ST vs. LT tires
ST (Special Trailer) tires are engineered specifically for trailer axles — stiffer sidewalls to resist trailer sway, built for the different stress pattern of a towed axle versus a drive axle.
Owner guide
Best RV Tires — Buying Guide
Tire choice on an RV or trailer isn’t just about brand — it’s about matching the tire’s category, load range, and speed rating to how the vehicle is actually built and used.
Active corridor: Montana · Wyoming · Idaho · Washington — case-by-case beyond.
Field notes
Tire choice on an RV or trailer isn’t just about brand — it’s about matching the tire’s category, load range, and speed rating to how the vehicle is actually built and used. ST (Special Trailer) tires are engineered specifically for trailer axles — stiffer sidewalls to resist trailer sway, built for the different stress pattern of a towed axle versus a drive axle. LT (Light Truck) tires are built for powered, steered axles on motorhomes and tow vehicles, where the load and stress patterns differ from a trailer’s.
Load range and matching the axle rating
Load range (a letter rating like C, D, or E) indicates the tire’s maximum load capacity at a given pressure — it needs to meet or exceed your axle’s GAWR, not just “seem about right” compared to the old tire.
Our Picks
Budget: Carlisle Radial Trail HD — a longtime standard trailer replacement tire, widely stocked.Best Overall: Goodyear Endurance — purpose-built for trailer axles, a common upgrade from OEM trailer tires for better he.
When to book
DIY ends at sealed systems, gas work, and inverter commissioning. Diagnostic $175 applied toward repair.
Related: All guides · Book a Service · Pricing
Pricing teaser
Trip fee $75 within 30 miles, then $1.50/mi. Labor ~$150/hr (1-hour minimum, billed in 30-minute increments). Diagnostic $175 applied toward repair if you proceed.
Active corridor: Montana · Wyoming · Idaho · Washington — case-by-case beyond. Credentials (text): Victron Professional Certified Installer · weBoost Authorized Installer · Peplink Certified Associate · Dometic Professional Certified.