2019 Audi S5 | 20" Lightweight Forged Monoblock · Brushed Frozen Gold Face + Gloss Black Barrel

Engineering Notes

Fastening geometry is the detail that separates this page from a generic 5×112 fitment. Audi uses a 15×32×SR12.8 ball seat on this specification, not the common 60-degree conical profile. Matching that radius is part of the wheel-to-vehicle interface and directly affects how the fastening hardware seats.

Weight provides the second defining number. Each 20×9 monoblock is listed at 11 kg while retaining an 800 kg load rating. Slim spokes are CNC-tapered through the face, allowing the design to stay visually light without reducing the wheel to delicate-looking sections.

Frozen gold is not simply a paint color. Directional brushing creates visible grain across the face before the surface is sealed, giving each spoke a more tactile metallic appearance. Gloss black occupies the barrel as a separate finishing zone, so clean masking becomes essential even though the wheel itself remains one forged piece.

Square 20×9 ET34 sizing, 5×112 PCD and 66.5 mm center bore repeat at all four corners. Consistent dimensions let weight, finishing and Audi-specific fastening geometry carry the technical story instead of relying on staggered fitment for interest.

From Design to Delivery

• CMM dimensional inspection on PCD, bore & offset
• Ball-seat profile verified to Audi OEM spec
• Dynamic balancing on every wheel
• Load-rated to 800kg per wheel

Result

Frozen gold changes the S5 without overwhelming its restrained body design. Directional grain softens the color and keeps it metallic rather than flat, while the black barrel pushes visual depth behind the face.

Recorded 11 kg mass gives the finished set equal technical and visual appeal. Nothing needs to be padded with exaggerated lightweight language when the actual number is already this strong.

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Ball Seat Before Bolt Pattern

5×112 may be the first number buyers recognize, but it is not the whole fitment.

SR12.8 ball-seat geometry and the 66.5 mm hub-centric bore are equally important to this Audi application. Treating those features accurately is what separates vehicle-specific machining from simply drilling the correct PCD.

11 kg in a Finished 20-Inch Wheel

Finished mass applies to the complete 20×9 wheel, not an unfinished blank. That gives buyers a meaningful specification rather than a broad claim about forged aluminum.

Two Finishes on One Monoblock

Gold face and black barrel might visually suggest separate components, but the structure remains monoblock.

Precise masking creates the color break; no hardware ring or separate barrel is needed. That clean construction suits the long 10-spoke design particularly well.

Square Fitment Keeps the Package Consistent

ET34 and 20×9 dimensions remain unchanged front to rear. The result is visually uniform across the S5 rather than deliberately rear-biased.

Another Audi hub or brake configuration can be checked with Xingtu before machining data is released.

1. How much does each Audi S5 B9 wheel weigh?

Finished weight is listed at 11 kg per wheel.

2. What wheel size is used?

All four corners use 20×9 with ET34.

3. Why does the ball-seat profile matter?

This setup uses an SR12.8 radius seat rather than a conical seat, so the lug interface has to be machined to the correct Audi geometry.

4. Is the gloss-black barrel a separate component?

No. Frozen gold and gloss black are two finishing zones on one forged monoblock structure.

5. What center bore is specified?

Current project data lists 66.5 mm.

6. What load rating is recorded?

The specification lists 800 kg per wheel.

7. Can the frozen-gold surface be changed?

Yes. Finish direction can change independently from the vehicle-specific hub, offset and fastening geometry.