2020 BMW M8 — Brushed Silver Concave 5-Spoke 2-Piece Forged with Polished Lip (21" Staggered)

Engineering Notes

Five broad spokes leave very little decoration to distract from the center profile, so depth becomes the feature that defines this M8 wheel.

Brushed silver helps preserve that depth. Fine machining grain remains visible across the spoke faces, while the polished outer lip reflects more sharply and establishes a clear boundary between center and barrel. Both finishes stay metallic, but they behave differently under light.

Two-piece construction supports that separation physically as well as visually. Center geometry can develop its concave profile independently from the outer section, allowing the wheel to gain depth without filling the 21-inch face with additional spokes or styling elements.

Finished weights remain closely matched at 13.9 kg front and 14.1 kg rear despite the additional rear width, while each wheel carries the listed 750 kg load rating.

From Design to Delivery

• CMM dimensional inspection (PCD / CB / runout)
• Dynamic balancing on every wheel
• 2-piece hardware torqued to spec & pressure-tested for seal
• Forged 6061-T6, hub-centric machining verified
• Brushed/polished finish QC under controlled lighting before packing

Result

Rear width adds the stronger concave impression, while matching ET18 values keep the front-to-rear strategy unusually simple for a staggered 21-inch setup.

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One Offset, Two Widths

Using ET18 on both axles gives this build an interesting distinction from many staggered setups. Rather than creating front-to-rear variation through both width and offset, the M8 moves from 10 inches to 11 inches while retaining the same ET figure.

That approach gives the rear additional depth without changing every fitment variable at once.

21×10 Front

Ten inches of front width gives the large 21-inch face substantial presence. Deep concavity is still visible, but the front remains the more restrained half of the pair.

21×11 Rear

Adding one inch at the rear allows the outer lip and concave center to appear deeper. Because ET18 remains unchanged, that increase in width becomes an important part of the rear-wheel appearance.

Developed for the M8 Proportions

Large arches and a broad body give the M8 enough visual scale to carry a 21-inch wheel without requiring an intricate spoke network. Xingtu can also revise width, concavity and finishing for another BMW configuration where the stance or brake package differs from this set.

1. What sizes are used on these BMW M8 forged wheels?

This set uses 21×10 front wheels and 21×11 rear wheels.

2. Are the front and rear offsets different?

No. ET18 is listed for both front and rear wheels even though the widths differ.

3. How much do these wheels weigh?

Front wheel weight is 13.9 kg, while the wider rear wheel is listed at 14.1 kg.

4. What is the load rating?

Each wheel carries a stated 750 kg load rating.

5. Why combine brushed silver with a polished lip?

Brushing gives the center visible metal texture, while polishing creates a brighter edge around the wheel. Using both finishes also makes the 2-piece structure more visually apparent.

6. What center bore and bolt pattern are used?

Current specifications list a 66.6 mm center bore and 5×112 PCD.

7. Can the concavity be changed for another BMW?

Face depth can vary with width, offset, brake clearance and the selected wheel design, so another configuration should be developed around its own dimensions.

8. Can another M8 use a different finish?

Yes. Buyers can send their preferred dimensions and finish direction when developing another custom specification.