Factory Trained Technicians
Free Road hazard coverage
All Inclusive Pricing
National Brands
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Trailer Master ST Pro plus
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42% off
as low as ???.??/tire with
SimpleScore™
Our proprietary rating system
for the modern tire buyer.7.1
Good
Score breakdown:
7.2
Long lasting
Good
7.1
Handling
Good
7.2
Traction
Good
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Our factory-trained technicians know your vehicle inside and out, so you get the right fit, every time, guaranteed
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Save your wallet from road hazards like nails.
All Inclusive Pricing
The price you see is the price you pay, including installation. Mounting, balancing, and disposal are all included, with no unexpected price jumps at checkout.
National Brands
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Get technical:
The Trailer Master ST PRO+ is trailer tire that's designed to haul toy, boat, RV, horse, and other trailers. With a specialized tread design and rubber compound, the Master ST PRO+ provides traction and performance year-round. In addition, the Master ST PRO+ has a reinforced internal structure that increases load-carrying capacity and durability.
Features & Benefits
- Designed for use on trailers; not approved for use on passenger vehicles
- Ribbed tread pattern provides traction and performance year-round
- All-season rubber compound keeps the tire pliable in varying temperatures
- Wide circumferential grooves resist hydroplaning by channeling water and slush from the footprint
- Reinforced internal structure improves the overall load-carrying capacity and durability

Vehicle |
Mileage Warranty N/A |
Load Index 3968 lbs/3527 lbs (128/124) |
Max Speed 87 MPH (N) |
Load Range G (14 Ply) |
Sidewall Blackwall |
Inflation Pressure 110 PSI |
Part Number TMST21 |
Tread Design Symmetrical |
Tire Weight 93 lbs |
Section Width 8.65" |
Rim Range 6.0-7.0" |
Overall Diameter 31.8" |
Any info you'are still looking for? |
ST Pro plus ST225/90R16