Apex ARC-8 17x8.5 Flow-Formed Wheel 4x100mm BP / ET20 / 57.1mm CB - 4-Lug - Hyper Black (BMW) (ARC81785ET20-4100-571-NHBK)
The Apex ARC-8 has become a benchmark wheel in the BMW enthusiast world by delivering lightweight performance, aggressive styling, and track-capable durability in one proven package. Designed specifically for select 4-lug BMW applications, this 17x8.5 ARC-8 improves handling response, braking feel, and overall driving dynamics while giving your BMW a clean motorsport-inspired appearance. Finished in Hyper Black, this wheel adds a modern, high-contrast look that perfectly complements both classic and contemporary BMW builds.
Built using advanced flow-forming technology, the ARC-8 strengthens the barrel structure while minimizing unnecessary weight compared to traditional cast wheels. Apex engineers utilized extensive Finite Element Analysis (FEA) to reinforce critical stress zones while optimizing material placement for maximum efficiency and durability. The result is a wheel engineered to withstand aggressive street driving, autocross competition, and track abuse without compromising strength or fitment versatility.
Quick Specs
- Part Number: ARC81785ET20-4100-571-NHBK
- Wheel Diameter: 17 inches
- Wheel Width: 8.5 inches
- Bolt Pattern: 4x100mm
- Offset: ET20
- Center Bore: 57.1mm
- Finish: Hyper Black
- Construction: Flow-Formed Aluminum
- Configuration: 4-Lug
- Vehicle Compatibility: Select BMW Applications
- Hub Centric Design
- Big Brake Kit Clearance
- OEM TPMS Compatible
- Compatible with OEM and Aftermarket Hardware
- Open Hub Center Design
- JWL and VIA Certified
- Lifetime Structural Warranty
- 1 Year Finish Warranty
Features
- Flow-formed construction improves barrel strength while reducing overall wheel weight
- Designed specifically for select 4x100 BMW applications
- Deep-concave ARC-8 spoke profile delivers aggressive motorsport styling
- Engineered using advanced FEA testing for optimized strength and durability
- Designed to clear many popular aftermarket big brake kits
- Engineered for maximum weight savings without sacrificing structural integrity
- Open hub center design allows for faster wheel swaps at the track
- Oversized lug openings accommodate impact sockets and race lugs
- Hub-centric design minimizes vibration and ensures precise fitment
- Compatible with OEM and aftermarket TPMS sensors
- Works with OEM wheel hardware and most aftermarket lug setups
- Hyper Black finish provides a bold motorsport-inspired appearance
- Multi-stage finishing process preserves mounting surfaces for proper torque values
- VIA certified and tested beyond standard JWL requirements
- Includes Apex gloss black center cap compatible with OEM sizing
- Covered by Apex accidental damage replacement program
- Backed by Apex lifetime structural warranty
Designed for Enthusiast Driving
The ARC-8 was engineered for enthusiasts who expect more than just appearance from their wheel setup. Reducing unsprung and rotational mass improves steering precision, braking response, and acceleration characteristics while maintaining the durability needed for repeated hard driving. Whether your BMW is built for canyon roads, autocross competition, HPDE sessions, or aggressive street driving, the ARC-8 delivers the confidence and performance serious enthusiasts demand.
Fitment
Fits select BMW applications utilizing:
- 4x100mm Bolt Pattern
- 57.1mm Center Bore
- ET20 Offset
Common applications may include select BMW E30 and compatible 4-lug BMW models. Always verify wheel, tire, suspension, and brake clearance prior to installation.
FAQs
Q: Are Apex ARC-8 wheels suitable for track use?
A: Yes. The ARC-8 was engineered specifically for aggressive street and track driving with reinforced flow-formed construction and extensive durability testing.
Q: Do these wheels support OEM BMW TPMS sensors?
A: Absolutely. Apex ARC-8 wheels are compatible with OEM and aftermarket TPMS sensors along with standard valve stems.
Why Buy from Beefcake Racing?
At Beefcake Racing, we know enthusiasts expect more from a performance wheel than just good looks. That is why we carry proven products backed by enthusiast-level support, fitment expertise, and real-world performance knowledge. Whether you are building a dedicated track car or refining your street-driven BMW, our team can help you choose the right wheel and tire combination for your goals.
Need help with wheel fitment, tire sizing, or brake clearance? Contact Beefcake Racing today.
Email: sales@beefcakeracing.com
Phone: 1-855-827-7223
Note: Wheels that have been mounted with tires are considered used and cannot be returned or refunded. Please verify vehicle fitment before placing your order, and always test fit wheels prior to tire mounting.
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