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Black sidewall trailer tire, 225/75R15, 12-ply, all-season highway tread

Trailer Master

Trailer Master ST PRO+ 225/75R15 121/117M F 12 Ply DT tire

SKU CH-5T3S-Q8RZ8

Highway all-season trailer tire rated for 81 mph with 12-ply load-range F durability

  • Seasonal useAll-Season
  • Intended vehicleSpecial Trailer Service
  • Tire load index121/117
  • Tire speed ratingM
  • Package height8
  • Package length27
  • Highway-rated up to 81 mph for steady towing
  • All-season compound with M+S rating handles wet and dry roads
  • 12-ply Load Range F construction supports heavy trailer loads
  • 10/32" tread depth promotes extended wear life
  • 225/75R15 size fits 15" rims with 28.3" overall diameter

Trailer Highway All-Season Tire

The Trailer Master ST PRO+ is a highway terrain, all season tire built specifically for trailer service. It carries a 225/75R15 size with a 121/117 load index and speed rating M for up to 81 mph. The 12 ply load range F construction is designed for special trailer applications only and must not be mounted on light trucks.

Sustained Load Durability

The reinforced internal structure and durable compound maintain the ideal tire shape under continuous load and driving pressure. This construction allows the tire to carry and withstand heavy loads over long distances without deforming. The optimized tread pattern and compound work together to resist irregular wear during extended highway use.

Upgrade from Lower Ply Ratings

This tire replaces models with lower ply ratings or load ranges that cannot match the 12 ply load range F capacity. The jump is worth it when your trailer demands the higher 121/117 load index for maximum weight carrying. Buyers who need a tire approved for light truck mounting should look elsewhere as this model is strictly for trailer service.

How it compares

Measured against everything we stock in ATV, Car & SUV Tires, at today’s prices. Recalculated every night.

Price $130.99
Pricier than about 77% of the 621 comparable items (median $87.99).

Specifications

Product
Brand nameTrailer Master
Display
Screen ratio75
Size & build
Package height8
Package length27
Package width27
Overall tire diameter28.3
Rim diameter15
Sidewall styleBSW: Black Side Wall
Size225/75R15
Tire size code225/75R15 121/117M F 12 Ply
Tire width225
Wheel diameter15 in (38.1 cm)
Tread depth10/32
Compatibility
Intended vehicleSpecial Trailer Service
Compatible vehiclesTrailer
More details
Seasonal useAll-Season
Tire load index121/117
Tire speed ratingM
Tire load rangeF (12 Ply)
Tire ply ratingF (12 Ply)
Run-flat capabilityNo
Tire categoryHighway

Questions about this item

How does the Trailer Master ST PRO+ handle heat buildup during long highway runs at its 81 mph speed rating?

The all-season compound and reinforced internal structure are designed to maintain shape under load and driving pressure, reducing heat-related wear during extended highway use.

What rim width and bolt pattern must my trailer already have to fit the 225/75R15 size?

This tire requires a 15-inch diameter rim; the exact rim width and bolt pattern depend on your trailer's hub, so verify those specifications before mounting.

Will the 12-ply load range F construction work with my older trailer axles rated for lower ply tires?

The 12-ply rating provides higher load capacity (121/117 load index); ensure your axle, hub and suspension ratings match or exceed this capacity before upgrading.

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