What Cars Use a 4x108 Bolt Pattern?

What 4x108 Means, and Why a Vehicle List Is Not Enough

4x108 means four lug holes spaced evenly around a circle 108 millimeters in diameter. The pattern is used by Ford, Mercury, Peugeot, Citroen, Audi, Saab, Volvo, Alfa Romeo and early Porsche 924. But 4x108 spans two vehicle families that share a pitch circle diameter and share almost nothing else. American 4x108 cars run studs and a 63.4 mm hub bore. European 4x108 cars run bolts and hub bores as small as 57.1 mm. A wheel that fits one will not necessarily mount on the other, even though both are correctly labeled 4x108.

I am Dennis Feldman, and confirming fitment is the part of this job I do most. The 4x108 pattern generates more phone calls than its share of the market would suggest, and the reason is always the same. Somebody found a wheel listed as 4x108, confirmed their car is 4x108, ordered it, and then discovered the wheel will not seat on the hub or the fasteners are the wrong species entirely.

A vehicle list answers a question nobody actually has. The real question is whether a specific wheel will mount on a specific car, and that takes four numbers, not one.

Specification	What It Controls	What Happens If It Is Wrong
Pitch circle diameter	Whether the fasteners line up with the holes at all	On a four-lug pattern, the wheel simply will not go on
Hub bore	Whether the wheel centers on the hub or hangs on the fasteners	Too small and it will not seat; too large without rings and it vibrates
Fastener type	Studs with nuts, or bolts threaded into the hub	Wrong hardware entirely; nothing to thread onto or into
Thread size and seat type	Clamp load at the joint	Fasteners loosen in service even when torqued correctly

Bolt pattern gets all the attention because it is the number in the product title. The other three decide whether the wheel actually works. Our broader guide to wheel bolt patterns covers how the whole system fits together.

What Is 4x108 in Inches?

4x108 in inches is 4x4.25. Divide 108 by 25.4 and you get 4.2519 inches, which the industry rounds to 4.25. Run it the other way and 4.25 inches is 107.95 millimeters, which rounds to 108.

They are the same pattern written in two unit systems. If a listing says 4x4.25 and your car is 4x108, that is a match, not a near miss. American manufacturers and vintage wheel makers tend to write it in inches. European manufacturers and most modern aftermarket brands write it in millimeters.

The half-millimeter of rounding is not a fitment concern. Lug holes carry more clearance than that by design, and both figures describe the same tooling.

What Cars Use a 4x108 Bolt Pattern?

Here is the list, organized the way it actually matters, which is by which family of car you are dealing with rather than alphabetically by make.

Ford and Mercury, North America

Vehicle	Years	Notes
Ford Mustang, Fox body	1979 to 1993	Four-cylinder and V6 cars. The 5.0 five-lug cars are a different pattern
Ford Thunderbird	1980 to 1988	Fox chassis variants
Ford Pinto	1971 to 1980	Original four-lug fitment
Ford Escort ZX2	1998 to 2003	ZX2 coupe specifically
Ford Contour and Contour SVT	1995 to 2000	Shares the Mondeo platform
Ford Focus	1998 to 2011	Verify by generation and market; later Focus moved to five lug
Ford Fiesta and Fiesta ST	2011 to 2019	The modern enthusiast entry point to this pattern
Mercury Cougar	Fox era	Shares Fox chassis hardware with the Mustang
Mercury Tracer and Mystique	Late 1990s	Mystique is the Contour twin

European makes

Make	Models	Notes
Peugeot	205, 206, 207, 208, 2008, 306, 307	The largest single block of 4x108 vehicles worldwide
Citroen	C3, C4, Saxo, BX, ZX	Shares hardware with Peugeot
Audi	80 and 90 (1987 to 1996), 100, Coupe	Earlier 80 and 90 cars used 4x100; check the year carefully
Saab	Classic 900, 9000	Classic 900 only, not the GM-era cars
Volvo	440, 460, 480	The Dutch-built front-drive cars
Alfa Romeo	Spider (1986 to 1991), Giulia and GT Junior	Vintage models only
Porsche	924, early non-turbo	The four-lug 924 only; Turbo and later cars differ

Two cautions on any list of this kind, including this one. First, manufacturers change bolt patterns mid-generation and by market, and the Audi 80 is the textbook case, having run 4x100 before switching to 4x108. Second, a model appearing on the list does not mean every trim of that model qualifies. The Fox body Mustang is the clearest example: the four-cylinder and V6 cars are 4x108, and the 5.0 cars are not.

Measure your own hub before you buy. Every time.

The Split That Catches People: American vs European 4x108

This is the part almost nobody puts in front of you, and it is the reason those phone calls happen.

The pitch circle diameter is identical across every car above. What is not identical is everything else at the wheel joint.

Specification	Ford and Mercury	Audi	Peugeot, Citroen, Saab
Hub bore	63.4 mm typical	57.1 mm	65.1 mm typical
Fastener type	Studs pressed into the hub, nuts thread on	Bolts thread into the hub	Bolts thread into the hub
Thread	12x1.5 or 1/2 inch right hand	14x1.5	12x1.25 or 12x1.5 depending on model
Practical consequence	Wheel hangs on studs during install	Bolt length must match wheel thickness exactly	Bolt length must match wheel thickness exactly

Three different hub bores and two different fastener systems, all under one bolt pattern label. A Fox body Mustang wheel with a 63.4 mm bore physically cannot seat on an Audi 80 hub if that hub is larger than the bore, and you cannot ring your way out of a bore that is too small. Rings only work in one direction, taking a large bore down to a small hub, never the reverse.

The bolt versus stud difference is the one that surprises people the most. On a stud car you can hang the wheel on the studs and thread nuts on with both hands free. On a bolt car you are holding the wheel up with one hand and starting a bolt with the other, and if that bolt is the wrong length you either bottom it out in the hub before it clamps or you run out of thread engagement. Bolt length is a function of wheel mounting pad thickness, so changing wheels on a European 4x108 car often means changing bolts too.

Seat type matters just as much. Conical, ball and flat seats are not interchangeable, and a mismatch loosens in service even when you torque it correctly on day one. Our guide to lug nut seat types covers how to identify what you have.

On hub bore, the aftermarket almost always ships a wheel with an oversized bore, commonly around 73.1 mm, and expects you to fit hub-centric rings to bring it down to your hub. That is standard practice and it is correct, not a compromise. Skipping the rings is the most common cause of a vibration that no amount of rebalancing will resolve. We covered the mechanism in hub-centric vs lug-centric wheels.

Can I Put 4x108 on 4x100?

Not directly. The two patterns differ by 8 millimeters of pitch circle diameter, which puts every stud 4 millimeters off center from its hole. A lug hole carries roughly a millimeter of working clearance around the fastener. Four millimeters is not close.

What that means practically: the wheel will not go on. This is not a case where it bolts up loose and you find out later. With a four-lug pattern the mismatch is geometric and immediate. You will get one or two fasteners started and the other two will be sitting on metal.

People ask about two workarounds and they deserve honest answers.

Bolt-on adapters. These are real, they work, and they convert 4x100 hubs to 4x108 wheels or the reverse. The catch is that an adapter is a structural component carrying your entire corner load through a second bolted joint, and it adds its own thickness to your effective offset, typically 20 millimeters or more. On a four-lug car you have fewer fasteners sharing that load than on a five-lug, and four-lug cars tend to be light vehicles with small hubs that were not designed with margin for this. If you go this route, use hub-centric adapters from a known manufacturer, torque to spec, and re-torque after the first 50 to 100 miles. Our guide to wheel spacers and adapters lays out the tradeoffs in full.

Eccentric or wobble bolts. These use an offset collar to let a bolt pull a wheel onto a slightly different pitch circle. They are common in parts of Europe for exactly the 4x100 to 4x108 conversion. They also concentrate load in a way a standard bolt does not, and they are not something I would put on a car I intended to drive hard. If you use them, understand you are outside what the wheel and hub manufacturers designed for.

If you want to run 4x108 wheels and you have a 4x100 car, the clean answer is redrilled hubs or a different set of wheels. If you are shopping the other pattern, our guide to 4x100 wheels covers what fits there.

Can You Fit 4x108 on 4x114.3?

No, and the gap is smaller here, which is exactly what makes it dangerous.

4x114.3 and 4x108 differ by 6.3 millimeters of pitch circle diameter, or about 3.15 millimeters at each stud. That is still well beyond the clearance in a lug hole, so the wheel will not mount properly. But 6.3 millimeters is close enough that the two patterns look similar when you eyeball them, and close enough that someone with a set of wheels and some optimism will try to force it.

Here is the mechanism that matters, and it applies to every near-miss bolt pattern. A lug nut does not hold a wheel on by gripping the stud. It holds the wheel on by generating clamp load, pressing the wheel's mounting pad flat against the hub face with enough force that friction carries the driving and braking torque. That clamp load depends on the tapered seat of the nut making full, concentric contact with the tapered seat in the wheel.

Force a wheel onto the wrong pitch circle and the nut contacts its seat on one side only. Clamp load collapses. The joint starts to work back and forth under load, the seats gall, and the fasteners walk loose. On a four-lug car this is worse than on a five-lug, because you have twenty-five percent fewer fasteners carrying the same load and no redundancy when one starts to go.

4x114.3 is a legitimate and widely supported pattern in its own right. If that is what your car actually has, our 4x114.3 bolt pattern guide is the right place to look.

Is 5x4.5 the Same as 5x108?

No. These are two different patterns and the confusion is understandable, because both involve the number 108 somewhere in the conversation.

Written As	In Millimeters	In Inches	Same Pattern?
5x4.5	114.3 mm	4.5 in	Same as 5x114.3
5x108	108 mm	4.25 in	Same as 5x4.25

So 5x4.5 equals 5x114.3, and 5x108 equals 5x4.25. They are 6.3 millimeters apart and they do not interchange. The inch figure to watch for is 4.25, not 4.5.

Where this trips people is that 5x108 and 4x108 share a pitch circle diameter but not a lug count, so a 4x108 wheel and a 5x108 wheel have nothing to do with each other. And 5x114.3 sits close enough to 5x108 that people who successfully forced something once will tell you it works. It does not. If you are working with five-lug patterns, our guide to the 5x108 bolt pattern covers what interchanges there and what does not.

What Wheels Actually Exist in 4x108

This is the practical constraint on a 4x108 build, and it is worth knowing before you fall in love with a wheel design.

The available sizes cluster tightly. Fifteen and seventeen inch diameters dominate, with 15x7 and 17x8 the two most common combinations, followed by 17x7.5 and 15x8. Fourteen and sixteen inch wheels exist in smaller numbers. Beyond eighteen inches the pattern essentially disappears, which makes sense given the vehicles that use it. Offsets run from roughly negative 32 up to positive 48, with most sitting around positive 35.

The brand mix mirrors the vehicle split almost perfectly. On one side you have vintage steel and classic reproduction wheels aimed at Fox body and older American cars. On the other you have European and rally-influenced designs aimed at the Peugeot, Fiesta and Focus crowd. There is not much overlap in the middle, so decide which aesthetic you are chasing before you start browsing.

One constraint deserves special attention. Across the five-lug world, dual-drilled wheels are common, giving you two patterns in one wheel and a fallback if your first choice is unavailable. In 4x108, that fallback effectively does not exist. Four-lug wheels are drilled for one pattern and one pattern only, because there is no room to place two sets of four holes without compromising the mounting pad. So when you find a 4x108 wheel in the size and offset you want, that is the wheel. There is no adjacent pattern to shop as a substitute.

Offset deserves a hard look on these cars too. The vehicles running 4x108 are mostly small and mostly front-drive, which means limited room between the strut and the fender, and a wheel that clears on one 4x108 car may foul on another.

How to Confirm What You Have

A four-lug pattern is the easiest of all to measure, because opposite holes sit directly across from each other.

1. Measure center to center across the diagonal. Pick two holes directly opposite each other and measure from the center of one to the center of the other. That distance is your pitch circle diameter. If it reads 108 millimeters or 4.25 inches, you have 4x108.
2. Check against the near neighbors. 4x100 will read 100 mm or 3.94 in. 4x114.3 will read 114.3 mm or 4.5 in. Those are the two you are ruling out.
3. Measure the hub bore. Caliper the outside diameter of the centering flange on the hub. Expect roughly 63.4 mm on Ford, 57.1 mm on Audi, 65.1 mm on most other European applications.
4. Identify your fasteners. Studs sticking out of the hub means you buy lug nuts. A threaded hole in the hub means you buy bolts, and you need the right length for your new wheel's mounting pad thickness.
5. Identify the seat type. Look at the taper on your existing nuts or bolts. Conical, ball and flat seats each require matching hardware.
6. Order rings if the wheel bore is larger than your hub. It usually will be. Rings are inexpensive and not optional.
7. Torque to spec and re-torque. Most 4x108 applications call for 75 to 85 lb-ft in a crossing sequence. Re-check after 50 to 100 miles of driving.

If the numbers are borderline or the wheel is unmarked, take it to a shop with a proper bolt pattern gauge. Guessing on a four-lug car has less margin than guessing on a five-lug.

Conclusion

4x108 is a real and well-supported bolt pattern with a long list of vehicles behind it, from Fox body Mustangs to Peugeot 205s to the Fiesta ST. The list itself is the easy part, and you can find it anywhere.

The part worth carrying away is that 4x108 describes one measurement out of four that have to be right. Hub bore varies from 57.1 to 65.1 millimeters across the vehicles that use this pattern. Fastener type splits cleanly along the Atlantic, with American cars on studs and European cars on bolts. Neither of those appears in the wheel listing, and neither will be caught by matching the bolt pattern alone.

And unlike the five-lug world, there is no dual-drilled fallback here. Get the four numbers right the first time and 4x108 is straightforward. Get one wrong and there is no adjacent pattern to fall back on.

When you are ready to see what is available, browse the full 4x108 bolt pattern wheel selection.

Key Takeaways

• 4x108 means four lug holes on a 108 millimeter circle. In inches it is 4x4.25, and the two are the same pattern.
• Ford, Mercury, Peugeot, Citroen, Audi, Saab, Volvo, Alfa Romeo and the early four-lug Porsche 924 all use it.
• Hub bore varies across the pattern: roughly 63.4 mm on Ford, 57.1 mm on Audi, 65.1 mm on most other European applications.
• American 4x108 cars use studs and lug nuts. European 4x108 cars use bolts that thread into the hub, and bolt length must match the wheel.
• 4x108 does not fit a 4x100 or 4x114.3 hub. The wheel will not mount, and forcing a near-miss pattern collapses clamp load at the seat.
• 5x4.5 is 5x114.3, not 5x108. The inch equivalent of 5x108 is 5x4.25.
• Four-lug wheels are almost never dual-drilled, so there is no second pattern to fall back on if your size is unavailable.

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