Beringer Aero RF-004(D) 4.00-6" Tubeless Aircraft Wheel and Brake Assembly

Beringer Aero RF‑004(D) Wheel Assembly

Product Overview

The Beringer Aero RF‑004(D) is a premium 4.00‑6″SL tubeless wheel assembly designed for light aircraft. Featuring Beringer’s renowned precision machining and high-strength aerospace aluminum construction, this wheel is suitable for applications where reliability, performance, and reduced maintenance are paramount.

Highlights

• High-Strength Billet Aluminum: Machined in two halves, sulfuric anodized for exceptional durability and corrosion resistance

• Tubeless Design: Equipped with O-ring sealing and a rigid valve for enhanced safety and upkeep

• Maintenance-Friendly Bearings: Sealed waterproof bearings eliminate the need for repacking (stainless steel bearings available as an option)

• Aerotec® Braking Caliper: Innovative patent-protected caliper with stainless-steel piston and sintered metallic brake pads bonded to backplates (not riveted)

• Floating Brake Disc: Allows for thermal expansion and minimizes warping during heavy braking cycles

Specifications

• Part Number: RF‑004(D)

• Wheel Size: 4.00‑6″SL (approx. ø30‑ø25 cm)

• Construction: 2‑half billet aluminum

• Finish: Red sulfuric anodization (standard)

• Brake System: Single caliper, Aerotec® design

• Brake Pads: Sintered metallic, bonded style

• Bearings: Waterproof sealed (optional stainless steel upgrade)

• Tire Compatibility: Use per tire-wheel correspondence; tubeless only

• Brake Fluid Options: DOT 4 or MIL-standard mineral oil (specific to caliper seals)

Compatible Aircraft

While exact compatibility should always be confirmed via STC documentation and aircraft maintenance manuals, the RF‑004(D) is commonly used in:

• Ultralights

• Light Sport Aircraft (LSA)

• Homebuilt kitplanes

• Gliders

• Amphibians

• Gyrocopters

• Spot-certified for various tail‑draggers and light conventional gear aircraft

Installation & Maintenance Notes

• Servicing Manuals: Wheel installation, torque specs, brake servicing and bleeding procedures are detailed in Beringer’s Maintenance Manuals (e.g., MM‑02‑001 for wheels and SM‑01 for brakes)

• Torque Requirements:

  • Axle fasteners: ~10–20 N·m depending on size

  • Banjo fittings: 15–17 N·m

  • Bleed screws: 15–17 N·m

• Break-in Procedure: 20–30 gentle landings to condition pads and discs; initial braking power may be 50% reduced until break-in is complete

• Brake Pad Wear Limit: Minimum thickness 1 mm (~0.039 in) before replacement

Summary

The Beringer Aero RF‑004(D) offers an advanced, high-performance tubeless wheel and brake solution ideally suited for aircraft in the ultralight, LSA, homebuilt, glider, amphibian, and gyro categories. With its lightweight billet aluminum construction, sealed bearings, and Aerotec® braking technology—including sintered pads and floating disc—it delivers superior stopping power, enhanced safety, and lower maintenance needs. Installation and servicing are well-documented in Beringer’s manuals, making it a robust upgrade for aircraft operators seeking reliable ground performance.