Large equipment, such as loaders, is a big part of most construction jobs. They are versatile, being used in many different projects. Loaders are used from general construction work, snow removal by municipalities, landscaping, building roads, and loading dirt and rock at quarries. They are also used in more severe applications like waste haul landfills and various mines. Because of the many differing environments, it is important that the equipment is fitted with the proper tires to handle the jobs they will be performing.

EARTHMAX SR 30 (E-3/L-3)


The Tire and Rim Association (TRA) classify loader tires based on tread type and depth. Tread types are designed for differing applications from smooth, regular terrains to rocky, snowy, and severe mining environments. They are classified from L-2 to L-5’s. “S” designations represent smooth treads.

  • L-2 maximum traction for softer conditions
  • L-3 is used in general applications with more durability and resistance
  • L-4 is a deeper tread for durable wear and extended tire life in rocky conditions
  • L-5 provides the deepest tread for the toughest applications with chip resistance and extreme durability
  • L2/L3 are considered standard depth
  • L4 are 150%, or 1-1/2 times deeper
  • L5 are 250%, or 2-1/2 times deeper


BKT has a full line of loader tires designed for every type of job from light to severe applications. BKT designs both bias and radial tires for loader applications. Radial tires have a flexible casing which provides a smoother ride, yields less cuts, and lower heat generation. Radials also have a more consistent shape for longer tread life, and better traction and flotation. Bias tires have a stiffer carcass which leads to increased lateral stability, keeping the bucket more stable. Bias tires are also more economical.

The XL Grip is a bias tire with an L-3 code for heavy duty loading operations. It has a wide base and excellent traction designed to minimize cuts and punctures.

The EARTHMAX SR 22 is an all-steel radial tire with an L-2 large, non-directional tread designed to operate in extreme winter conditions in ice and snow. It is also made for dozer and grader applications. The traction provides excellent stability.

The EARTHMAX SR 30 is an L-3 radial tire that is excellent harsh conditions, but also perfect for everyday use. It has multi-layer steel belts with a cut resistant compound and a rigid block pattern for stability and durability. It is dual purposed for dump trucks, too. 

The L-4 EARTHMAX SR 41 all-steel radial tire has a special block pattern to provide extra resistance to punctures with the addition of a cut resistance compound. It is also purposed for dump trucks and dozers and can be used for long working hours without downtime. The deep traction provides extra durability in severe conditions.

For severe, rocky conditions, like underground mines, quarries, and scrap yards, the EARTHMAX SR 53 has an L-5 extra deep tread design. The cut resistant compound and traction provide extra stability and extended wear life. This radial tire is also designed for dozers and low-profile dump trucks (LPDT). 

XL GRIP (E-3/L-3) w


With so many different tires and applications, it is important to assess the situation and environment in order to choose the proper tire. All contractors want tires that perform at maximum efficiency and last as long as possible, to provide them the best return on their tire investment. Choosing the right tire is a big part of any contractor’s bottom line. BKT has a trained sales and technical staff that can assist in determining the best choice for the job and equipment. 

For More Information

For more about BKT and its loader tire lineup, visit

Modern Contractor Solutions, May 2021
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