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Smart Flex AL51

Outstanding mileage performance without compromising fuel efficiency for long & regional haul use


  • Long Haul
  • Regional Haul
Tractor/Trailer, Truck Recommended
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Outstanding mileage performance without compromising fuel efficiency for long & regional haul use

Optimised Block Size

Wide tread blocks enhance the tyre's rigidity and improve the mileage while delivering low rolling resistance.

Hidden Groove

As hidden grooves appear at the end of wear, it keeps wet grip and traction performance.

Tread Wear Equalised Stepper (T.W.E.S.)

Small step-shaped blocks provide even wearing and prevent stone trapping, resulting in a long tyre life.

Integrated Premium Technologies: Hidden Groove

Hankook premium technologies deliver high grip and mileage performance from the first to last milimeter of tyre life. Our 'no compromise' development approach ensures that also a low rolling resistance is kept at all stages of wear, benefitting both your budget and the environment.

New Tyre

Thorougly developed tread pattern design delivering high grip performance and mileage while being fuel efficient.

40% Wear

Interlocking 3D sipes are revealed, supporting tread block stiffness to keep up the high level of grip and a low rolling resistance.

70% Wear

Hidden grooves appear when the tyre is 70% worn delivering improved wet grip and traction performance.

3-dimensional sipe

Full Depth 3D sipes maintain excellent mileage and traction throughout the entire life of the tyre by reinforcing and interlocking the tread blocks.

Controlled tearing and wearing
→ Reduce irregular wear.
Full depth sipe applied
Improving traction and grip throughout the life of the tyre.

Innovative Mixing System

The Innovative Mixing System (IMS) minimises the disconnection of the polymer chain and oxidation. The carbon black reinforcement also has higher dispersion levels. These effects of IMS help strengthen the bonding force between the carbon black and rubber for a stronger compound and lower heat generation.
The benefits of IMS are higher mileage and fuel efficiency.

1 Step
Larger molecular weight by minimising the breakdown of the polymer chain.

2 Step
Increased strength and decreased heat generation.

Higher mileage and improved fuel efficiency.

Stiffness Control Contour Technology (SCCT)

SCCT is designed for constant profile deformation. If the casing profile cannot be kept constant, the internal force on the casing will be concentrated on a specific point (belt edge or turned up casing edge). In contrast, SCCT controls the dispersion of internal forces for better durability.

SCCT allows Hankook Tire to develop tyres by balancing optimum stiffness with the contact shape. The benefits of this technology are improved performance, safety, cornering, braking and durability.

  • Test Results

  • Spec

    • 295/80R22.5
      • Fuel Efficiency B
      • Wet Grip C
      • External Rolling Noise 70
      • Tube Type / Tubeless L
      • Measuring Rim 9.00X22.5
      • Load Index 154/149M
      • Section Width(mm) 306
      • Tread Width(mm) 230
      • Tread Depth(mm) 13.5
      • Static Loaded Radius(mm) 484
      • Overall Diameter(mm) 1049
      • M+S Y
      • 3PMSF Y
      • Origin China
    • 315/70R22.5
      • Fuel Efficiency B
      • Wet Grip B
      • External Rolling Noise 72
      • Tube Type / Tubeless L
      • Measuring Rim 9.0X22.5
      • Load Index 156/150L
      • Section Width(mm) 312
      • Tread Width(mm) 270
      • Tread Depth(mm) 14.0
      • Static Loaded Radius(mm) 466
      • Overall Diameter(mm) 1010
      • M+S Y
      • 3PMSF Y
      • Origin Korea

EU Tyre Label

Download your EU Tyre label below.