Apex ARC-8 17x8.5 Flow-Formed Wheel 4x100mm BP / ET20 / 57.1mm CB - 4-Lug - Race Silver (BMW) (ARC81785ET20-4100-571-RS)
The Apex ARC-8 is one of the most recognized and trusted performance wheel designs in the BMW enthusiast community, offering an ideal blend of lightweight engineering, aggressive motorsport styling, and track-capable durability. Designed specifically for select 4-lug BMW applications, this 17x8.5 ARC-8 improves handling response, braking feel, and overall vehicle dynamics while giving your BMW a clean, race-inspired appearance. Finished in Race Silver, this wheel delivers a timeless motorsport look that works perfectly on both classic and modern BMW builds.
Built using advanced flow-forming technology, the ARC-8 strengthens the barrel structure while minimizing overall wheel weight compared to traditional cast designs. Extensive Finite Element Analysis (FEA) allowed Apex engineers to reinforce critical stress areas while eliminating unnecessary material for maximum performance efficiency. The result is a wheel capable of handling aggressive street driving, autocross competition, and repeated track use without sacrificing strength, fitment precision, or brake clearance.
Quick Specs
- Part Number: ARC81785ET20-4100-571-RS
- Wheel Diameter: 17 inches
- Wheel Width: 8.5 inches
- Bolt Pattern: 4x100mm
- Offset: ET20
- Center Bore: 57.1mm
- Finish: Race 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-inspired 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 during track use
- 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
- Race Silver finish delivers a timeless 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 Enthusiast Use
The ARC-8 was engineered for enthusiasts who expect more from their wheel setup than just appearance. Reducing unsprung and rotational mass improves steering precision, braking performance, and acceleration characteristics while maintaining the durability needed for aggressive driving environments. Whether your BMW is built for canyon driving, HPDE events, autocross competition, or spirited 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 aggressive 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 true 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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