Apex ARC-8 17x8.5 Flow-Formed Wheel 4x100mm BP / ET20 / 57.1mm CB - 4-Lug - Hyper Silver (BMW) (ARC81785ET20-4100-571-HS)
The Apex ARC-8 is a legendary wheel design within the BMW enthusiast community, known for combining lightweight performance, aggressive motorsport styling, and proven durability into one track-capable package. Designed specifically for select 4-lug BMW applications, this 17x8.5 ARC-8 delivers improved handling response, reduced rotational mass, and the strength enthusiasts need for both street and track driving. Finished in Hyper Silver, this wheel offers a clean, timeless appearance that perfectly complements classic and modern BMW builds alike.
Built using advanced flow-forming technology, the ARC-8 strengthens the barrel structure while keeping weight impressively low compared to traditional cast wheels. Apex engineers utilized extensive Finite Element Analysis (FEA) to reinforce critical stress areas while eliminating unnecessary material to maximize performance efficiency. The result is a wheel engineered to handle demanding driving conditions without sacrificing strength, brake clearance, or fitment versatility.
Quick Specs
- Part Number: ARC81785ET20-4100-571-HS
- Wheel Diameter: 17 inches
- Wheel Width: 8.5 inches
- Bolt Pattern: 4x100mm
- Offset: ET20
- Center Bore: 57.1mm
- Finish: Hyper Silver
- 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 compromising 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 Silver finish delivers a clean 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
Built for Real Performance Driving
The ARC-8 was engineered for enthusiasts who expect more from their wheel setup than just appearance. Reducing unsprung and rotational weight helps sharpen steering response, improve braking feel, and enhance acceleration characteristics while maintaining the durability required for aggressive driving conditions. Whether your BMW sees canyon roads, autocross events, HPDE sessions, or daily driving duty, the ARC-8 delivers the confidence and performance 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 driving?
A: Yes. The ARC-8 was specifically engineered for aggressive street and track use with reinforced flow-formed construction and extensive durability testing.
Q: Will these wheels work with 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 understand what enthusiasts expect from a performance wheel upgrade. 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 setup or upgrading 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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