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2015 Renault Megane RS 275 Cup-S Wheels & Rims: Bolt Pattern, Offset & Sizes
Fitting Renault Megane RS 275 Cup-S wheels? This page gives the 2015 Renault Megane RS 275 Cup-S bolt pattern (5x114.3), centre bore, factory rim size and the offset range for aftermarket and forged Renault Megane RS 275 Cup-S rims: the same spec sheet ANKUSI uses when machining forged wheels for this car.
Quick answer: The 2015 Renault Megane RS 275 Cup-S uses a 5x114.3 bolt pattern with a 66.1 mm centre bore and M12x1.5 lug bolts. Factory wheels: 18x8.25J ET65. For aftermarket wheels, 18x8.5J ET55 sits flush.
Forged wheels for the 2015 Renault Megane RS 275 Cup-S — drilled 5x114.3 with a 66.1 mm centre bore, built to the offset you choose. From $220 per wheel, made to order in 20–25 days.
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Renault Megane RS 275 Cup-S (2015): 5x114.3 bolt pattern, 66.1mm center bore, OE 18x8.25J ET65. Forged wheel fitment specs from ANKUSI.
Bolt Pattern5x114.3
Wheel Bolt/NutM12x1.5 Bolt
Center Bore66.1mm
Wheel Load Rating700–850 kg/wheel (Performance / Sports Car segment reference)
Year2015
Category5-Lug Performance / Tuner
✓ 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) | 18x8.25J ET65 |
| Flush Fitment | 18x8.5J at ET55 offset |
Forged Wheel Designs for the Renault Megane RS 275 Cup-S
Every design below is forged to order, so it can be machined to the Renault Megane RS 275 Cup-S's 5x114.3 bolt pattern and 66.1 mm center bore, with the width and offset calculated for your setup.
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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
Most of the engineering value in a forged wheel over a cast one shows up in rotational mass, not outright strength — both can meet the same load rating, but the forged piece gets there lighter. On a sedan platform tuned for everyday balance, that weight saving is felt directly in steering response and ride quality.
The Renault Megane RS 275 Cup-S ships from the factory on a 5x114.3 bolt pattern with a 66.1mm center bore and a 18x8.25J ET65 wheel. Our flush reference for the Renault Megane RS 275 Cup-S is 18x8.5J ET55.; our maximum aggressive reference is 19x9J ET50. — beyond that, expect clearance issues against the fender liner without further modification.
Renault Megane RS 275 Cup-S OE Wheel Specs
The Renault Megane RS 275 Cup-S ships from the factory on 5x114.3 bolt pattern wheels with a 66.1mm center bore. The stock wheel size is 18x8.25J ET65, offering a balanced ride that suits most owners without any rubbing or clearance concerns.
Why the factory spec works for most owners:
- Balances ride comfort with steering response and highway efficiency.
- Wide tire and wheel availability at the factory diameter keeps replacement costs low.
- Lower unsprung weight than larger aftermarket wheels helps ride quality and acceleration.
- Guaranteed clearance against brake calipers and suspension components.
ANKUSI builds these wheels — we are the forging factory, not a reseller. For the Renault Megane RS 275 Cup-S (2015) we drill the 5x114.3 pattern and cut the centre bore to 66.1mm 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 and Backspacing: Factory Wheel vs Options
Backspacing ≈ width/2 + ET/25.4 + 0.5 in. "Inward" means closer to the suspension; "outward" means closer to the fender lip.
| Setup | Size | ET | Backspacing | Inward vs OE | Outward vs OE |
|---|---|---|---|---|---|
| Factory (OE) | 18x8.25J | ET65 | 7.18 in (182 mm) | — | — |
| Flush | 18x8.5J | ET55 | 6.92 in (176 mm) | −7 mm | +13 mm |
| Maximum | 19x9J | ET50 | 6.97 in (177 mm) | −5 mm | +25 mm |
Vehicles With the Same Hub as the Renault Megane RS 275 Cup-S (5x114.3, 66.1 mm Bore)
In our database, 224 other vehicle entries from 9 makes use exactly the same 5x114.3 bolt pattern and 66.1 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.
5x114.3 is used by 20.0% of the vehicle pages in our English fitment guide (1,300 of 6,503); 17.3% of those also use a 66.1 mm center bore.
Hub-Centric Rings for a 66.1 mm Center Bore
A wheel with a center bore larger than 66.1 mm needs a hub-centric ring. The most common combinations:
| Wheel bore | Ring size |
|---|---|
| 66.6 mm | 66.6 → 66.1 mm |
| 67.1 mm | 67.1 → 66.1 mm |
| 70.1 mm | 70.1 → 66.1 mm |
| 70.5 mm | 70.5 → 66.1 mm |
| 73.1 mm | 73.1 → 66.1 mm |
ANKUSI forged wheels are bored to exactly 66.1 mm for this vehicle, so no ring is needed.
Frequently Asked Questions
What bolt pattern (PCD) does the Renault Megane RS 275 Cup-S use?
The 2015 Renault Megane RS 275 Cup-S uses a 5x114.3 bolt pattern.
How many lug bolts does the Renault Megane RS 275 Cup-S use?
The Renault Megane RS 275 Cup-S uses a 5-lug bolt pattern (5x114.3), so you need a 5-lug forged wheel to bolt straight on.
What is the center bore size on the Renault Megane RS 275 Cup-S?
The Renault Megane RS 275 Cup-S's center bore is 66.1mm. 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 Renault Megane RS 275 Cup-S?
Factory wheels on the Renault Megane RS 275 Cup-S are 18x8.25J ET65.
What does a flush wheel fitment look like on the Renault Megane RS 275 Cup-S?
For a flush look with minimal to no rubbing, we recommend 18x8.5J at ET55 offset as a starting point on a stock or mildly lowered Renault Megane RS 275 Cup-S.
Do I need wheel spacers for my Renault Megane RS 275 Cup-S?
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 Renault Megane RS 275 Cup-S?
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 6.92" of backspacing.
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 Renault Megane RS 275 Cup-S?
The Renault Megane RS 275 Cup-S runs the same wheel size front and rear from the factory, so staggered fitment is not required. ANKUSI can still forge a staggered set (wider rear) on request if you want a more aggressive stance.
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: 18 inch wheels.
Compiled by the ANKUSI Wheels engineering team, an IATF 16949 and ISO 9001 certified forged wheel factory in Guangzhou.