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September 10, 2013 12:00 AM

Trelleborg developing 'progressive' traction tire

ERJ Staff
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    ERJ staff report (TB)

    Tivoli, Italy – Trelleborg Wheel Systems S.p.A. has developed a "double-lug" tread pattern for its farm tractor drive tires, reports Tire Business, that the company claims delivers "progressive" traction under varying soil conditions while offering improved flotation.

    The design concept, to be marketed under a "ProgressiveTraction" moniker, will debut at the Agritechica 2013 farm industry trade show in Hannover, Germany, 10-16 November.

    Trelleborg said the idea, under development for the past two years, is still in the concept phase. The first tires, in size 650/65R38, are now undergoing field testing.

    Piero Mancinelli, R&D director, Trelleborg agricultural and forestry tires, said the design concept is targeted at the new generation of tractors and transmissions that offer more power and torque.

    "To cope with these requirements, agricultural tires have been growing both in terms of width and overall diameter, becoming larger and larger," Mr. Mancinelli said. "The ambition of 'ProgressiveTraction' technology is to increase tire efficiency and performance by simultaneously working on the tire's dimension while re-engineering the traditional tread."

    Trelleborg said the new tread features a double lug that operates on soil at different times, progressively releasing higher traction when and where needed.

    The new tread is characterised by a double lug that operates on the soil at different times, progressively releasing higher traction when and where it is needed, Trelleborg said. The double lug also provides the tire with better floatation capability, ensuring an even pressure distribution over the extra wide footprint.

    The concept is undergoing a variety of indoor and outdoor field tests to measure and benchmark product performance, both in the field and on the road, Trelleborg said.

    During the latest field tests, Trelleborg claims concept tires demonstrated 10-percent higher traction capacity vs. standard technology tires, and the extra pulling force yielded a 3- to 5-percent reduction of working time.

    The tire also can provide increased flotation, Trelleborg said, depending on the tractor and tire configuration, potentially boosting crop yield while preserving soil from compaction and erosion.

    On the road, the new lug structure is designed to limit tread vibrations, reducing the tire's rolling resistance, which should yield improvements in fuel consumption, driver comfort, handling and wear.

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