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Michelin Tire Casing Technologies: Built for Durability and Performance
 

A tire's casing is the foundation of its durability, performance and potential for retreading. Michelin's advanced tire casing technologies are engineered to improve strength, support longer tire life and help fleets manage operating costs. Explore seven Michelin casing innovations designed for applications ranging from commercial trucking to mining and construction.

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Casing Technologies at a Glance

Explore Michelin's tire casing technologies, their primary benefits and the applications they support. Select a technology below to learn how it works and discover Michelin tires that feature it.
 

Technology
Primary Benefit
Ideal Applications

B2

Reinforced bead area for improved durability and service life

Mining and Construction

Duracoil

Reinforced bead stability for improved casing durability

Commercial trucking

Duracore

Durable casing construction designed to support multiple retreads

Long-haul trucking

Infini-Coil

Continuous steel cable reinforcement for casing stability and durability

Freight and Passenger transportation

NRF

Reinforced construction for improved impact resistance

Underground mining

Opticoil

Optimized casing design that reduces raw material use

Commercial trucking

Powercoil

High-strength steel cables for improved casing endurance

Freight and Passenger transportation

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B2 TECHNOLOGY

 


What is Michelin B2 Technology?
 

MICHELIN B2

MICHELIN B2

Michelin B² technology reinforces the tire's bead area, where the tire connects to the wheel rim. Its wider metal bead wire increases contact with the rim, helping improve bead strength and reduce tire movement on the wheel.

Designed for demanding applications such as mining, quarries, construction and material handling, B² technology helps improve durability and extend tire service life under heavy loads and high torque.


What Are the Benefits of Michelin B² Technology?
 

Productivity
 

Michelin B² technology features a 30% wider bead bundle and contact area, improving clamping force and pressure distribution at the tire-to-rim interface. This design can support up to 20% more torque*, helping tires perform in demanding heavy-equipment applications.

Longevity
 

The reinforced bead area is designed to withstand high torque and heavy loads, supporting longer tire service life and helping reduce replacement costs.

Reliability
 

By strengthening the bead area and improving contact with the rim, B² technology helps reduce tire movement on the wheel and supports reliable performance in demanding operating conditions.


Michelin Tires Featuring B2 Technology

Michelin B² technology is featured in select off-road tires designed for demanding mining, quarrying and construction applications, including loader and heavy-haul operations.

MICHELIN
X MINE D2 Extra Load
More Load(1), A Tougher Tire(2)
See Tire
MICHELIN
X UM HAUL
PRODUCTIVITY UNDER HEAVY HAULS
See Tire
MICHELIN
XTXL (Construction)
With exceptional load capacity and maximum tire life, the Michelin XTXL tire is engineered to strengthen your productivity. It offers outsanding durability that provides the comfort and safety your operator needs to get the job done.
See Tire
Explore Other Casing Technologies
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DURACOIL TECHNOLOGY

 

 

What is Michelin DURACOIL Technology?
 

Michelin Duracoil technology reinforces the tire's bead area with a high-resistance nylon layer between the tire and the wheel. This additional reinforcement helps protect the bead structure, improve stability at the tire-to-rim interface, and support casing durability throughout the tire's service life.

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What are the Benefits of DURACOIL Technology?
 

Casing Durability
 

Duracoil reinforces the bead area to help protect the tire casing and support longer service life. By maintaining casing integrity, this technology can also support the tire's potential for retreading, when the casing meets applicable inspection and retreadability requirements.

Bead Stability
 

The reinforced nylon layer helps improve bead stability at the tire-to-rim interface, supporting reliable performance during commercial truck operations.

 

Michelin Tires Featuring DURACOIL Technology
 

MICHELIN
X® COACH Z
Designed with safety, grip and performance at the forefront for coach and bus* fleets operating in regional and line haul environments.
See Tire
MICHELIN
X® MULTI HL Z
Designed to optimize durability and mileage performance in high load regional construction, bulk and tanker operations.
See Tire
Explore Other Casing Technologies
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DURACORE TECHNOLOGY

 

 

What is Michelin DURACORE Technology?
 

Michelin Duracore casing technology combines two Michelin innovations: Infinicoil and Powercoil. Together, these technologies reinforce the tire casing to improve durability and support multiple tire lives through retreading. Duracore casings are designed to support up to four retreads, subject to casing condition and inspection requirements, helping fleets maximize their tire investment.

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What are the Benefits of DURACORE Technology?
 

Casing Durability
 

Duracore combines the stability of Michelin Infinicoil technology with the strength of Michelin Powercoil technology to reinforce the tire casing. This construction supports durability and endurance in demanding commercial truck applications.

Retreadability
 

Michelin Duracore casings are designed to support up to four retreads when casing condition and applicable retreading requirements allow. This helps fleets extend the useful life of their tire casings across multiple service cycles.

Total Cost of Ownership
 

By supporting multiple retreads, Duracore technology can help fleets get more value from each casing and reduce the need for new tire purchases. Extending casing life can also help reduce material consumption over time.

 

Michelin Tires Featuring DURACORE Technology
 

MICHELIN
X® LINE ENERGY™ Z+
A long haul steer tire with a casing so durable it’s designed to reach up to 1 million miles with up to 4 retreads.
See Tire
MICHELIN
X® LINE ENERGY™ D+
Michelin’s most fuel efficient(1) dual Drive tire, the X® LINE ENERGY™ D+ features a casing designed to reach up to 1 million miles with up to 4 retreads.
See Tire
MICHELIN
X® LINE GRIP D
A drive tire that provides exceptional mileage, lasting traction and features a casing so durable it’s designed to reach up to 1 million miles with up to 4 retreads.
See Tire
Explore Other Casing Technologies
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INFINI-COIL TECHNOLOGY

 

 

What is Michelin INFINI-COIL Technology?
 

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Michelin Infini-Coil technology uses a continuous steel wire, up to a quarter-mile long, wrapped around the tire's circumference to reinforce and stabilize the casing. This construction helps limit tire deformation under heavy loads and demanding operating conditions, supporting casing durability and extended mileage potential.

 

What are the Benefits of INFINI-COIL Technology?
 

Energy Efficiency
 

By helping stabilize the tire casing and limit deformation, Infini-Coil technology can reduce energy loss as the tire rolls, supporting improved fuel efficiency.

Casing Durability
 

The continuous steel reinforcement helps strengthen the tire casing and maintain stability under demanding operating conditions. This supports casing durability and the potential for multiple retreads, subject to casing condition and inspection.

Extended Mileage Potential
 

By reinforcing the casing and improving stability, Infini-Coil technology helps support longer casing life and greater mileage potential, allowing fleets to get more value from their tire investment.

 

Michelin Tires Featuring INFINI-COIL Technology
 

MICHELIN
X® COACH Z
Designed with safety, grip and performance at the forefront for coach and bus* fleets operating in regional and line haul environments.
See Tire
MICHELIN
X® MULTI HL Z
Designed to optimize durability and mileage performance in high load regional construction, bulk and tanker operations.
See Tire
Explore Other Casing Technologies
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NRF TECHNOLOGY

 

 

What is Michelin NRF Technology?
 

Michelin NRF technology reinforces off-road tire construction to help withstand the harsh conditions of underground mining, where tires are exposed to rocks, debris and repeated impacts.

The technology incorporates two additional plies containing cross-woven nylon cords to strengthen the tire structure. Reinforced cables in the working plies provide additional resistance to impacts and help protect against oxidation.

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What are the Benefits of NRF Technology?
 

Impact Resistance
 

Additional nylon-reinforced plies and strengthened cables help the tire withstand impacts from rocks and debris encountered in underground mining operations.

Enhanced Durability
 

NRF technology reinforces the tire structure and helps protect against oxidation, supporting durability in the demanding conditions of underground mining.

Reduced Downtime Potential

By improving resistance to impacts and harsh operating conditions, NRF technology can help reduce tire damage that may lead to unplanned maintenance and equipment downtime.

 

Michelin Tires Featuring NRF Technology

Explore Michelin off-road tires featuring NRF technology, designed to withstand the demanding conditions of underground mining.
 

MICHELIN
X MINE D2 Extra Load
More Load(1), A Tougher Tire(2)
See Tire
MICHELIN
XSM D2+
The underground mining loader tire for extreme conditions
See Tire
MICHELIN
XMINE D2 PRO
Designed for extreme underground mining and quarry conditions. It offers improved aggression resistance and reduced downtime, thanks to new cables and NRF technology. The tire also boasts an increased load capacity of up to 18% and enhanced tire life due to optimized compounds.
See Tire
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OPTICOIL TECHNOLOGY

 

 

What is Michelin OPTICOIL Technology?
 

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Michelin Opticoil technology optimizes the design and distribution of materials in the tire's bead area to reduce tire weight while maintaining durability. Its redesigned bead structure uses less material without compromising the strength needed for commercial truck applications.

Opticoil is often combined with Michelin Duracoil technology, which provides additional reinforcement and stability in the bead area.

 

What are the Benefits of OPTICOIL Technology?
 

Reduced Material Consumption
 

By optimizing the bead area's construction, Opticoil technology reduces the amount of raw material needed to manufacture the tire while maintaining durability. This supports more efficient use of materials in tire production.

Reduced Tire Weight
 

Opticoil's lighter bead design helps reduce overall tire weight. Depending on the tire and application, this weight reduction may contribute to improved vehicle payload efficiency.

 

Michelin Tires Featuring OPTICOIL Technology

MICHELIN
X® MULTI ENERGY™ Z2
Challenging the traditional trade off, and setting new standards, in fuel efficiency, traction and mileage performance for super regional and regional applications.
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POWERCOIL TECHNOLOGY

 

 

What is Michelin POWERCOIL Technology?
 

Michelin Powercoil technology uses a new generation of high-strength steel cables protected by rubber to reinforce the tire casing. The rubber coating helps shield the cables from air, water and friction, while the reinforced construction supports casing durability, mileage potential and reduced rolling resistance.

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What are the Benefits of POWERCOIL Technology?
 

Casing Durability
 

High-strength steel cables reinforced with protective rubber help the tire casing resist distortion and damage. This supports longer casing life and the potential for multiple retreads, subject to casing condition and inspection requirements.

Lower Rolling Resistance
 

Powercoil's lightweight, high-strength steel cables help limit casing deformation and rolling resistance, supporting improved energy efficiency during commercial truck operations.

Extended Casing Value
 

By supporting casing durability and retreadability, Powercoil technology can help fleets get more value from their tires over multiple service lives. Extending casing use may also reduce the need for replacement tires and associated raw material consumption.

 

Michelin Tires Featuring POWERCOIL Technology

Explore Michelin commercial truck tires featuring Powercoil technology, designed to support casing durability and performance in freight and passenger transportation applications.

 

MICHELIN
X® COACH Z
Designed with safety, grip and performance at the forefront for coach and bus* fleets operating in regional and line haul environments.
See Tire
MICHELIN
X® LINE ENERGY™ Z
Our best just got better. The Michelin X® LINE ENERGY™ Z tire is guaranteed to deliver 20% more mileage vs. leading competitor line haul steer tires* and 5% better rolling resistance than the Michelin XZA3+ EVERTREAD tire** it replaces.
See Tire
MICHELIN
X® MULTI T2 - 17.5
The highway trailer radial optimized for low bed, high cube trailer operations in regional applications.
See Tire
MICHELIN
X® LINE GRIP D
A drive tire that provides exceptional mileage, lasting traction and features a casing so durable it’s designed to reach up to 1 million miles with up to 4 retreads.
See Tire
Explore Other Casing Technologies

Frequently Asked Questions About Michelin Casing Technologies

Why Is Casing Technology Important for Fleets?

The casing provides the structural foundation of a tire. Michelin casing technologies are designed to improve durability, support retreadability and help tires withstand demanding operating conditions. Depending on the technology and application, these benefits can contribute to longer casing life and lower total cost of ownership.

How Does Casing Technology Affect Retreadability?

A durable tire casing is essential for retreading. Michelin technologies such as Duracore, Infini-Coil and Powercoil help reinforce the casing and support its structural integrity over multiple service lives. Whether a tire can be retreaded depends on its condition and the results of a qualified casing inspection.

Which Michelin Casing Technologies Are Designed for Demanding Conditions?

Different Michelin casing technologies address different operating conditions. NRF technology reinforces tires used in demanding underground mining environments, while B2 technology strengthens the bead area for heavy-duty applications such as mining, quarrying and construction. Duracoil technology provides additional bead reinforcement for commercial truck tires.

How Can Casing Innovations Reduce Operating Costs?

Michelin casing technologies can help fleets manage operating costs by supporting tire durability, casing mileage and retreadability. Certain technologies also help reduce rolling resistance, which can contribute to fuel efficiency. Together, these benefits can help lower tire-related total cost of ownership.

Are Michelin Casing Technologies Compatible With All Tire Types?

No. Michelin casing technologies are developed for specific tire designs and applications, including commercial trucking, passenger transportation, construction and mining. Availability varies by tire model, so check individual Michelin tire specifications to identify which technologies are included.


Want to know more about other Michelin technologies?
 


Learn About Michelin Technologies
LEGAL MENTIONS

*Internal study compared with standard Michelin tires. Specific values according to size.

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