Tyre Design related Failure problems .
Over the years there have been a few problems from Tyre OEMs with Mould Design and Tyre Construction . These problems are accentuated with Tier 2/3 Manufactures who are still trying to develop the Art , Science and Philosophy of designing a product that will work .
Some basic mistakes , have and are still being made with Mould/Tyre Dimensions , Mould/Tyre Profiles , Tread Pattern Design and poor Tyre Construction . These poor Design Philosophies can become costly issues.
Mould Dimensions : This issue is controlled by International Standards such as the American Tyre and Rim Association (T&RA) , the European Tyre and Rim Technical Organisation (ETRTO) and the Japan Automobile Tyre Manufacturers association ( JATMA) . These bodies are in existence to create some uniformity in the tyre industry . Engineering Guidelines provide the basis for Designers to determine tyre dimensions which are compatible with other brands for tyre matching purposes .
Pictures : Basic Radial Tyre Design - Construction and Mould
Pattern Development : There are Fundamental Features that need to be taken into consideration when designing any Tread Pattern . Along with tyre Dimensions and Tread Profile it is also very important to get Tread Rubber distribution correct . To get the best Wear Profile and Heat Distribution across the tread face , Groove profiles , Groove Inclinations and Tread Sipe Configurations are important aspects to be taken into account .
Mould Profile : Over the years Tyre Manufacturers have developed their own Design Philosophies in regards Mould Design , which is an integral part of their Tyre Design or Construction thinking . Getting this design aspect right is absolutely crucial for Tyre performance optimization .
Heavy Duty Construction : A tyre construction that adds additional weight to a product limits its TKPH capability . Tyre Weight is one of the worst enemies for a tyre . To achieve a higher TKPH performance specification a Light Weight Construction is one solution , apart from compound changes .
What happens if Designs go wrong .
Depending on what the Tyre Design issue is , it could result in any one of the following tyre conditions in service :-
Poor Tyre Wear Profile - Excessive Crown or Shoulder wear,
Localized Heat Separation - Compound Reversion or de-polymerisation.
Casing/Belt Rubber Fatigue - Rubber break down between cords .
Tyre Matching Policy - Dimension difference limits users fitment policy.
Sometimes tyre failure can be a result of a combination of these removal reasons . OEMs can be quick to make Operating Conditions the target , and it can be hard to disprove the matter if no competitor brands are running concurrently with the problematic tyres .
Remember the Benchmark indicator should always be the best performing tyre brand .