Appropriate tyres straight from the factory

09.05.2012
Valtra’s unique customer order system covers not only tractors but also tyres, allowing each customer to select tyres that are most suitable for the intended task.
Valtra’s unique customer order system covers not only tractors but also tyres, allowing each customer to select tyres that are most suitable for the intended task.
“Almost 50 percent of our tyres are Continentals and 40 percent Michelins. The remaining 10 percent are Trelleborgs and Nokian Tyres,” says Tiina Savolainen, who is in charge of tyres at Valtra.

A wide selection of sizes are available, from narrow tyres for row crop operations to 710 mm turf tyres. Similarly, customers can select from different tread patterns, such as agricultural tyres with lugs or industrial tyres, and construction – cross-ply or radial tyres.
“Almost half of the tractors leave the factory with low profile and wide 65 and 70 series tyres. Cross-ply and other forestry tractors account for approximately 5 percent of the tyres we supply. Industrial tyres account for around 4 percent,” Tiina says.

Trend towards wider tyres with high speed ratings
Tyres often account for 6 to 9 percent of the total price of the tractor. Since it is not possible to combine all the optimal properties in a single tyre, all tyres are a compromise between grip, durability, comfort, speed and ground compaction.

The current as road driving is more common and ground compaction is a challenge everywhere. The contact area of radial tyres is around 10 to 15 percent larger than that of similarly sized cross-ply tyres.

When the time comes to change tyres it is important to check tyre specifications in the operator’s manual. Professional tyre dealers may also be consulted for technical information such as calculating speed ratios between front and rear tyres.


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