Retreaded and remanufactured tyres give a second life to worn tyres and are the result of a process that combines technological innovation and environmental respect.
Retreading is primarily aimed at the heavy-duty market (85%). It accounts for only 12% of sales for passenger vehicles.
What is a retreaded tyre?
Simply put, a retreaded tyre is a worn tyre that has been refurbished through a process called retreading. This method involves replacing the worn tread with a new one while retaining the tyre's internal structure, known as the carcass. It is not a completely new tyre but one that has undergone a transformation to extend its lifespan, a renovation that combines economy and environmental respect.
What is retreading?
Now that you know what a retreaded tyre is, you might be wondering: what is retreading? This fairly technical process takes place in several stages.
First, the tyre carcass is carefully inspected to detect any defects or damage. Only tyres with a still-solid internal structure are selected for retreading.
Next, the old tread is removed, and the surface is prepared to receive a new layer of rubber.
It is important to note that not all tyres are eligible for retreading. The selection criteria are precise and aim to ensure the safety and quality of the final product. Here are some of these criteria:
- The carcass must be in good condition, without deformations or internal damage that could compromise the structure.
- The tyre must not have exceeded its maximum lifespan. Advanced age can weaken the tyre and make it unsuitable for retreading.
- Tyres that have undergone major repairs or have been poorly maintained may also be rejected.
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How to retread a tyre?
The tyre retreading operation is a true industrial process that requires precision and expertise. To better understand what it entails, let's take a closer look at the main stages of retreading:
- Initial inspection: First, each tyre intended for retreading is examined to ensure it is suitable for retreading. This includes checking the internal structure, any damage to the carcass (such as bulges or cuts), and the depth of the grooves. Advanced inspection methods like laser scanning or X-ray can be used to detect hidden defects.
- Buffing: Once the tyre is deemed suitable for retreading, the old tread is removed by buffing. This step prepares the surface for optimal adhesion of the new tread.
- Treading: The new tread is applied to the tyre carcass. This can be done cold with pre-moulded bands or hot by applying a new rubber coating that is then moulded and vulcanised.
- Vulcanisation: This is when the tyre takes its final shape. During this stage, it is placed in a vulcanising press where heat and pressure act to bond the new tread to the tyre carcass.
- Final inspection: After vulcanisation, each tyre undergoes a thorough inspection to ensure the correct adhesion of the new tread, the absence of defects, and compliance with quality and safety standards.
The technical process of retreading is complex and must be carried out by experienced professionals equipped with the appropriate tools and machines. Adhering to this process ensures that the retreaded tyre is safe and ready for the road.
How to tell if a tyre is retreaded?
Retreaded tyres are usually marked with a specific symbol or code indicating that they have been reconditioned. In Europe, for example, you will often see the marking "retread" or "R" confirming that the tyre has been officially retreaded.
These markings can vary depending on the country and manufacturer. It is also important to note that retreaded tyres must meet safety standards set by authorities to ensure their reliability on the road.
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Why buy retreaded tyres?
The main argument in favour of retreaded tyres is undoubtedly the savings they allow. If we compare the costs with new tyres, the calculation is quickly made: retreading can save up to 40% of the price of a new tyre. And this without sacrificing quality, as the retreading process gives a second life to the tyre in compliance with current standards.
Besides the savings, the ecological aspect of retreaded tyres is a point that deserves our full attention. The manufacture of a new tyre requires a large amount of natural resources, including oil and energy. Retreading, on the other hand, significantly reduces the carbon footprint while reducing waste related to the disposal of tyres. According to various studies and statistics, retreading saves thousands of litres of oil and several tonnes of rubber per tyre. By choosing retreaded tyres, you are directly contributing to environmental preservation.
Are retreaded tyres allowed?
Yes, retreaded tyres are allowed, without a doubt. In many countries, retreaded tyres are not only allowed but also encouraged due to their economic and ecological benefits. They are subject to strict standards that ensure their safety and performance.
In Europe, retreaded tyres must comply with the same regulatory directives as new tyres. They are tested according to rigorous criteria and must bear the "E" mark indicating their compliance with European standards.
Are retreaded tyres less durable than new tyres?
Retreaded tyres are designed to offer performance comparable to that of new tyres, provided they are properly maintained and come from trusted manufacturers.
Insa Turbo and Blackstar are two reputable tyre brands in retreading.
What is a remanufactured tyre?
The world of remanufactured tyres offers yet another dimension of sustainability and economy in the tyre industry. Although often used interchangeably with retreaded tyres, remanufactured tyres follow a process of their own that deserves to be distinguished.
A remanufactured tyre, like the retreaded tyre, comes from the reuse of the structure of a worn tyre. The major difference lies in the extent of the remanufacturing process, which generally goes beyond classic retreading. Indeed, in addition to replacing the tread, remanufacturing can include the renovation of other parts of the tyre, such as the sidewalls or the internal part.
The remanufacturing process is similar to that of retreading in its main lines, but it can be more comprehensive and sophisticated, depending on the condition of the tyre and the manufacturer's specifications. It starts with a thorough inspection of the carcass and may involve more extensive repair of damaged areas. As with retreading, the expertise of technicians and the use of state-of-the-art equipment ensure the quality and reliability of the final tyre.
What is the lifespan of a retreaded or remanufactured tyre?
The lifespan can vary depending on the quality of the retreading, the use, and the maintenance of the tyre. On average, it can be similar to that of new tyres, with good maintenance practices.
