Description

The Dunlop SP Sport Maxx 050+ in size 255/35R18 94Y XL is a flagship Ultra-High Performance (UHP) summer tyre.¹ The (JP) marking confirms it was manufactured in Japan, ensuring high production standards, while Y20 indicates it is from the 2020 production year.

This is a high-performance fitment typically used for the rear axle of staggered setups on cars like the BMW 3 Series (E90/F30), Mercedes C-Class (W204/W205), and various Japanese sports icons like the Lexus IS and Toyota 86/BRZ.

🇯🇵 Dunlop SP Sport Maxx 050+ (255/35R18 94Y XL JP Y20)

Motorsport Heritage. High-Speed Stability and Japanese Precision.

The “050+” is the evolved flagship of the Sport Maxx range, designed to provide high-speed stability and a “firm” sporty feel.³ While newer models like the 060+ have since been released, the 050+ remains a respected performance choice for 18-inch wheels.

✨ Key Performance Technologies

• 🛡️ Hybrid Kevlar Nylon Band:

  To maintain the tyre’s shape at speeds up to 4$300\text{ km/h}$, Dunlop uses a specialized reinforcement band.5 This prevents the tyre from “growing” due to centrifugal force, ensuring the contact patch stays flat and steering remains precise during high-speed highway cruising.

• 🏁 Asymmetric Tread Design:

  The pattern is divided to handle different forces.6 The outer shoulder features large, rigid blocks to support the car during heavy cornering, while the inner ribs are optimized for water evacuation and straight-line braking.7

• 🌧️ 4D Nano-Design Compound:

  Using advanced molecular simulation, Dunlop developed a silica-rich compound that improves the bond between the rubber and the road.8 This earns the tyre a high rating for wet weather safety and helps reduce the risk of aquaplaning in heavy rain.9

• 📐 High-Rigidity Construction:

  The sidewall of the 050+ is famously stiff. While this provides excellent “turn-in” response (the car reacts instantly when you turn the wheel), it does result in a firmer ride compared to touring tyres like the Michelin Primacy series.

• 🎨 Nano Black Technology:

  The sidewall lettering uses micro-engraving to absorb light, creating a deep matte black finish that looks premium on performance vehicles.10

📊 Important Note on Y20 Production

Since this batch is from 2020, the rubber is now approximately 6 years old.

Technical Note: Even if unused, tyre rubber begins to harden over time (oxidation). For a high-performance tyre like the SP Sport Maxx, you may notice slightly less “bite” in the wet compared to a fresh 2025/2026 batch. It is recommended to inspect the sidewalls for any fine cracks (“dry rot”) before fitting.

📊 Performance Profile

• Dry Grip: ⭐⭐⭐⭐⭐ (Excellent for spirited driving)

• Wet Safety: ⭐⭐⭐⭐ (Solid water drainage)

• Steering Feel: ⭐⭐⭐⭐⭐ (Very sharp and communicative)

• Comfort: ⭐⭐ (Firm ride; picks up road imperfections)

The Dunlop 050+ is a “driver’s tyre.” It is ideal for those who prioritize a mechanical connection to the road and high-speed stability over a soft, pillowy ride.