Staggered 21" Forged Wheels for 2022 BMW 840i Gran Coupe | Gloss Black

Engineering Notes

Unusually low recorded mass is the detail worth preserving on this page. Front wheels measure 21×9 and are listed at 11.5 kg; the wider 21×10.5 rear is recorded at 11.3 kg. Rather than speculating about why the rear figure is marginally lower, keeping the verified project data exactly as recorded is the more professional approach.

Monoblock construction gives the Y-spoke design an uninterrupted path from hub area to barrel. No assembly bolts or separate polished section interrupt the long spoke lines, which suits the cleaner visual language of the Gran Coupe.

ET30 front and ET28 rear create a modest difference in wheel position. Existing Engineering Notes also state that the setup maintains brake clearance without spacers, making that a much more relevant fitment detail than generic claims about “flush stance.”

Gloss black changes character depending on light. In shade, the narrow Y branches visually merge and simplify the face. Under stronger reflections, the spoke splits become much easier to see. That allows one finish to move between understated and more technical without adding another color.

From Design to Delivery

•  100% CMM dimensional inspection
• Dynamic balancing
• Structural load testing (725kg rated)
• Gloss finish QC

Result

Rather than transforming the 840i into something visually extreme, this wheel sharpens the character already present in the Gran Coupe.

Slim spokes follow the car's elongated proportions, wider rear sizing adds a little more visual authority at the back, and gloss black keeps the complete set disciplined. The recorded 11.3–11.5 kg weights give the project a technical distinction that does not depend on styling language.

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Wider at the Rear, Not Larger

Both axles remain 21 inches in diameter. Width is what creates the stagger: 9 inches in front, 10.5 inches behind.

That keeps one consistent wheel scale around the car while letting the rear gain extra presence.

No Spacer Correction in the Recorded Fitment

Existing project notes state that ET30 front and ET28 rear were matched with brake clearance and no spacers required. That is worth highlighting because it describes what the actual finished setup achieved instead of adding a generic customization statement.

Slim Spokes Suit a 21-Inch Face

Large diameters can look heavy when the center is filled with broad surfaces. Narrow Y-spokes reduce that visual mass and leave more negative space around the brake area.

Gloss black reinforces the effect by making the spoke branches appear even slimmer from a distance.

Let the Verified Numbers Speak

11.5 kg front and 11.3 kg rear are more persuasive than repeatedly calling the wheel “ultra-light.” The same applies to the 725 kg load rating: concrete specifications carry more value than generic superlatives.

Different 8 Series configurations can be discussed with Xingtu where brake hardware, width or desired wheel position changes.

1. What are the wheel sizes on this BMW 840i Gran Coupe?

Front wheels measure 21×9, with 21×10.5 used at the rear.

2. How much do the wheels weigh?

Current project data records 11.5 kg front and 11.3 kg rear.

3. Are spacers used?

No spacers are required according to the existing Engineering Notes for this setup.

4. What offsets are specified?

Front offset is ET30 and rear offset is ET28.

5. What is the load rating?

Each wheel is listed at 725 kg.

6. Why use gloss black with this wheel design?

Gloss black visually simplifies the long Y-spoke face while still revealing its split geometry under direct light.

7. Can a different 8 Series setup use the same dimensions?

Not automatically. Brake package, suspension and desired wheel position should be checked before repeating the specification.