An OTR (Off-The-Road) wheel rim is a type of heavy-duty wheel rim designed for use in industrial and off-road applications, such as mining, construction, agriculture, and forestry. These rims are used to mount large off-road tires and are typically made of high-strength materials, such as steel or aluminum, to withstand the heavy loads and harsh operating conditions.

OTR wheel rims come in a variety of sizes and configurations to fit different types of off-road vehicles and equipment, including loaders, excavators, dump trucks, and graders. They can be tubeless or tube-type, with tubeless designs becoming more popular due to their lighter weight and improved performance.

When choosing an OTR wheel rim, it's important to consider factors such as load capacity, bolt pattern, and overall dimensions to ensure a proper fit and safe operation. Proper maintenance and inspection are also essential to ensure the longevity and performance of the wheel rim and tire assembly.