Megane RS4Forged Wheel Fitment
Renault Megane RS4 forged wheel guide for 18-inch performance fitments, track-day tyre support, brake clearance, and hub-centric LFI specifications.
- 2021 Megane RS4
- LFI CSF7
- 18x9 ET41 square
- 5x114.3 / 66.1
-
Documented build
Build #23-6113 -
Wheel model
LFI CSF7 -
Size
18x9 ET41 -
PCD / Bore
5x114.3 / 66.1 -
Fitment type
Spec reference -
Photos
Awaiting on-car media
Megane RS4Fitment Strategy
Megane RS4 fitment starts with the actual vehicle, brake package, ride height, tyre load index, and hub specification. This guide records the live LFI worksheet case and gives the sizing direction LFI will refine before production.
Confirm the car.
Model year, brake package, suspension height, and alignment are checked before production.
Confirm the wheel.
Width, offset, centre bore, load rating, concavity, hardware seat, and finish are built as a single specification.
Confirm the tyre.
Tyre section width, shoulder shape, rolling diameter, and load index decide whether the final stance is clean or compromised.
KnownBuild Data
| Area | Specification | Fitment note |
|---|---|---|
| Vehicle | 2021 Megane RS4 | Live Monday worksheet case, now moved into its own guide. |
| Wheel | LFI CSF7 | Forged LFI wheel model, final profile confirmed against brake clearance. |
| Size | 18x9 ET41 | Reference customer specification. |
| PCD / Bore | 5x114.3 / 66.1 | Hub-centric specification confirmed before machining. |
Build #23-611318x9 ET41 square
Megane RS4 worksheet-backed specification
This case is recorded as an actual LFI customer fitment specification. Customer on-car images will be added only when full-car or installed-on-car media is available.
- INV2026-23-6113
- LFI CSF7
- 18x9 ET41 square
- 5x114.3 / 66.1
Wheel SizeStarting Points
| Setup | Use case | LFI notes |
|---|---|---|
| 18x8.5 ET42-48 square | Daily-road width with generous clearance for stock-height cars. | Final offset, tyre model, load index, and brake profile are confirmed before production. |
| 18x9 ET41 square | Documented RS4 customer specification for wider performance tyres. | Final offset, tyre model, load index, and brake profile are confirmed before production. |
| 19x8.5 ET42-48 square | OEM-style diameter option after confirming tyre diameter. | Final offset, tyre model, load index, and brake profile are confirmed before production. |
Load RatedFor The Vehicle
Wheel strength is matched to vehicle load, tyre load index, brake torque, and the intended duty cycle. LFI checks these values before machining and finishing each forged wheel set.
Load-rating margin
Candidate wheel load ratings are compared against the vehicle axle-load target so the final build has an appropriate reserve for road use, EV mass, passengers, and luggage.
Torque-load target
Brake torque is part of the wheel story. For this platform LFI uses a rounded static torque-load target of 1,700 Nm for engineering review.
| Candidate load | Margin vs axle baseline | Status |
|---|---|---|
| 690 kg | +13% | Road baseline |
| 790 kg | +30% | Preferred |
| 890 kg | +46% | Extra reserve |
| Load case | Validation focus | Production check |
|---|---|---|
| Radial vehicle load | Vehicle mass, passengers, luggage, and tyre load index. | Wheel load rating selected for the final duty cycle. |
| Torque load | Static brake torque target of 1,700 Nm. | Centre pad, spoke root, and bolt pad reviewed together. |
| Cornering load | Tyre grip, wheel width, offset, and suspension geometry. | Spoke, lip, and barrel profile confirmed before machining. |
| Combined static load case | Radial, torque, and lateral demand considered as one wheel system. | Final LFI drawing is checked before production release. |
BeforeProduction
Brake clearance
Caliper envelope, barrel drop, and spoke clearance are checked against the chosen wheel face.
Tyre clearance
Tyre brand, section width, shoulder shape, rolling diameter, and ride height are reviewed together.
Hub hardware
Centre bore, PCD, hardware seat, and cap plan are locked before machining.
Do Not CopyBlindly
Megane RS4 fitment should not be copied from another car without checking ride height, brake package, tyre model, suspension clearance, and local load requirements. Use these rows as starting points, not as a universal guarantee.
Live LFIBuild Record
18x9 ET41 square - spec reference
Build #23-6113 is an actual LFI customer build record. Installed photos will be added when the customer supplies usable full-car or on-car media.
ForgedModel Direction
LFI CSF7
The documented Megane RS4 wheel model and fitment direction for Build #23-6113.
LFI CSF Series
A motorsport-inspired split-spoke family suited to brake-clearance planning and road or track duty cycles.
LFI Monoblock Series
A clean forged option for owners who want lower weight, bespoke finish, and platform-specific load rating.
Singapore BuiltWorldwide Supply
Duty Paid Shipping
LFI supports international wheel builds with DDP planning where available, export packing, and clear production documentation.
Singapore / Malaysia local support
Local customers can visit LFI in Singapore for fitment planning, finish review, and after-sales support.
ReferenceSources
Renault Sport
TUV SUD wheel testing
JWL wheel standard reference
Megane RS4Questions
What is the documented Megane RS4 customer build in this guide?
Build #23-6113 records a 2021 Megane RS4 using LFI CSF7 in 18x9 ET41 square with 5x114.3 / 66.1 hub specification. Final tyre and clearance details are confirmed against the actual vehicle before production.
Can LFI build other Megane RS4 sizes?
Yes. LFI can adjust width, offset, centre bore, brake profile, finish, and wheel load rating after reviewing the vehicle, suspension height, tyre target, and brake package.
Why does this Megane RS4 guide not use the Monday media uploads as case photos?
The available media for this row was not suitable as a final on-car customer photo set. LFI keeps wheel-only, note, or engineering-only media out of fitment case galleries until full-car or installed-on-car media is available.
Does LFI confirm load rating for the Megane RS4?
Yes. LFI confirms wheel load rating, tyre load index, brake clearance, centre-bore configuration, and hardware seat before production.
Build YourMegane RS4 Wheels
Share your vehicle year, brake package, tyre target, ride height, alignment, centre-cap plan, and finish target so LFI can confirm the final forged wheel specification before production.