Evolution Wheels EWRS-PIVOT airless tires are designed with what we call core holes. Core holes are open-ended holes in the rubber of the tire that help it compress like a pneumatic tire naturally would but without the bounce. Each tire is designed with a specific core hole shape to best suit the tire’s needs.
EWRS-PIVOT Irrigation Tire Core Hole Design
The conditions that pivot tires operate in are hard on the tires and added weight from mud stuck to a center pivot irrigation system can bog it down and cause stoppages. Therefore, we designed the cores on the EWRS-PIVOT to completely compress and be self-cleaning. Each segment of the tire has two cylindrical holes on each side connected with an open rectangle (See pictures below). These cores are designed to compress completely when pressure is applied so that the mud and material that get stuck inside will be squeezed out.
Airless Cored Pivot Tire VS. Pneumatic Pivot Tire
Evolution Wheel’s EWRS-PIVOT airless pivot tire is meant to act much like a pneumatic but without the bounce. A pneumatic tire is designed to compress when pressure is applied but the problem that can arise is they bounce and cause damage to the center pivot irrigation system in certain situations. The EWRS-PIVOT does not have this bounce. The bounce is created when you have compressed air in the tire pushing against the pressure applied. Being an airless tire, there is no compressed air and therefore, no bounce.
The EWRS-PIVOT series of airless pivot tires from Evolution Wheel offers the most advanced airless technology to the irrigation market. This solution delivers serviceability, traction, and floatation into one impressive offering.
Our tread design and tire profile offer greater traction through mud and obstacles. The unique concave contact face helps eliminate rutting by keeping dirt under the tire, where it belongs. The face of the tire is pointed inwards. Compared to typical pneumatic irrigation tires which convex shape push mud out from under the tire, causing ruts.
Our proprietary segmented design bolts onto our high-strength wheel, allowing you the ability to service the tire quickly, eliminating the need to change a tire in the field.
Unlike other airless pivot tires, the EWRS-PIVOT compresses flat pushing material out, it's a self-cleaning system. The compressed cores elongate the footprint of the tire allowing it to wrap over obstacles increasing traction and reducing ground pressure.
