How Pivot Tire Sizes Affect Wheel Ruts
Let’s talk about pivot tire sizes. There are lots of different sizes of pivot tires on the market that you can choose from. The two main factors are the height and width of the tire.
Pivot Tire Width
Pivot tires are usually made with a wide 14.9” width. This is because pivots often create massive wheel ruts in which tires get stuck and risk damaging your system. The larger width increases the surface area which in turn spreads the weight over that larger area, helping with floatation.
Pneumatic pivot tires are the industry standard. A pneumatic tire compress and flexes when weight is applied increasing the surface area further aiding in floatation and traction. However, they also have a convex profile. This refers to the rounded shape where the peek is in the center of the tire. Because of this convex profile, the tire doesn’t truly have 14.9” of ground contact. The edges of the tire are curved up and will push mud and material to the sides pilling it on the edges of the track.
Pivot Tire Height
Many irrigation farmers prefer to use tires with a smaller width of 11.2” sacrificing floatation and combating it by increasing the standard pivot tire rim Diameter of 24” to 38”. A smaller width will decrease crop damage and will make pivot tracks narrower, and they will be able to go deeper without issues.
These taller pivot tires have the same issues with the shape as the wider 14.9" tire. Where the shape largely contributes to wheel rut formation in the first place.
The EWRS-PIVOT Tire
The EWRS-PIVOT airless irrigation tire is designed with a concave true-to-spec 14.9” x 24” profile that is truly 14.9" of total ground contact and holds mud underneath the tire to maximize floatation. The rubber is designed with core holes that compress to mimic the flexibility of a pneumatic tire and the aggressive bi-directional tread pattern maximizes traction.
Due to the EWRS-PIVOT being an airless tire, there is no chance of a tire going flat in the field. another feature the EWRS-PIVOT has is that it is segmented. Each segment is bolted to the rim allowing the owner to service the tire if needed by simply switching the damaged segment with a new one only using a ¾” wrench.
Evolution Wheel’s EWRS-PIVOT series minimizes the time spent in the field dealing with these issues. Using a tire that is low maintenance and prevents tracks from forming saves you the time, energy, and money spent with dealing with wheel ruts.
EWRS-PIVOT SERIES
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.
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