You're viewing new Toyo Open Country R/T Pro Tire | 38X13.5R20 | E/10 | Manufacturer Part No 358310.
Toyo Open Country R/T Pro 38X13.5R20
The Toyo Open Country R/T Pro 38X13.5R20 is built for the rare breed of truck that refuses to compromise. Standing 38 inches tall with a 13.5-inch-wide tread on a 20" rim, this tire is the centerpiece of serious super-duty off-road builds. Ford F-250, RAM 2500, RAM 3500, and Silverado 2500HD owners running 6"+ lifts turn to this size when they need maximum trail capability without sacrificing the structural strength required for real towing and hauling work. The rugged-terrain tread pattern performs across every surface type — rocks, mud, sand, and everything in between — while Load Range E construction ensures the tire handles heavy loads without complaint. The 20" rim provides a slightly lower-profile sidewall compared to the 38X13.5R18, adding to road stability on highway stretches between off-road adventures. This is the tire for builds that demand the best.
Overview
The Open Country R/T Pro 38X13.5R20 is a rugged-terrain hybrid designed for drivers who need more than a standard all-terrain without committing to the full compromises of a mud-terrain. The 38" diameter, 13.5" wide, fits 20" rim. A massive flotation-style tire on 20" wheels — perfect for heavily modified super-duty trucks that want 38-inch height with the clearance and bead protection of a 20" rim setup. On paved roads, the Load Range E construction keeps this large tire stable at highway speeds, while the tread pattern manages noise effectively for its aggressive size. Off-road, 38X13.5R20 delivers serious performance — shoulder lugs bite into rock faces, staggered blocks shed mud, and the reinforced casing resists punctures on the harshest terrain. It is a strong match for extreme off-road builds on super-duty platforms, overlanding at 38-inch height, show trucks, prerunner desert builds, tow-capable trail monsters, and carries a 128Q load rating for dependable performance under demanding conditions.
Key Features & Specifications
- Massive 38-inch height on 20" rims for extreme clearance on modified super-duty trucks
- Wide 13.5-inch tread delivers outstanding off-road flotation in mud, sand, and rock
- Load Range E handles the demands of towing and payload on super-duty platforms
- R/T hybrid tread conquers mud, loose terrain, and technical rocky trails
- 20" fitment provides enhanced road stability vs 17"/18" equivalent
- Stone ejectors and wide tread voids prevent mud packing on the trail
- Reinforced sidewall and tread design built for heavy-duty long-term use
Load Range E construction, load rating 128Q, size 38X13.5R20. These elements work together to deliver confident traction on and off the road with long-lasting durability.
On‑Road and Off‑Road Performance
On paved roads, the Load Range E construction keeps this large tire stable at highway speeds, while the tread pattern manages noise effectively for its aggressive size. The tread void ratio is tuned to balance mud evacuation with a stable contact patch, so braking and steering remain predictable on wet or dry pavement. In winter conditions, the sipes and block edges help in unpacked snow, though this is not a dedicated winter tire — consider winter tires where conditions are severe. Off-road, 38X13.5R20 delivers serious performance — shoulder lugs bite into rock faces, staggered blocks shed mud, and the reinforced casing resists punctures on the harshest terrain. Stone ejecting grooves help keep the tread clear, reducing rock drilling and protecting the casing over rough fire roads and construction sites.
Off‑Road Capability
The shoulder lugs and alternating block edges on the 38X13.5R20 create side bite in ruts and technical sections. The cut and chip resistant compound limits damage on rocky terrain, and airing down within safe limits increases the footprint for sand and rock crawling — always reinflate before returning to highway speeds. Avoid excessive wheelspin on sharp surfaces, and rotate regularly to keep wear even across drive axles. This size is particularly well-suited for extreme off-road builds on super-duty platforms, overlanding at 38-inch height, show trucks, prerunner desert builds, tow-capable trail monsters.
Fitment & Compatibility
Trucks: Ford F-250 Super Duty, Ford F-350, RAM 2500, RAM 3500, GMC Sierra 2500HD, Chevrolet Silverado 2500HD
SUVs: Toyota Land Cruiser (custom lifted builds), Ford Expedition (custom extreme builds)
Off-Road & Specialty Vehicles: Rock crawlers on 20" beadlock wheels, extreme overland builds, prerunner trucks, custom super-duty off-road rigs
Always verify fitment using your vehicle's door-jamb label. Confirm clearance at full steering lock and suspension compression. Larger or wider sizes may require a leveling kit, lift, corrected wheel offset, or minor trimming depending on your specific vehicle configuration.
Sizes & Load Rating
This listing is for size 38X13.5R20 with a load rating of 128Q (Load Range E). This rating makes it suitable for heavy towing and payload demands on super-duty platforms, though always verify that load index meets or exceeds your vehicle's minimum requirements, especially if you tow or carry heavy payloads regularly.
Pricing & Value
Pricing for the 38X13.5R20 size reflects its Load Range E construction and rugged-terrain capability. Installed cost includes mounting, balancing, TPMS service, and alignment. Look at total ownership value — including durability on rough roads, balanced on-road manners, and dependable trail traction — when comparing against alternatives. Regular rotations, proper inflation, and periodic alignments extend tread life and maximize your investment.
Open Country R/T Pro 38X13.5R20 vs Alternatives
In the 38X13.5R20 size category, the Open Country R/T Pro competes with aggressive all-terrains like the BFGoodrich All-Terrain T/A KO2 and Falken Wildpeak AT3W, typically offering a more open lug pattern for added loose-surface bite. Compared with other rugged-terrain hybrids such as the Nitto Ridge Grappler or Goodyear Wrangler Duratrac, the R/T Pro emphasizes durability and off-road traction while keeping composed on-road manners. Related sizes worth comparing include 38X13.50R18, 40X15.50R22, 37X13.50R20 — extreme-size options for heavily modified super-duty builds. The best choice depends on your priorities — maximum trail capability or quieter daily comfort.
