Bias And Radial Skid Steer Tires – Diagram, Cutouts

Construction Skid Steer Tire Features


Bias Skid Steer Tire

  1. Tread
  2. Carcass
  3. Breakers
  4. Bead

Bias Belted Skid Steer Tire

  1. Tread
  2. Carcass
  3. Belts
  4. Bead

Radial Skid Steer Tire

  1. Tread
  2. Carcass
  3. Belts
  4. Bead


Basic Tire Design

Earthmover tires are produced in three basic constructions:

  • Bias
  • Bias/Belted
  • Radial

All share a common nomenclature.


The part of the tire in contact with the ground. It must provide traction, long wear and cut resistance. The tread depth and design vary based on site and application.


Contains the inflation medium. The greater its strength, the greater the pressure it can hold. Bias and bias/belted tire carcasses use many angled plies of fabric to achieve strength. Radials have one ply of steel wire.

Breakers (belts)

These are placed between the tread and carcass. They help to join these parts. They also distribute road shock to protect the carcass. In bias/belted and radial constructions, they control the diameter of the tire. They also impart superior tread impact and penetration resistance.


Bundles of high tensile steel wire. They anchor the tire to the rim. Bias and bias/belted tires may have several bead bundles. Radials have one large bead bundle.


The protective rubber cover on the side of a tire. The rubber is compounded to flex without cracking. It also resists cuts and forms a barrier to protect the carcass from the weather.

Inner Liner

A specially formulated rubber compound inside the tire that minimizes permeation. It works with the rim and O-ring to contain the inflation medium in tubeless designs.

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