Carlisle Farm Specialist Tractor Bias Features and Benefits: - Versatile terrain traction - Upgraded load durability - Longer service life Description: The Carlisle Farm Specialist Tractor Bias is an all season tire made for tractors. This tire has a BIASED ply structure. Manufacturers only provide the width and rim diameter with these tires. Various brands and models will have discrepancies. The Overall Diameter advertized represents the overall diameter in inches, once it has been inflated and mounted.