850T06-3 - Goodyear TL Flight Custom III 10 Ply Tire 301-125-005 8.50-10 160 mph

850T06-3 – Goodyear Flight Custom III 8.50-10 10-Ply Tubeless Aircraft Tire

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The Goodyear 850T06-3 (Manufacturer Part Number 301-125-005) is the flagship of general aviation tires, representing the third generation of the legendary Flight Custom line. This 10-ply, tubeless (TL) tire is engineered for high-performance piston and turboprop aircraft that require a balance of extreme durability and high-speed stability. As the first tire in its class to introduce a Kevlar®-reinforced belt package, the Flight Custom III is designed to minimize tread wear while providing superior protection against foreign object debris (FOD) and puncture-related failures.

With a rated speed of 160 MPH, the 850T06-3 is built to withstand the high centrifugal forces of light jet and turboprop takeoffs. The tire's design emphasizes a wide, stable footprint, which significantly improves ground handling and braking effectiveness on both dry and contaminated surfaces. For operators looking to reduce the "cost-per-landing" metric, the Flight Custom III is widely considered the industry standard for longevity, often providing up to 20% more landings than standard aircraft tires.

Key Features

• Kevlar® Brand Fiber Belt: Features an integrated belt of DuPont™ Kevlar® to enhance tread stability and provide an extra layer of protection against punctures and carcass bruising.

• Dual Polymer Tread Compound: A proprietary rubber blend that balances "tack" for wet-runway braking with high-hardness characteristics for exceptional abrasion resistance.

• Deep-Groove Symmetry: Optimized circumferential ribs designed for maximum hydroplaning resistance and high-efficiency water evacuation.

• Enhanced Rim Shield: Designed with a protective sidewall profile to prevent damage to the wheel flange during ground operations.

• Tubeless Liner Technology: High-integrity internal liner eliminates the weight of an inner tube and reduces heat buildup by removing inter-layer friction.

Technical Specifications

• Part Number: 850T06-3

• Alternate Part Number: 301-125-005

• Manufacturer: Goodyear Tire & Rubber Co.

• Product Line: Flight Custom III

• Size: 8.50-10

• Ply Rating: 10-Ply

• Rated Speed: 160 MPH

• Type: Tubeless (TL)

• Max Load Rating: 3,850 lbs (approximate, per TSO)

• Material: Specialized dual-polymer rubber with Kevlar reinforcement

• Governing Specifications: TSO-C62

• Certification: FAA-PMA / TSO approved

Aircraft Compatibility

• Beechcraft King Air 90/100/200 Series: A primary selection for main landing gear (MLG).

• Cessna 421/441 Conquest: Utilized for high-altitude corporate configurations.

• Piper PA-31T Cheyenne: Compatible with several high-performance turboprop variants.

• Aero Commander Series: Applicable to specific high-gross-weight models.

Note: Always consult the Illustrated Parts Catalog (IPC) for your specific aircraft serial number to verify the correct part number, ply rating, and speed rating.

Applications

The 850T06-3 is primarily designated as a Main Landing Gear (MLG) tire. It is engineered to support the full structural load of the aircraft during static parking, high-speed taxi, and the high-impact vertical loads of touchdown. It serves as the primary component for directional control and energy absorption during braking.

Why Choose 850T06-3?

The Goodyear Flight Custom III 850T06-3 offers the most advanced materials science available in the 8.50-10 size class. By utilizing a Kevlar-reinforced belt, Goodyear has virtually eliminated the tread "squirm" that leads to premature wear in standard bias-ply tires. This results in a tire that stays cooler, wears more evenly, and provides a greater margin of safety during high-energy braking events. For maintenance managers, the 850T06-3 represents the pinnacle of reliability, ensuring fewer tire changes and higher airframe availability.

The 850T06-3 utilizes a unique hybrid bias-ply/belted construction. While the primary carcass remains a bias-ply architecture—ideal for the high sidewall-flex requirements of general aviation gear—the inclusion of a Kevlar® belt creates a stiffened circumferential crown. This minimizes the centrifugal growth of the tire at high rotation speeds (160 MPH), which in turn reduces the internal frictional heating and prevents tread chunking. The dual-polymer tread is designed to resist the eutectic transition (softening) of the rubber during heavy braking, maintaining a consistent coefficient of friction even as temperatures climb. Furthermore, the tubeless design leverages a halobutyl inner liner to maintain gas-tight integrity, preventing the oxidative degradation of the internal nylon plies that can occur in tube-type configurations.

Note: This is a flight-critical component. As a tubeless tire, it must be mounted on a wheel assembly specifically designed and certified for tubeless operation. Ensure the wheel O-ring is replaced and the valve stem is inspected during every tire change. Installation must be performed by a certified A&P mechanic in accordance with the Goodyear Aircraft Tire Care & Maintenance Manual and the airframe's AMM. Always verify the rated speed and load requirements for your specific operating environment.

Documentation

• Goodyear Aircraft Tire Care & Maintenance Manual

• FAA TSO-C62e (Aircraft Tires)

• Goodyear Flight Custom III Technical Data Sheet