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Double Coin Trailer Tires: FT125+, RT500 & Complete Selection Guide

Why Trailer Tire Selection Matters
Trailer tires face unique stresses: scrubbing during tight turns, prolonged exposure to side forces, and — in many cases — sitting idle for extended periods. Unlike drive or steer tires, trailer tires spend their entire service life in free-rolling positions. This means the rubber compound, tread pattern, and casing construction must be optimized for specific demands:
• Fuel economy: Low rolling resistance trailer tires can reduce fuel consumption by 3-5%, adding up to thousands of dollars per truck annually.
• Safety at highway speeds: Trailer blowouts at 65 mph are a leading cause of jackknife accidents. Premium radial construction and proper load ratings are non-negotiable.
• Casing longevity: A well-built casing is the foundation for future retreading — Double Coin casings are engineered to withstand multiple retread cycles.
Double Coin Trailer Tire Lineup
Double Coin's trailer tire portfolio spans from super-wide SmartWay-verified models to specialty RV radials. Here's what you need to know about each model:
FT125+ — Super-Wide SmartWay Verified
The FT125+ is Double Coin's flagship super-wide trailer tire, designed to replace dual-tire configurations with a single tire per wheel position. This EPA SmartWay-verified tire reduces weight, improves fuel efficiency, and delivers outstanding tread life. The super-wide footprint distributes load more evenly across the road surface, reducing irregular wear and extending service life. Available in size 445/50R22.5, it's the go-to choice for weight-sensitive long-haul operations.
RT500 — All-Steel ST Radial for RV, Boat & Horse Trailers
The RT500 is specifically engineered for specialty trailer applications — RVs, boat trailers, horse trailers, and utility trailers. Unlike budget nylon-bias trailer tires, the RT500 features all-steel radial construction for superior heat dissipation, longer tread life, and better high-speed stability. Available in ST235/80R16 and ST235/85R16, it covers the most common RV and heavy-duty trailer sizes. The reinforced sidewall construction provides excellent lateral stability — critical for tall, top-heavy trailers.
RT600 / RT600+ — Premium Trailer Position Radial
The RT600 and RT600+ are workhorse trailer-position radials for regional and long-haul fleets. Featuring a five-rib tread design optimized for even wear and low rolling resistance, these tires are designed to maximize trailer axle performance. The RT600+ variant adds enhanced tread depth for extended mileage, making it ideal for high-utilization fleets running 100,000+ miles annually. Both models feature Double Coin's deep tread compound technology for resistance to cutting and chipping.
FR610 — Free-Rolling Trailer Radial
The FR610 is a dedicated free-rolling trailer tire with a shallower tread depth optimized for fuel economy. If your trailer spends its life in the trailer position — never doing the work of drive or steer axles — the FR610 delivers maximum miles per gallon without sacrificing reliability. The optimized tread compound resists weather checking and ozone cracking, making it suitable for trailers that sit for extended periods between trips.
TR100 — Heavy-Duty Trailer Radial
The TR100 is built for severe-service trailer applications — dump trailers, flatbeds hauling construction materials, and heavy equipment transport. The aggressive tread pattern and reinforced casing handle the abuse of loading docks, construction sites, and uneven terrain. Deep tread depth and cut-resistant compounds mean fewer tire-related delays in demanding environments.
Trailer Tire Comparison at a Glance
Model | Best Application | Key Feature | SmartWay |
FT125+ | Long-haul super-wide | EPA SmartWay verified | Yes |
RT500 | RV/Boat/Horse trailers | All-steel ST radial | No |
RT600/RT600+ | Regional/long-haul trailer | 5-rib even wear design | No |
FR610 | Free-rolling economy | Fuel-optimized compound | No |
TR100 | Severe-service trailer | Cut-resistant compound | No |
Trailer Tire Best Practices
Getting the most from your trailer tires isn't just about choosing the right model — proper maintenance is equally critical. Follow these guidelines to maximize tire life and safety:
• Maintain correct inflation pressure: Underinflation is the number one cause of premature trailer tire failure. Check pressure when tires are cold — at least once per trip for RVs, weekly for commercial fleets.
• Watch the speed rating: Most ST-rated trailer tires have a maximum speed of 65 mph. Exceeding this — especially in summer heat — dramatically increases blowout risk. Double Coin's all-steel radial construction provides an extra safety margin.
• Replace on age, not just tread wear: Even if tread depth looks adequate, trailer tires should be replaced every 5-7 years regardless of mileage. UV exposure and ozone degrade rubber compounds over time.
• Rotate trailer tires: Trailer tire rotation is often overlooked but is essential for even wear. Cross-rotate on tandem axles to balance tread life across all positions.
• Match axle alignment: Misaligned trailer axles cause rapid, uneven tire wear. Include alignment checks in your preventive maintenance schedule — it pays for itself in extended tire life.
Why Buy Double Coin Trailer Tires from Goldtop?
As an authorized Double Coin distributor, Goldtop provides the complete range of Double Coin TBR tires at factory-direct pricing with global shipping options. Our team can help you select the right trailer tires for your specific application — whether you need a single set for a boat trailer or a full fleet spec for 50 trucks.
Double Coin's recent Thailand manufacturing expansion and nationwide distribution partnership with ATD ensure consistent availability and competitive pricing across all product lines.
Need Double Coin tires? Contact Goldtop — authorized distributor with competitive pricing and global shipping.