Every year, approximately 1 billion waste tires are generated globally. That figure keeps growing as vehicle ownership rises across emerging markets, and the question of what happens to those tires once they’re worn out is one of the most pressing challenges in waste management today. The answer isn’t simple. Tire disposal spans a wide spectrum of outcomes, from responsible recycling that recovers valuable raw materials to illegal dumping that poisons soil and groundwater for decades.
This guide covers the full range of tire disposal methods, explains how each recycling process works, and looks at what happens to tire-derived materials once they’ve been processed. Whether you manage a tire collection operation, run a recycling facility, or are simply trying to understand how to handle waste tires responsibly, this breakdown gives you the practical information you need.
Before examining what can be done with waste tires, it’s worth understanding why they create such a persistent challenge. Unlike most waste streams, tires are deliberately engineered for durability. They’re built to resist heat, abrasion, moisture, and UV degradation, which means they resist natural decomposition just as effectively as they resist road wear.
A standard car tire can take over 80 years to break down in the natural environment. During that time, it leaches zinc, lead, and other compounds into surrounding soil and water. At scale, improperly disposed tires create public health risks that are difficult and expensive to remediate.
Whole tires are banned from landfill sites across the European Union under the EU Landfill Directive, and 38 US states prohibit whole tires from entering landfill. The reasons are straightforward: tires are buoyant in landfill conditions and tend to work their way to the surface over time, disrupting landfill capping and creating gas migration paths. They also trap methane, which increases fire risk.
Even shredded tires present challenges in landfill. The rubber content doesn’t compact efficiently, and tire-derived material takes up disproportionate volume relative to its mass. These practical and regulatory factors drive the industry toward recycling and recovery alternatives.
The numbers behind tire waste are striking. According to the Tire Industry Association, approximately 290 million scrap tires are generated in the United States alone each year. The EU generates around 350,000 tons of waste tires annually. Globally, the figure sits at approximately 1 billion tires per year, and recovery rates, while improving, vary enormously between regions.
In countries with mature recycling infrastructure, recovery rates now exceed 90%. In regions with limited regulatory frameworks or collection systems, a significant proportion of waste tires still end up in illegal dumps or are burned openly, with serious environmental and public health consequences.
Tire disposal doesn’t happen through a single process. In practice, waste tires move through several possible pathways depending on their condition, the regulatory environment, the collection infrastructure in place, and the available processing capacity nearby. The methods range from the destructive and harmful to the genuinely circular.
Landfill is the worst outcome for waste tires, and it remains more common than it should be in regions without strong enforcement. Beyond the regulatory prohibitions already noted, tires in landfill create long-term liability. They take up space that doesn’t compress over time, they generate gas pockets, and they provide ideal breeding conditions for mosquitoes when rainwater collects inside them.
Tire-derived mosquito breeding has been directly linked to outbreaks of dengue fever and malaria in tropical and subtropical regions where large numbers of waste tires are stored outdoors. The public health cost of improper tire storage is real, and it provides one of the strongest practical arguments for proper collection and recycling infrastructure.
Tire dumps present their own serious risks, distinct from those associated with landfill. The primary concern is fire. Tire stockpiles are notoriously difficult to ignite accidentally, but once burning, they are extraordinarily difficult to extinguish. Historic tire fires have burned for years and even decades. The Springfield, Ohio tire fire burned for nine months before being contained. The Heyope tire dump in Wales burned for 15 years.
A burning tire stockpile releases a toxic cocktail of compounds including benzene, styrene, polycyclic aromatic hydrocarbons, and heavy metals. Runoff from firefighting efforts contaminates groundwater. The cleanup costs for a major tire fire regularly run into millions of dollars.
Proper baling is one practical method for reducing the risk in legitimate tire storage operations. Baled tires have significantly reduced oxygen availability compared to loose piles, which lowers fire risk and simplifies storage management. Gradeall’s MKII Tire Baler compresses up to 110 car tires into a single dense bale, which takes up roughly 80% less volume than loose tires and reduces fire risk in holding facilities.
Retreading, also known as remolding or recapping, extends a tire’s usable life by replacing the worn tread while keeping the structural casing intact. It’s most common in commercial vehicle operations, particularly trucking, aviation, and bus fleets, where the casing represents the majority of the tire’s material value.
Retreading conserves the rubber, steel, and fabric that make up the tire casing, which is the most resource-intensive part to manufacture. A retreaded commercial truck tire uses roughly 30% less oil than a new tire to produce. The process requires careful inspection of the casing for structural integrity, buffing of the old tread, application of new rubber compound, and curing under heat and pressure.
Not every tire is a retreading candidate. Sidewall damage, bead failure, and casing separation disqualify a tire from retreading. Those tires move into the recycling stream.
Repurposing involves using whole or minimally processed tires for secondary applications. This is typically a small-scale and informal end-use, but it has genuine value in appropriate contexts. Common applications include playground surfaces (using cut tires as climbing structures or impact-absorbing borders), retaining wall systems using stacked tire columns filled with compacted earth, garden planters and raised beds, and agricultural uses such as weighted covers for silage pits.
Repurposing is not a solution at industrial scale. It absorbs a small number of tires and provides minimal processing compared to dedicated recycling streams. For high-volume operations, it’s a complement at best rather than a primary disposal route.
Recycling is the responsible end-of-life pathway for the vast majority of waste tires that aren’t retreaded. It converts tire materials into commercially useful products while keeping rubber, steel, and fiber out of landfill and out of the environment. The processes involved vary in technology, output quality, and infrastructure requirements.
Most tire recycling operations begin with size reduction. Before material can be recovered, tires need to be processed down from their whole form, which makes them difficult to handle and transport efficiently, into a form that allows separation of constituent materials.
The standard processing sequence runs roughly as follows. First, tires are inspected and sorted. Oversized tires, such as OTR (off-the-road) equipment tires and truck tires, are often separated for dedicated processing. Steel rims are removed using equipment such as tire rim separators, which can strip a steel or alloy rim from a tire in under 20 seconds.
For operations that process tires for baling prior to shipping to a recycling facility, sidewall cutting is often performed first. Cutting the sidewalls off a tire before baling improves bale density and consistency, reduces the force required by the baler, and improves PAS 108 compliance for tire bales destined for civil engineering applications.
Mechanical shredding is the most widely used tire recycling process globally. Whole tires, or pre-cut tire sections, are fed into industrial shredders that reduce them to chips, typically in the 25mm to 75mm range. These chips then undergo secondary processing, passing through granulators and mills that further reduce particle size.
Steel wire is separated using magnetic drums. Fiber is separated using air classification. The cleaned rubber granulate, known as crumb rubber or recycled rubber granulate (RRG), is the primary commercial product. It’s available in a range of particle sizes from coarse chips down to fine powder (80 mesh and below), each suited to different applications.
Crumb rubber is used in sports surfaces and running tracks, playground impact attenuation surfaces, rubberized asphalt, rubber-modified concrete, molded rubber products, and as a processing aid in rubber manufacturing. The market for crumb rubber has grown substantially, driven partly by regulations restricting infill materials in artificial sports surfaces and partly by increasing recycled content requirements in construction materials.
Pyrolysis processes tires by heating them in a low-oxygen or oxygen-free environment. Unlike combustion, pyrolysis doesn’t burn the tire; it breaks down the polymer chains thermally into simpler molecular fractions that exit the reactor as gas or condensate. The outputs are pyrolysis oil (also called tire-derived fuel oil, or TDFO), syngas, recovered carbon black (rCB), and steel wire.
Pyrolysis oil is used as a fuel or as a chemical feedstock. Its calorific value is broadly comparable to diesel. Recovered carbon black can substitute for virgin carbon black in rubber manufacturing, though the quality varies depending on the process and the feedstock.
Pyrolysis is technically well-established, but its economics are sensitive to energy costs, output product prices, and feedstock quality. Operations that can secure a consistent, well-sorted feedstock and have markets for all output streams tend to be more viable than those treating mixed or contaminated material.
Devulcanization is a process that reverses some of the chemical crosslinking that gives vulcanized rubber its strength and resilience. During vulcanization in tire manufacturing, sulfur bridges are created between polymer chains; devulcanization selectively breaks these bridges, returning the rubber to a more processable state.
The appeal of devulcanization is that it potentially allows recycled rubber to re-enter the tire manufacturing supply chain as a true feedstock rather than a lower-grade filler. In practice, fully devulcanized rubber meeting the specifications required for tire compound production is technically challenging and expensive to achieve at commercial scale. Partial devulcanization producing rubber suitable for non-tire applications is more common.
Tire-derived fuel (TDF) involves using shredded tires as a supplemental fuel in high-temperature industrial processes, most commonly cement kilns and pulp mills. Cement kilns operate at temperatures above 1,400°C and provide conditions that allow complete combustion of the rubber along with destruction of organic contaminants, while the steel and ash are incorporated into the clinker.
TDF is not recycling in the material recovery sense; it’s energy recovery. The material value of the tire is not preserved. But in the waste management hierarchy, energy recovery from a material that would otherwise go to landfill is generally considered preferable to disposal. TDF provides a reliable outlet for tire material that doesn’t meet the quality requirements for crumb rubber or other recycling streams.
Understanding the end markets for tire-derived materials is important for anyone involved in tire collection, processing, or procurement. The products made from recycled tires cover a surprisingly wide range.
Rubber granulate and crumb rubber are used in sports pitch infill and running track binders, playground safety surfacing certified to EN 1177 and ASTM F1292, rubber mulch for landscaping, rubber-modified asphalt for road surfaces (which increases road life and reduces noise), acoustic insulation products, anti-vibration mounts and pads, shoe soles and rubber flooring, and as a processing aid in new rubber compound production.
Tire-derived steel is recovered and recycled through standard steel scrap channels. It’s a relatively pure form of steel wire and commands reasonable market pricing.
Recovered carbon black (rCB) from pyrolysis is used in rubber products, coatings, inks, and as a reinforcing filler. The quality and performance of rCB varies depending on the pyrolysis process, and it typically commands a discount to virgin carbon black, though this gap is narrowing as specifications improve.
Civil engineering applications are a significant and growing market for tire bales specifically. PAS 108-compliant tire bales are used in retaining wall construction, embankment stabilization, noise barriers, and temporary access roads. The bales are stable, lightweight relative to concrete, and provide good drainage characteristics. Gradeall’s tire baling equipment is designed to produce bales meeting the PAS 108 standard, which governs tire bale specifications for construction use in the UK.
Primary recycling, in the technical sense, means returning a material to its original form and function without significant reprocessing. For tires, true primary recycling isn’t feasible. A worn tire cannot be directly converted back into a new tire through a simple reprocessing step. The vulcanization, the structural complexity, and the degradation during service life all prevent it.
What is possible, through processes like devulcanization or pyrolysis-derived feedstocks, is returning some of the material value of the tire into the rubber and carbon black supply chains. This is a form of material recovery, and it moves closer to circularity, but it isn’t primary recycling in the strict sense.
Retreading comes closest to primary recycling in practice. By reusing the tire casing with a new tread layer, retreading extends the original product’s life without converting it into a different material form. For eligible commercial vehicle tires, retreading is the highest-order recycling outcome.
For businesses handling significant volumes of waste tires, the right equipment makes a practical difference to both processing efficiency and end-product quality. The equipment used depends on the scale of the operation, the tire types being processed, and the intended end market for the processed material.
Tire balers are the starting point for operations that collect whole tires before shipping to a processing facility. Baling reduces transport volume, cuts haulage costs, and, when done to PAS 108 specification, creates a product with a direct civil engineering market. Gradeall manufactures a range of tire balers suited to car tires, truck tires, and OTR equipment tires, including the MKII Tire Baler, which produces up to 6 bales per hour, and the Truck Tire Baler for larger commercial vehicle tires.
Sidewall cutters are used upstream of the baler to remove the beaded sidewall from car tires, improving bale density and reducing baler wear. For truck tires, truck tire sidewall cutters handle the heavier sidewall sections that would otherwise slow baling significantly. Gradeall’s car tire sidewall cutter processes up to 140 tires per hour.
Rim separators handle the derimming step for tires still mounted on wheels. Gradeall’s tire rim separator removes steel or alloy rims in under 20 seconds per tire, allowing the clean rubber casing to proceed into the processing stream while the rim goes to scrap metal.
For operations handling OTR tires from mining, quarrying, and construction equipment, specialized cutting equipment is required. The sheer size and weight of OTR tires makes standard processing equipment inadequate. Gradeall’s OTR tire cutting equipment is engineered specifically for these oversized applications, addressing a processing challenge that standard tire machinery simply can’t handle.
As Conor Murphy, Director of Gradeall International, notes: “The biggest operational bottleneck we see in tire recycling facilities isn’t the downstream processing; it’s the front-end handling. Getting tires into a form that can be efficiently transported, stored, and processed is where the right equipment makes the biggest difference to throughput and cost.”
No. Tires are classified as a special waste category and are prohibited from municipal waste streams in most countries. They cannot be placed in regular trash or general dumpsters. Most jurisdictions have specific tire collection programs, and retailers and tire fitting operations are typically required to accept used tires for recycling at the point of sale. Illegal tire dumping carries significant fines in many regions.
Recycling rates vary significantly by region. The United States Tire Manufacturers Association reports that approximately 76% of scrap tires generated in the US were beneficially used in 2021. In the EU, the European Tire and Rubber Manufacturers Association reports recovery rates exceeding 95% in many member states. Many developing regions have lower recovery rates due to limited collection infrastructure.
Profitability depends heavily on processing volume, equipment investment, the end markets available for processed material, and local tipping fees or collection subsidies. Operations with high-volume, consistent feedstock and reliable end markets for crumb rubber or baled tires tend to be viable. Small-scale or inconsistent operations often struggle with margins. Many operations use tire-derived fuel as a fallback market when primary recycling outlet prices are weak.
Truck tires go through the same general recycling pathways as car tires, but the processing requirements differ. The greater mass, steel content, and reinforced bead of truck tires demands more robust equipment. Sidewall cutting is even more important for truck tires prior to baling, as the thicker sidewalls significantly affect bale quality. Retreading is also more common for commercial truck tires than for passenger vehicles.
PAS 108 is the British Standard that specifies the requirements for tire bales used in civil engineering and construction. It covers bale dimensions, density, tire composition, and structural properties. PAS 108-compliant bales are used in retaining wall systems, slope stabilization, noise barriers, and temporary road construction. The standard provides specifiers and contractors with confidence that baled tire material meets the performance requirements for these structural applications.
The time from a whole tire entering the processing chain to a saleable product varies by process. Baling can be done in seconds per tire. Mechanical shredding and granulation to crumb rubber takes minutes per tire but is typically a continuous batch process. Pyrolysis has longer cycle times and is typically run as a continuous or semi-continuous process for economic operation.
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