The manufacturer of rayon with the brand name Cordenka has tested and compared various materials and assessed their suitability for use in passenger car tires. They performed tests simulating all stages in the life of a tire’s carcass, from production to long use in practice. The test results once more confirm beyond doubt that rayon is better than polyester or polyamide. Rayon’s constant dimensional stability is a guarantee for quality from the beginning to the end of a tire’s life. It means: • perfect roundness (rolling comfort) • best track stability (steering properties), and • constancy up to the last mile Perfectly round quality tires are obtained through low elongation (high modulus) and no or very low shrinkage. Rayon owes its resistance to heat and stress to its cellulose origin. The material is thermally stable. Based on oil, polyester and polyamide are thermoplastic and are therefore affected by heat and stress. They show higher shrinkage, higher elongation, and more creep. The only synthetic fiber that – like rayon – is also insensitive to heat and stress is aramid. However, the use of aramid in the carcass of passenger car tires is relatively expensive and its high strength is not necessary there. Rayon amply meets all the requirements. Experienced and skilled motorists place high demands on comfortable, vibrationless driving and direct steering. They want to be sure of these qualities at any time or place. That is why they use rayon tires. The tire says it all. A very low elongation during motion (high dynamic modulus), when the tire must perform well in all sorts of conditions, has a favorable effect on the car’s steerability. Rayon performs by far the best, staying constant over time, no matter how hot the tires become. Even after a long journey in smothering heat with a heavy load. Rayon keeps its length. It does not ‘creep’ or ‘grow.’ That is why the carcass always retains its original shape. Consequently, the rolling and steering characteristics of the tire stay the same, even under exacting conditions. And this will be true for the entire life cycle. IF YOU WANT QUALITY, CHECK WHETHER IT SAYS R

Cars have become an essential part of our lives and, indeed, have developed into more than just a means of transport. Therefore, demands set for cars are high. Over the years, a stronger focus has been placed on safety aspects and new technical developments and models have been following each other rapidly. Cars are becoming increasingly comfortable, luxurious, and technically advanced. Yesterday's optional features are today's standard and there is a wide variety of accessories available to cater for individual wishes. After all, a car should not just be reliable, it should also be a joy to...