2017 Mercedes-Benz C43 AMG 4Matic Cabriolet Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Mercedes-Benz C43 AMG 4Matic Cabriolet wheels? This page gives the 2017 Mercedes-Benz C43 AMG 4Matic Cabriolet bolt pattern (5x112), centre bore, factory rim size and the offset range for aftermarket and forged Mercedes-Benz C43 AMG 4Matic Cabriolet rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2017 Mercedes-Benz C43 AMG 4Matic Cabriolet uses a 5x112 bolt pattern with a 66.6 mm centre bore and M14x1.5 lug bolts. Factory wheels: F: 18x7.5J R: 18x8.5J. For aftermarket wheels, 19x8.5J ET32 front / 19x9.5J ET38 rear sits flush and 20x9.0J ET28 front / 20x10.0J ET32 rear is the most aggressive fit.
Forged wheels for the 2017 Mercedes-Benz C43 AMG 4Matic Cabriolet — drilled 5x112 with a 66.6 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Mercedes-Benz C43 AMG 4Matic Cabriolet (2017): 5x112 bolt pattern, 66.6mm center bore. Factory wheels: F: 18x7.5J R: 18x8.5J. Reference fitment ranges.
Bolt Pattern5x112
Wheel Bolt/NutM14x1.5 Bolt
Center Bore66.6mm
Wheel Load Rating700–850 kg/wheel (Performance / Sports Car segment reference)
Caliper TypeBrembo 4-piston fixed front / 2-piston floating rear (OEM, AMG)
Year2017
CategoryPerformance Convertible
✓ Data check: the bolt pattern and center bore on this page match an independent fitment reference. Last reviewed September 18, 2026. How we verify
Wheel Size & Offset at a Glance
| Configuration | Wheel Size & Offset |
|---|---|
| Factory (OE) | F: 18x7.5J R: 18x8.5J |
| Flush Fitment | F 19x8.5J ET32 / R 19x9.5J ET38 |
| Maximum Aggressive | F 20x9.0J ET28 / R 20x10.0J ET32 |
Forged Wheel Designs for the Mercedes-Benz C43 AMG 4Matic Cabriolet
Every design below is forged to order, so it can be machined to the Mercedes-Benz C43 AMG 4Matic Cabriolet's 5x112 bolt pattern and 66.6 mm center bore, with the width and offset calculated for your setup.
Rays-Style Gloss Black 10-Spoke Polished Lip Forged Wheels
Monoblock · Gloss Black
AMG-Style Gold 10-Spoke Forged Wheels
Monoblock · Gold
Pink / Silver Heart Petal Forged Wheels
Monoblock · Pink / Silver
Gold 7 Y-Spoke Forged Wheels
Monoblock · Gold
Vossen-Style Polished Aero Disc Forged Wheels
Monoblock · Polished
Mercedes-Benz OEM-Style Silver / Black 10 Split-Spoke Forged Wheels
Monoblock · Silver / Black
Matte Black 10 Y-Spoke Riveted Forged Wheels
Monoblock · Matte Black
How to Read Wheel Offset & Measurements
Use these two references before ordering: the left diagram shows where each spec (PCD, center bore, offset, width and diameter) is measured on the wheel; the right diagram shows how positive, zero and negative offset shift the wheel face relative to the hub centerline.
ANKUSI Engineering Expert Advice
Convertibles lose some of the structural rigidity a fixed roof provides, which means the suspension and wheels end up doing more of the work to keep the chassis composed. A forged wheel keeps unsprung mass down without sacrificing the strength margin the factory built in — useful on a platform that's already managing extra flex.
The Mercedes-Benz C43 AMG 4Matic Cabriolet runs a 5x112 bolt pattern, 66.6mm center bore, and a F: 18x7.5J wheel from the factory. Our Flush Fitment reference is F 19x8.5J ET32 / R 19x9.5J ET38, which tucks the tire under the fender lip on a stock-height Mercedes-Benz C43 AMG 4Matic Cabriolet. Our Maximum Aggressive reference is F 20x9.0J ET28 / R 20x10.0J ET32 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Mercedes-Benz C43 AMG 4Matic Cabriolet OE Wheel Specs
The 2017 Mercedes-Benz C43 AMG 4Matic Cabriolet (Performance Convertible) uses a 5x112 bolt pattern with a 66.6mm center bore. Factory wheels are F: 18x7.5J R: 18x8.5J.
Why the factory spec works for most owners:
- Matches the chassis tuning used to help offset reduced structural rigidity
- Balances ride comfort with the sportier character typical of this body style
- Keeps unsprung weight low for stable handling
- Maintains clearance for the factory brake package and suspension components
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Mercedes-Benz C43 AMG 4Matic Cabriolet (2017) we drill the 5x112 pattern and cut the centre bore to 66.6mm on our own CNC line, so the wheel hub-centres on the car with no spacer rings, in whatever diameter, width and offset you specify.
Converting these ET figures to backspacing? Use the wheel offset and backspacing calculator.
The figures on this page are part of our open wheel fitment dataset — 10,093 vehicles, free to download, CC BY 4.0.
Offset & Backspacing Reference
Backspacing is calculated as wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance):
- OE: F 18x7.5J ET38 → ~5.75″ F backspacing, R 18x8.5J ET38 → ~6.25″ R backspacing
- Flush: F 19x8.5J ET32 → ~6.01″ F backspacing, R 19x9.5J ET38 → ~6.75″ R backspacing
- Max: F 20x9.0J ET28 → ~6.1″ F backspacing, R 20x10.0J ET32 → ~6.76″ R backspacing
Want to check a different width or offset before you order? Use our Offset & Backspacing Calculator to solve the numbers yourself, or looking for your exact Mercedes-Benz spec, or want a wheel built to a custom offset for your Mercedes-Benz C43 AMG 4Matic Cabriolet? Contact ANKUSI with your bolt pattern and offset target and we will confirm the correct forged wheel spec for your build.
Vehicles With the Same Hub as the Mercedes-Benz C43 AMG 4Matic Cabriolet (5x112, 66.6 mm Bore)
In our database, 823 other vehicle entries from 21 makes use exactly the same 5x112 bolt pattern and 66.6 mm center bore. Factory wheels from these cars bolt on and center on the hub without rings; offset and width still have to be checked.
5x112 is used by 21.6% of the vehicle pages in our English fitment guide (1,407 of 6,503); 58.6% of those also use a 66.6 mm center bore.
Hub-Centric Rings for a 66.6 mm Center Bore
A wheel with a center bore larger than 66.6 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 67.1 mm | 67.1 → 66.6 mm |
| 70.1 mm | 70.1 → 66.6 mm |
| 70.5 mm | 70.5 → 66.6 mm |
| 71.6 mm | 71.6 → 66.6 mm |
| 73.1 mm | 73.1 → 66.6 mm |
ANKUSI forged wheels are bored to exactly 66.6 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Mercedes-Benz C43 AMG 4Matic Cabriolet use?
The 2017 Mercedes-Benz C43 AMG 4Matic Cabriolet uses a 5x112 bolt pattern.
How many lug bolts does the Mercedes-Benz C43 AMG 4Matic Cabriolet use?
The Mercedes-Benz C43 AMG 4Matic Cabriolet uses a 5-lug bolt pattern (5x112), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the Mercedes-Benz C43 AMG 4Matic Cabriolet?
The Mercedes-Benz C43 AMG 4Matic Cabriolet's center bore is 66.6mm. If an aftermarket wheel has a larger center bore than this, hub-centric rings are recommended so the wheel centers on the hub itself rather than relying on the lug bolts alone.
What size are the factory (stock) wheels on the Mercedes-Benz C43 AMG 4Matic Cabriolet?
Factory wheels on the Mercedes-Benz C43 AMG 4Matic Cabriolet are F: 18x7.5J R: 18x8.5J.
What is the biggest wheel size I can fit on my Mercedes-Benz C43 AMG 4Matic Cabriolet without rubbing?
The most aggressive fitment we recommend without fender work is F 20x9.0J ET28 / R 20x10.0J ET32. Going beyond this typically causes rubbing under compression unless you roll the fenders or add camber correction.
What does a flush wheel fitment look like on the Mercedes-Benz C43 AMG 4Matic Cabriolet?
For a flush look with minimal to no rubbing, we recommend F 19x8.5J ET32 / R 19x9.5J ET38 as a starting point on a stock or mildly lowered Mercedes-Benz C43 AMG 4Matic Cabriolet.
Do I need wheel spacers for my Mercedes-Benz C43 AMG 4Matic Cabriolet?
No. ANKUSI forges each wheel to your exact target offset, including the flush or max specs above, so you get the correct fitment without stacking spacers. Spacers are typically only used to push out an existing OE-offset wheel without replacing it, which isn't necessary when you're ordering a custom-offset forged wheel.
How do I calculate wheel backspacing for my Mercedes-Benz C43 AMG 4Matic Cabriolet?
Backspacing (in inches) = wheel width (in) ÷ 2 + offset (mm) ÷ 25.4 + 0.5 (flange allowance). For example, the flush spec above works out to roughly 6.01" backspacing up front and 6.75" in the rear.
What's the difference between wheel offset and backspacing?
Offset is the distance in millimeters from the wheel's true centerline to its mounting face (positive offset pulls the wheel in, negative pushes it out). Backspacing is the distance in inches from the mounting face to the back edge of the wheel barrel. They describe the same fitment from two different reference points, which is why ANKUSI lists both above — some shops and tuning guides quote offset, others quote backspacing.
Can I run staggered wheels (different sizes front and rear) on my Mercedes-Benz C43 AMG 4Matic Cabriolet?
Yes — the Mercedes-Benz C43 AMG 4Matic Cabriolet's factory and our recommended flush/max fitments already use staggered sizing (different width front and rear), and ANKUSI can forge matching staggered sets to your target offsets.
Wheel Installation Reference: Torque, Thread & TPMS
Thread & Fastener: M14x1.5, ball-seat lug bolt.
Factory Torque Spec: 130 Nm (96 ft-lb). Sedan/coupe platforms (E-Class, CLS, SL and similar) generally use the shorter 27mm bolt at this spec.
TPMS: TPMS (Tire Pressure Monitoring System) has been federally mandated on all new light vehicles sold in the US since the 2008 model year. If your wheels use OE-style sensors, have them transferred or cloned to the new wheels at installation.
Tire Pressure: Always set tire pressure to the value on your vehicle's tire placard (driver's doorjamb or glovebox), not the max PSI printed on the tire sidewall — this is trim- and tire-size-specific and stays the same reference point when you switch to a different wheel and tire combination.
Reference data compiled from published OEM service specifications and cross-checked against independent repair sources; always confirm against your owner's manual or door-jamb placard before installation.
Sources and Last Update
Data checked against: avtoreference.com.
This record is part of the open ANKUSI Wheel Fitment Dataset (DOI 10.5281/zenodo.23241521, CC BY 4.0).
Other cars on the same factory size: 18x7.5 wheels · 18 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.