Super Cargo tires

How to Choose Super Cargo Tires

Choose Super Cargo tires by deciding on the application - trailer axle, commercial truck axle, or on/off-highway service - before looking at sizes. The brand's catalog contains no passenger or consumer tires.

• For trailer applications, the core of the lineup. The ST Radial is the general-purpose radial trailer tire for utility trailers, boat trailers, campers, and livestock haulers, available in load ranges C, D, and E to match different gross trailer weights. The SC126 and SC129 step into heavier all-steel radial construction in the 16-inch rim diameter range, suited to larger fifth-wheel and tandem-axle trailers where load capacity is the primary concern. The ST701A covers larger commercial trailer sizes in the 20-inch rim diameter range. The ST702 and ST705 are additional trailer-position models within the same family. The LQ225 is a bias-ply trailer tire - not a radial - designed for 14.5-inch rim diameter fitments found on certain commercial utility and equipment trailers; it should not be mounted on light trucks.
• For commercial truck service, the SC039 is a drive-axle tire for semi-trucks and buses in regional and long-haul highway service, with a closed-shoulder tread design aimed at controlled wear under load. The SC105 covers trailer-position commercial sizes at 16-inch rim diameters. The SC211 handles Class 8 highway duty in 22.5-inch rim fitments. The SC516 targets on/off-highway construction and lug-pattern applications. The SC528 covers mixed on/off-highway traction duty. The DC-2 and ST627 round out the commercial side of the catalog.
• For construction and mixed-surface use, the H186 ST BIAS is a bias-ply construction tire rather than a radial, built for equipment and applications where bias construction is specified - a distinct choice from the radial commercial truck models and not interchangeable with them.

The selection sequence is: confirm trailer versus truck versus construction use → identify the axle position and rim diameter → match the load range or ply rating to the gross weight requirement. Load range confirmation is critical across all Super Cargo models — the same nominal size appears in multiple ply ratings with meaningfully different weight limits.

Popular Super Cargo Tire Sizes for Trailers & Commercial Vehicles

• ST205/75R15 - the most widely distributed Super Cargo trailer size, available in the ST Radial in D (8-ply) and E (10-ply) load ranges. Common on single-axle utility trailers, small boat trailers, and light cargo haulers.
• ST225/75R15 - a wider 15-inch trailer fitment in the ST Radial line, used on mid-capacity tandem-axle trailers where a larger contact patch improves stability under load.
• ST235/85R16 - the dominant 16-inch heavy trailer size, present in both the ST Radial and SC126 all-steel lines in E and G load range configurations. Common on fifth-wheel trailers and heavy tandem-axle equipment trailers.
• ST225/90R16 - a taller 16-inch trailer fitment appearing in the SC105 and SC126 ranges in G (14-ply) construction for demanding towing applications with high per-axle weight requirements.
• 11R22.5 - the Class 8 commercial truck size in the SC211 range, covering highway steer and drive positions in H (16-ply) construction for fleet and long-haul applications.

All Super Cargo sizes carry ST (Special Trailer) or commercial designations - there are no P-metric passenger fitments in the catalog. Buyers should verify gross trailer weight against the tire's load capacity at the correct inflation pressure before selecting a load range, as undersizing the load range relative to actual trailer weight is the most common fitment error with trailer tires.