Customer-specification fitment guide for the Audi RS5 B8 / B9. 5x112, 66.5 / 73.1 with 66.5 hubring, hub-centric — referenced against recorded LFI customer builds and specified from the car outward.
LFI forged wheels for the Audi RS5 B8 / B9 use 5x112 PCD, 66.5 mm hub-centric planning for most records, RS brake-clearance review, and width, offset and tyre support matched to the actual car before production.
Audi RS5 B8 / B9 Specification Notes
Recorded RS5 customer specs in this guide include 19x9.5, 19x10, 20x9.5 and 20x10 directions on 5x112. LFI confirms the exact B8 or B9 centre bore, hardware seat, tyre diameter, brake template and offset before machining so the wheel is built around the car rather than a generic RS5 listing.
Chassis-Matched Width, offset, and concavity specified to the vehicle — specified from measured vehicle requirements rather than shelf-size assumptions.
02
Brake Clearance Spoke profile, barrel contour, and backpad machined to the brake package on the exact car.
03
Forged Response Lower unsprung mass sharpens steering, braking feel, and ride control — immediately noticeable from the first drive.
Quick Specs
FitmentSnapshot
Area
Guide value
Fitment note
PCD
5x112
Confirmed at order time.
Centre bore
66.5 mm hub-centric target
One older 73.1 / 66.5-ring build is retained as a customer record; new LFI builds should be machined hub-centric to the confirmed car.
Face profile is selected around brake clearance and load specification.
Featured Case
Customer FitmentReference
2019 Audi RS5 MF13 fitment
A recorded LFI customer specification. Final width, offset, tyre pairing, ride height, hardware seat and load specification are confirmed against the actual vehicle at order time.
2019 Audi RS5 on MF13.2019 Audi RS5 on MF13.2019 Audi RS5 on MF13.2019 Audi RS5 on MF13.2019 Audi RS5 on MF13.2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610358.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610363.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610364.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610366.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610367.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610368.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610369.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610370.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610371.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610372.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610374.jpg2019 Audi RS5 MF13 fitment - inv2026-3-4197-rs5-mf13-56610375.jpg
The primary row is drawn from recorded LFI build data. Alternate rows are specification directions — brake template, tyre shoulder, load target, and ride height are confirmed at order time.
Direction
Wheel size
Wheel model
Best for
Notes
Primary
19x9.5 ET23
CSF1 v2
Real LFI build record
LFI customer fitment record. Confirm tyre shoulder, brake template, ride height, and final offset.
Alternate
19x10 ET31
LFI custom build
Customer-proven direction
LFI customer fitment record. Confirm tyre shoulder, brake template, ride height, and final offset.
Recovered RS5
20x9.5 ET18
LFI custom monoblock
B9.5 aggressive street
Blue RS5 customer case. Confirm RS brake clearance, tyre shoulder, ride height, and final offset.
Recovered RS5
20x10 ET25
LFI custom monoblock
Maximum concave street
Yellow RS5 customer case. Confirm RS brake clearance, tyre shoulder, ride height, and final offset.
Additional
20x9.5 ET27
MF13
Customer-proven direction
LFI customer fitment record. Confirm tyre shoulder, brake template, ride height, and final offset.
Concave Visualizer
Preview Concave FitmentBefore Choosing Specs
Use the same LFI Concave Slider from the full guide to see how offset, wheel width and diameter change the visual face depth for a custom forged wheel.
Wheel strength is not a single number. Vertical load, braking torque, drive torque, spoke-root stress, hub-pad stress, and bolt-seat behavior are all part of the engineering package — validated together, not in isolation.
Why load rating still matters
The RS5 is a fast Quattro coupe with wide tires, large brakes, and real braking load, so the wheel should carry more than the static vehicle weight alone suggests. For selected RS5 road-use specifications, LFI positions 690 kg per wheel as the practical starting point. For repeated high-speed use, sticky tires, harsher roads, or extra-reserve applications, 790 kg per wheel can be evaluated where the wheel family allows it.
Torque Validation
Wheel strength is broader than vertical load. LFI also reviews acceleration, braking, cornering, potholes, tyre grip, hub-pad stress, bolt-seat stress, spoke-root stress, and rim-barrel torque reaction against an approximately 1,700 Nm per wheel static torque load target.
For the full engineering story behind each wheel, LFI's How LFI Wheels Are Made page covers design, forging, CNC machining, finishing, and quality control.
Wheel load rating
Per-axle equivalent
Margin vs axle baseline
Status
How LFI positions it
590 kg
1,180 kg per axle
~9% margin
Low reserve
Use only after exact vehicle label, tyre load index, and duty cycle are confirmed.
690 kg
1,380 kg per axle
~28% margin
Preferred
Practical RS5 road-use and fast-road target when tyre load index and intended use are correctly matched.
790 kg
1,580 kg per axle
~46% margin
Extra reserve
Useful for repeated high-speed, harsher-road, sticky-tyre, heavier-duty, or extra-reserve applications.
Torque-load target: approximately 1,700 Nm per wheel under conservative dry-braking validation.
Validation load case
Reference basis
LFI target direction
Why it matters
Radial vehicle load
Vehicle mass, passengers, tyre package, and selected wheel load specification
690 kg preferred target
Vehicle mass and sustained road loading.
Torque load
RS5 braking, tyre rolling radius, tyre grip, and drivetrain torque review
~1,700 Nm per wheel
Loads the hub pad, bolt seats, spoke roots, and rim barrel.
Cornering load
Lateral force from road grip, sticky tires, and fast-road or track use
Application-specific
Lateral loading under cornering.
Combined static load case
Radial load + torque load + cornering load
Application-specific
Real-world loads are combined, not isolated.
Engineering Article
Why Radial-Load FEAAlone Is Not Enough
For forged wheel applications, vertical load is one part of the engineering picture. LFI also reviews spoke-root stress, hub-pad loading, bolt-seat behavior, rim-barrel stress, and combined static road-load cases where relevant.
FEA before machining: LFI checks spoke load paths, hub pad thickness, lug-seat region, rim barrel behavior, brake clearance, and material distribution.Weight and reserve: final RS5 wheel weight varies by size, width, offset, design, finish, brake clearance, and selected load target.
Critical fitment warning: do not order Audi RS5 B8 / B9 wheels by model name alone. Confirm PCD, centre bore, brake package, hardware seat, tyre size, and ride height before production.
Testing & Validation
Standards, TestingAnd Internal Validation
Term
Meaning
How it applies to LFI custom wheels
JWL
Japanese technical standard for light alloy wheels.
Used as a reference standard for relevant load and durability requirements.
VIA
Japanese third-party wheel registration and verification system.
Applies only to specific wheel models/specifications that are formally registered.
TÃœV
European technical testing or certification framework.
Applies only when a specific wheel/specification has supporting TÃœV documentation.
SAE
Common industry test framework for aftermarket wheel performance and impact evaluation.
Useful for impact and fatigue validation depending on market and specification.
Internal validation
LFI's own engineering and test process.
Used for bespoke specifications built from validated design families.
Static FEA
Computer-based engineering simulation.
Used before machining to evaluate stress, weight, torque load, and clearance.
Selected high-volume reference specifications may be supported by external lab reporting or third-party documentation. Bespoke Audi RS5 B8 / B9 specifications are engineered from the same design families and reviewed through LFI's internal design, load, brake-clearance, and fitment-validation process. Customers can also review LFI's Testing & Compliance page for the broader testing-language context.
Reference test basis: CSF1 19x9 ET29 was tested to JWL Aug. 2014 conditions at the stated load.
Named lab route: the reference report runs through a TUV SUD accredited lab. Each custom order still gets its own load, brake, tyre, and fitment review.
Case Studies
Customer Fitment StoriesPhoto And Spec Cases
2019 Audi RS5 MF13 fitment
A recorded LFI customer specification. Final width, offset, tyre pairing, ride height, hardware seat and load specification are confirmed against the actual vehicle at order time.
2019 Audi RS5 on MF13.2019 Audi RS5 on MF13.2019 Audi RS5 on MF13.2019 Audi RS5 on MF13.2019 Audi RS5 on MF13.2019 Audi RS5 on MF13.
This recovered blue RS5 case from the original combined guide uses the widebody arch volume to run an aggressive ET18 offset while retaining square tyre logic. The main engineering priority is RS brake clearance, because the B9 / B9.5 RS5 front caliper and optional ceramic brakes can eliminate many off-the-shelf wheel options.
LFI04292021_25: blue Audi B9.5 RS5 fitted with LFI custom 20x9.5 ET18 square forged wheels.Rear wheel detail showing the aggressive RS5 street stance.
This recovered yellow RS5 case uses a 20x10 ET25 square setup for a deeper concave profile and large 275-section tyre support. Heavy backpad pocketing helps control weight despite the wider barrel and electroplated finish.
LFI012022_268: yellow Audi RS5 fitted with LFI custom 20x10 ET25 square forged wheels.Alternate angle showing the 20x10 maximum-concave RS5 stance.
A recorded LFI customer specification. Final width, offset, tyre pairing, ride height, hardware seat and load specification are confirmed against the actual vehicle at order time.
Specification reference
A recorded build with full specification data. Installed photos to follow.
A recorded LFI customer specification. Final width, offset, tyre pairing, ride height, hardware seat and load specification are confirmed against the actual vehicle at order time.
Specification reference
A recorded build with full specification data. Installed photos to follow.
Audi RS5 B8 / B9 BuildsFrom Singapore to Global Customers
LFI supports Audi RS5 B8 / B9 customers with vehicle-specific forged wheel consultation, DDP supply where available, and direct Singapore / Malaysia support. Fitment recommendations are based on the confirmed vehicle, brake package, tyre target, load requirement, and intended use.
Fitment Consultation
LFI helps owners choose between OEM+, lightweight square, brake-clearance, show-style, and track-focused forged setups.
Road & Tyre Conditions
City roads, highways, potholes, wet-weather tires, ride comfort, and tyre availability can all change the best wheel and tyre recommendation.
Global Supply
DDP shipping available to major markets. The price quoted is the price paid — no surprise duties or taxes on delivery.
Singapore / Malaysia Direct Support
Singapore customers can visit LFI at 76 Playfair Road, #01-03, Singapore 367996 to view forged wheel samples, finishes, concavity profiles, and selected in-stock wheels.
Malaysia customers can order directly with LFI and request pre-production consultation for road use, track use, tyre availability, and brake clearance.
Are the Audi RS5 B8 / B9 Forged Wheel Fitment Guide case studies real LFI customer builds?
Yes. Every case study is drawn from a recorded LFI customer build and specification.
What PCD does LFI confirm before machining?
The RS5 fitment records in this guide use 5x112 PCD. LFI still confirms the exact car, hardware seat, centre bore, and brake package before production.
How is the hub bore confirmed?
Most RS5 builds in this guide use a 66.5 mm hub-centric target. LFI confirms the exact car before machining so the wheel can be built hub-centric for the vehicle.
What wheel size is a sensible starting point?
The customer records include 19x9.5 ET23, 19x10 ET31, 20x9.5 ET18, 20x9.5 ET27, and 20x10 ET25. Final tyre pairing, brake clearance, and ride height still need review.
Can LFI build this fitment without spacers?
Yes. Offset, brake clearance, and body clearance are machined into the wheel — no spacer dependency.
Why do some cases show customer images coming soon?
Some recorded builds have complete specification data while customer images are still pending.
What should I send before LFI quotes a build?
Model year, trim, brake package, tyre target, ride height, alignment, PCD, centre bore, hardware seat, centre-cap plan, finish, load target, and intended use.
Can Singapore, Malaysia, and international owners order directly from LFI?
Yes. LFI supports Singapore and Malaysia locally, and ships worldwide with remote fitment consultation.
Can I choose a different finish from the photos?
Yes. Every finish is custom — gloss, satin, brushed, polished, bronze, black, silver, and bespoke options are available.
Do I need to copy the exact photographed setup?
No. The photographed setup is a reference. Width, offset, concavity, finish, and tyre pairing are adjusted to your car and priorities.
Will these wheels clear big brakes?
Yes, when the caliper template, barrel profile, spoke shape, backpad, and offset are specified correctly. LFI validates brake clearance as part of the build.
Can LFI build a more comfortable daily setup?
Yes. A comfort-biased setup uses conservatively sized wheels and tyres with enough sidewall for road use.
Can LFI build a more aggressive show setup?
Yes. Fender clearance, steering lock, tyre shoulder, ride height, and alignment must be reviewed as a package.
Can I keep factory centre caps?
Yes, when the cap diameter, clip style, pocket depth, and face profile are specified in the build.
Are square setups available?
Yes. A square setup gives you tyre rotation, predictable handling, and a clean road package.
Are staggered setups available?
Yes. Staggered setups are available when the platform, tyre diameters, and drivetrain support them.
Why does LFI care about tyre shoulder shape?
Two tyres with identical printed sizes can fit differently. Shoulder profile affects fender clearance, steering lock clearance, and final stance.
Why not order by offset alone?
Offset alone does not describe a wheel. Width, tyre size, brake clearance, hub geometry, concavity, and ride height all determine whether the setup works.
Can LFI ship internationally?
Yes. International orders are supported with remote fitment consultation.
Start Your Audi RS5 B8 / B9Build
Share your model year, brake package, tyre target, ride height, alignment, centre-cap plan, and finish target so LFI can confirm the forged wheel specification.
