Apex ARC-8 17x8.5 Flow-Formed Wheel 4x100mm BP / ET20 / 57.1mm CB - 4-Lug - Anthracite (BMW) (ARC81785ET20-4100-571-AN)
The Apex ARC-8 is one of the most trusted wheel designs in the BMW performance community, combining lightweight flow-formed construction with track-capable durability and timeless motorsport styling. Specifically engineered for select 4-lug BMW applications, this 17x8.5 ARC-8 delivers the ideal balance of reduced rotational weight, aggressive fitment, and real-world strength for enthusiasts who demand more from their setup.
Built using advanced flow-forming technology, the ARC-8 improves barrel strength and stiffness while keeping overall wheel weight impressively low. Extensive Finite Element Analysis (FEA) allowed Apex engineers to reinforce critical stress areas while eliminating unnecessary material for maximum performance efficiency. Finished in Anthracite, this ARC-8 gives classic and modern BMW builds a clean, aggressive appearance backed by proven engineering for both street and track use.
Quick Specs
- Part Number: ARC81785ET20-4100-571-AN
- Wheel Diameter: 17 inches
- Wheel Width: 8.5 inches
- Bolt Pattern: 4x100mm
- Offset: ET20
- Center Bore: 57.1mm
- Finish: Anthracite
- 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
- JWL and VIA Certified
- Open Hub Center Design
- Lifetime Structural Warranty
- 1 Year Finish Warranty
Features
- Flow-formed construction improves 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
- Anthracite finish delivers a clean, aggressive appearance
- Multi-stage paint 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
Track-Ready Performance Engineering
The ARC-8 was engineered for enthusiasts who actually drive their cars hard. By reducing unsprung and rotational weight, the ARC-8 sharpens steering feel, improves braking response, and enhances acceleration characteristics while maintaining the durability needed for aggressive driving environments. Whether you are building a lightweight canyon carver, track car, autocross setup, or clean street-driven BMW, the ARC-8 delivers the performance and reliability serious enthusiasts expect.
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 strong enough for track use?
A: Yes. The ARC-8 was specifically engineered for aggressive street and track driving using 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 setup. That is why we carry proven products backed by enthusiast-level support, fitment expertise, and real-world performance knowledge. Whether you are dialing in your track car or upgrading your daily-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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