275144 - Miller Trailer Tire and Rim Assembly ST175/80D13

Genuine Miller Replacement Running Gear

The Miller 275144 Tire, w/ Rim ST175/80D13 is a specialized replacement component designed to keep your mobile welding operations moving safely and efficiently. As a genuine OEM part, this assembly is engineered to meet the specific load-bearing and towing requirements of Miller welding generator trailers. When transporting heavy industrial equipment like the Bobcat, Trailblazer, or Big Blue series welders, the integrity of your running gear is paramount. This product provides a complete solution, featuring both the tire and the steel rim pre-assembled, allowing for a straightforward removal and replacement process without the need for specialized tire mounting equipment.

Understanding the ST175/80D13 Specification

The alphanumeric code on this tire provides critical information about its construction and capabilities. The "ST" prefix stands for "Special Trailer," indicating that this tire is specifically designed for trailer axle positions and is not intended for use on passenger vehicles or steering axles. ST tires are constructed with stiffer sidewalls to reduce trailer sway and handle higher load capacities compared to passenger tires of similar size. The "175" refers to the section width of the tire in millimeters, while "80" represents the aspect ratio, meaning the sidewall height is 80% of the width. The "D" indicates a diagonal or bias-ply construction, which is favored in heavy-duty trailer applications for its durability and stability under load. Finally, "13" denotes that this tire fits a 13-inch diameter rim.

Maintenance and Safety

Maintaining the tires on your welding trailer is just as important as maintaining the welding machine itself. A blowout or tire failure while towing heavy equipment can result in significant downtime, damage to the machine, or safety hazards on the road. Regular inspection of your trailer tires for dry rot, tread wear, and proper inflation pressure is essential. If your current tires are showing signs of age or damage, the Miller 275144 offers a direct, reliable replacement to restore the roadworthiness of your equipment. Because this unit comes with the rim, it eliminates concerns about bent or rusted existing rims compromising the seal or safety of a new tire.

Application and Fitment

This tire and rim assembly is typically found on highway trailers and running gear packages manufactured by Miller for their engine-driven welder-generators. Due to the variety of trailer configurations over the years, it is highly recommended to verify fitment using your machine or trailer's serial number. Using genuine Miller parts ensures that the bolt pattern, offset, and load rating match the original engineering specifications of your towing setup.