255/40R21 102Y Dunlop SportmaxxRT2 MO XL (GE)

SKU: DU2554021RT2MO
In Stock

Original price was: $409.50.Current price is: $288.00.

The Dunlop Sport Maxx RT 2 in size 255/40R21 102Y XL is a flagship Ultra-High Performance (UHP) summer tyre that serves as the 2026 benchmark for steering precision. The MO marking signifies that this is a Mercedes-Benz Original fitment, specifically co-developed for the Mercedes-Benz GLC 43 AMG and high-performance GLC variants.

The (GE) designation confirms manufacturing in Germany, ensuring the highest tier of European quality control.

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Description

Dunlop Sport Maxx RT 2 (255/40R21 102Y MO XL GE)

The Mercedes AMG Standard. Racing Technology for the Executive SUV.

The “RT” stands for Racing Technology, and this second-generation model is designed to provide “the best of both worlds”—the aggressive dry grip of a track tyre with the wet-weather safety required for daily road use.

Specification Detail
Size 255/40R21
Load Index 102 (XL – Extra Load: Max Load 850 kg per tyre)
Speed Rating Y (Max Speed: 300 km/h / 186 mph)
Homologation MO (Mercedes-Benz Approved)
Origin GE (Germany)
UTQG Rating 240 AA A (Focus on Max Traction)

✨ Key 2026 Performance Technologies

  • 🏎️ Power Braking Blocks:

    The tread features high-stiffness blocks designed to resist deformation under extreme pressure. This ensures that during high-speed emergency stops, the tyre maintains a massive contact patch, delivering significantly shorter braking distances.

  • 📐 Dual Silica Racing Compound:

    Derived from Dunlop’s motorsport heritage, the compound is infused with traction resins that improve the rubber’s “interlocking” capability with the road. This provides exceptional dry grip and a sharp “turn-in” feel.

  • 🔇 Noise Shield Technology:

    To complement the luxury of a Mercedes-Benz cabin, this GE-made variant features an optimized pitch sequence. At 72dB, it effectively disperses road noise, ensuring a quiet and refined driving experience despite its aggressive performance profile.

  • 🌧️ Wide Circumferential Hydro-Grooves:

    The asymmetric pattern includes deep longitudinal channels that act as high-velocity water pumps. This provides exceptional resistance to hydroplaning, a critical safety margin during heavy tropical afternoon cloudbursts.

  • 🏗️ Multi-Radius Tread (MRT):

    This technology ensures a more uniform pressure distribution across the tyre’s footprint. This leads to more even tread wear and a more predictable handling sensation throughout the tyre’s entire lifespan.

📊 Performance Summary

  • Steering Precision: ⭐⭐⭐⭐⭐ (Razor-sharp AMG-spec feel)

  • Wet Safety: ⭐⭐⭐⭐⭐ (Benchmark Class-A braking)

  • Dry Handling: ⭐⭐⭐⭐⭐ (Exceptional lateral grip)

  • Ride Quality: ⭐⭐⭐⭐ (Firm and communicative)

The Dunlop Sport Maxx RT 2 MO is the essential choice for 2026 for Mercedes GLC 43 owners. It is the only tyre that preserves the car’s original steering geometry, braking certifications, and high-speed stability ratings.

Additional information

Width

255

Height

40

Rim size

21

Model

SPMaxxRT2

Run Flat

No

Load / Speed Index

102Y

Brands

Dunlop

Year

2021

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