25.4. Common: 100mm = 3.94", 112mm = 4.41", 114.3mm = 4.5", 120mm = 4.72", 127mm = 5", 139.7mm = 5.5". Our calculator converts both directions automatically.

What bolt pattern does my car have?▼

Check your owner's manual, door jamb sticker, or look up your year/make/model. Common: Honda Civic 5×114.3, VW Golf 5×112, BMW 3-Series 5×120, Ford F-150 6×135, Jeep Wrangler 5×127. Patterns can change between model years — always verify.