One of the main challenges facing mine operators today is how to reduce the cost per tonne by improving operational efficiency, thus increasing profitability, but without compromising safety. 
 
With this in mind, tyre manufacturer Michelin has unveiled its new XDR3 tyres, designed for rigid dump trucks operating in surface mines. Available in 40.00 R 57 and 53/80 R 63 sizes, the new tyre is said to increase tyre life by a minimum of 10 per cent when compared to its predecessor, the XDR 2.

 
According to Michelin, the new tread pattern on the XDR3 tyres offers better endurance due to improved heat dissipation capabilities – 8°C cooler in the tread area. A greater volume of tread rubber is in contact with the ground which improves wear and ensures better load distribution throughout the contact patch due to a lower pressure. Also, interlocking shoulder blocks resist excessive movement during cornering which further reduces tyre wear.
 
A new mixing process ensures a more uniform composition of rubber compounds and a superior level of carbon black dispersion that increases wear resistance. Each unique compound offers specific performance characteristics adapted to site conditions and usage, from high wear resistance to high thermal capacity for speed.
 
The high-strength steel cables used in the tyre’s casing are 10 per cent stronger than in the XDR2 and are encapsulated in rubber to prevent the spread of corrosion within the casing, which extends the life of the tyre.
 
Michelin’s XDR3 is also MEMS1 ready, meaning it is possible to quickly and easily install state-of-the-art data sensors to capture and transmit temperature and pressure information in real time.
To ensure it fully meets their customers’ needs and expectations, Michelin’s R&D teams carried out extensive testing on the new tyre over a six year period – travelling more than 25 million kilometres, the equivalent of circling the earth 625 times.
The 40.00 R 57 XDR3 is available from September 2016 and the 53/80 R 63 from January 2017.