Wheel 9.5 x 20" Type AC4 offset 50 for BMW + Toyota

Philosophy/Design

Technically modern design combined with a high quality production process, these attributes characterise the AC Schnitzer AC4 Flowforming wheel generation, which is launched in the sizes 8.5J x 20" and 9.5J x 20", in the colour variants BiColor Silver/Black and Black.

The circumferential undercut reflects the high technical standard of the AC4 Flowforming rim. This is because this design element can actually only be realised if it is machined out of a solid material, such as is required in the forging process, as it is located behind the spokes. The undercut of the AC4 Flowforming rims is particularly visible on the BiColor version, as it brings out the high-quality aluminium with its silver surface.

Material

Only high-quality aluminium alloys are used. The material is additionally heat-treated in the production process, which results in higher strength and simultaneous weight reduction.

Material samples during the production process guarantee the constant and high quality of the material.

Manufacture

Due to the production process, the new AC4 Flowforming rims are lighter than conventionally cast alloy rims and this is measurable: the 8.5J x 20" weighs just 11 kg and the 9.5J x 20" rim also weighs only 11.9 kg.

The flowforming process is one of the most advanced manufacturing technologies in wheel industry. In this production process, after the actual aluminium casting, the raw product is further processed by rolling it out. This step serves to compress the metal, which guarantees greater stability and impact resistance of the rim.

On the other hand, the improved stability also allows the design of the wheels to be more filigree, as the wall thicknesses can be significantly thinner compared to conventionally manufactured rims.

Test Procedures / Safety

After their design, the first sample rims are manufactured under real production conditions. These must undergo a multitude of tests. Among other things, the strength is tested. The "rim life" is simulated in the bending circumferential test. Every AC Schnitzer rim must withstand this intact in order to be allowed to be produced and sold at all.

This is followed by vehicle-specific tests, including test installations with check of unobstructed movement and driving tests on public roads and on race tracks. Only after these procedures our rims receive their homologation, i.e. the approval to be used in road traffic.

Wheels are safety-relevant components. Therefore, they are checked and tested with the greatest care. This starts with the first chemical material tests and ends with hard testing machine endurance runs:

• § 30 StVZO wheel guideline
• ECE R124
• Bending-rotation tests
• 90° impact test
• unwinding tests

Uniqueness of the AC4 Flowforming Wheels:

• engineered in Germany
• compatible with standard RDC system
• also available as a complete wheel
• Warranty 2 years
• production monitored according to ISO standard
• KDS mount for wheel alignment according to BMW specification is available
• Spacers/mounting package for the best possible position in the wheel arch (to be ordered separately)
• Assembly package vehicle specific optional

Scope of delivery

• Specific hub cover
• homologation certificate
• Optional vehicle- and rim-specific mounting and fastening material
• care instructions

Fits

• BMW i5 G60/G61 (since 2023): for rear axle
• BMW i4 G26 (since 2021): for rear axle
• BMW 5 Series G60/G61 (since 2023): for rear axle; - For vehicles with a rear axle load higher than 1640 kg in conjunction with a trailer hitch, available on request
• BMW 4 Series G22/G23 LCI (since 2024): for rear axle
• BMW 4 Series G22/G23 (2020 - 2024): for rear axle
• BMW 4 Series G26 (since 2021): for rear axle
• BMW 3 Series G20/G21 LCI (since 2022): - PHEV on request
• BMW 3 Series G20/G21 (2019 - 2022): - PHEV on request
• BMW Z4 G29 (since 2019): for rear axle
• Toyota GR Supra (since 2019): for rear axle