Sotera tires

How to Choose Sotera Tires

Choose Sotera tires by identifying axle position and service duty before comparing sizes. The model naming system is the most useful starting point for any selection decision - each prefix encodes a specific role.

The full current lineup covers nine models: STD-1, STD-1 Plus, STD-2 Plus, STH-1 Plus, STCC-1 Plus, STO-1 Plus, STT-1 Plus, STT-2 Plus, and Viatus. The letter codes map directly to axle function:

• Drive-position tires (STD series) are built for the powered rear axles of trucks and buses. STD-1 Plus cover on-highway drive service, with large angled tread blocks and a closed-shoulder design to manage even wear under load. The STD-2 Plus targets a similar duty with an all-steel construction, available in both standard commercial sizes and the smaller 19.5-inch rim diameter common on medium-duty trucks and delivery vehicles.
• Highway and steer tires (STH series) are designed for steer axles and general on-highway running. The STH-1 Plus uses a ribbed footprint with wide drainage channels, suited to all axle positions when the operating environment is primarily paved highway rather than demanding drive-axle service.
• Mixed-service and all-position tires (STCC, STO series) cover applications where a single tire must perform across steer, drive, or all-position roles. The STCC-1 Plus is specifically documented for dump truck and mixed-service use: an important distinction, since running a dedicated drive tire in mixed service or vice versa affects wear patterns and service life. The STO-1 Plus fills a similar all-position slot for general commercial fleet use.
• Trailer tires (STT series) handle the separate demands of free-rolling trailer axles, where load capacity, even wear, and casing stability under lateral forces matter more than traction. The STT-1 Plus and STT-2 Plus are both trailer-position models with all-season compound construction.

The practical decision path is: confirm the axle role → match the model prefix → select the size and load range for the application. Sotera's naming is functional, not cosmetic, and treating models as interchangeable across service roles is the most common mismatch error with this brand.

Popular Sotera Tire Sizes for Commercial Trucks & Trailers

Sotera's size range is entirely commercial - no passenger or light-truck fitments appear in the current catalog.

• 11R22.5 - the primary Class 8 fleet size, present across the STD-1 Plus, STD-2 Plus, STH-1 Plus, and STCC-1 Plus lines in load range G and H configurations for both drive and steer positions.
• 11R24.5 - the other dominant Class 8 size; available across the same drive and highway model families, typically in 16-ply H-range construction for heavy-load long-haul and regional service.
• 295/75R22.5 - the metric equivalent covering the same Class 8 applications as 11R22.5; appears in the STT-1 Plus trailer range as well as drive and steer positions, making it one of the more versatile sizes in the Sotera catalog.
• 225/70R19.5 - a medium-duty commercial size specific to the STD-2 Plus drive lineup, common on single-axle straight trucks, delivery vehicles, and regional fleet applications that run 19.5-inch wheels rather than the standard 22.5.
• 245/70R19.5 - a wider 19.5-inch fitment also found in the STD-2 Plus range, used on medium-duty trucks where additional load capacity or a wider footprint is needed at the same rim diameter.

Sotera operates entirely within commercial and trailer sizing. Load range confirmation is as important as size: the same rim diameter appears in G (14-ply) and H (16-ply) variants across the lineup, and selecting the wrong load range for the axle weight invalidates the fitment even when the size is correct.