2023 Mercedes-Benz GLC 300 (US) Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Mercedes-Benz GLC 300 (US) wheels? This page gives the 2023 Mercedes-Benz GLC 300 (US) bolt pattern (5x112), centre bore, factory rim size and the offset range for aftermarket and forged Mercedes-Benz GLC 300 (US) rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2023 Mercedes-Benz GLC 300 (US) uses a 5x112 bolt pattern with a 66.6 mm centre bore and M14x1.5 lug bolts. Factory wheels: F: 18x8.0J R: 18x9.0J. For aftermarket wheels, 19x9.0J ET28 front / 19x10.0J ET35 rear sits flush and 20x9.5J ET25 front / 20x10.5J ET30 rear is the most aggressive fit.
Forged wheels for the 2023 Mercedes-Benz GLC 300 (US) — 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 GLC 300 (US) (2023): 5x112 bolt pattern, 66.6mm center bore. Factory wheels: F: 18x8.0J R: 18x9.0J. Reference fitment ranges.
Bolt Pattern5x112
Wheel Bolt/NutM14x1.5 Bolt
Center Bore66.6mm
Wheel Load Rating800–950 kg/wheel (Crossover segment reference)
Year2023
CategoryCrossover
✓ 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: 18x8.0J R: 18x9.0J |
| Flush Fitment | F 19x9.0J ET28 / R 19x10.0J ET35 |
| Maximum Aggressive | F 20x9.5J ET25 / R 20x10.5J ET30 |
Forged Wheel Designs for the Mercedes-Benz GLC 300 (US)
Every design below is forged to order, so it can be machined to the Mercedes-Benz GLC 300 (US)'s 5x112 bolt pattern and 66.6 mm center bore, with the width and offset calculated for your setup.
Gloss Black Machined Mesh Forged Wheels
Monoblock · Gloss Black / Machined
Mercedes-Benz OEM-Style Gloss Black 10 Y-Split-Spoke Forged Wheels
Monoblock · Matte Black
Mercedes-Benz OEM-Style Gunmetal 5 Split-Spoke Forged Wheels
Monoblock · Gunmetal
Silver / Gloss Black 5 Y-Spoke Machined Face Forged Wheels
Monoblock · Silver / Gloss Black
Champagne Mesh Forged Wheels
Monoblock · Champagne
Mercedes-Benz OEM-Style Matte Black 5-Slot Full-Face Forged Wheels
Monoblock · Gloss Black
Brushed Silver Full-Face Forged Wheels
Monoblock · Brushed Silver
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
Because an SUV's center of gravity is already higher than a sedan's, anything added at the corners — including wheel weight — has an outsized effect on handling balance. A forged wheel lets us hit the visual stance owners want without adding the rotational mass a cast wheel of the same strength would carry.
The Mercedes-Benz GLC 300 (US) runs a 5x112 bolt pattern, 66.6mm center bore, and a F: 18x8.0J wheel from the factory. Our Flush Fitment reference is F 19x9.0J ET28 / R 19x10.0J ET35, which tucks the tire under the fender lip on a stock-height Mercedes-Benz GLC 300 (US). Our Maximum Aggressive reference is F 20x9.5J ET25 / R 20x10.5J ET30 — beyond that offset, expect rubbing against the inner fender liner under compression without further trimming.
Mercedes-Benz GLC 300 (US) OE Wheel Specs
The 2023 Mercedes-Benz GLC 300 (US) (Crossover) uses a 5x112 bolt pattern with a 66.6mm center bore. Factory wheels are F: 18x8.0J R: 18x9.0J.
Why the factory spec works for most owners:
- Supports the vehicle's curb weight and load capacity
- Preserves ground clearance for everyday and light off-road use
- Balances ride comfort with cargo and passenger stability
- Maintains clearance for the factory suspension travel and brake package
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Mercedes-Benz GLC 300 (US) (2023) 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 18x8.0J ET35 → ~5.88″ F backspacing, R 18x9.0J ET40 → ~6.57″ R backspacing
- Flush: F 19x9.0J ET28 → ~6.1″ F backspacing, R 19x10.0J ET35 → ~6.88″ R backspacing
- Max: F 20x9.5J ET25 → ~6.23″ F backspacing, R 20x10.5J ET30 → ~6.93″ 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 GLC 300 (US)? 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 GLC 300 (US) (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 GLC 300 (US) use?
The 2023 Mercedes-Benz GLC 300 (US) uses a 5x112 bolt pattern.
How many lug bolts does the Mercedes-Benz GLC 300 (US) use?
The Mercedes-Benz GLC 300 (US) 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 GLC 300 (US)?
The Mercedes-Benz GLC 300 (US)'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 GLC 300 (US)?
Factory wheels on the Mercedes-Benz GLC 300 (US) are F: 18x8.0J R: 18x9.0J.
What is the biggest wheel size I can fit on my Mercedes-Benz GLC 300 (US) without rubbing?
The most aggressive fitment we recommend without fender work is F 20x9.5J ET25 / R 20x10.5J ET30. 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 GLC 300 (US)?
For a flush look with minimal to no rubbing, we recommend F 19x9.0J ET28 / R 19x10.0J ET35 as a starting point on a stock or mildly lowered Mercedes-Benz GLC 300 (US).
Do I need wheel spacers for my Mercedes-Benz GLC 300 (US)?
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 GLC 300 (US)?
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 6.1" backspacing up front and 6.88" 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 GLC 300 (US)?
Yes — the Mercedes-Benz GLC 300 (US)'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: 150 Nm (110 ft-lb). SUV/crossover platforms (GLC/ML/GLE/GL/GLS and similar) generally use the longer 45mm 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: 18x8 wheels · 18 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.