You're viewing new Toyo Open Country R/T Pro Tire | LT275/70R18 | E/10 | Manufacturer Part No 358210.
Toyo Open Country R/T Pro LT275/70R18
The Toyo Open Country R/T Pro LT275/70R18 is the upgrade path for super-duty truck and full-size SUV owners who want aggressive off-road tread performance in a factory-friendly dimension. At approximately 33.2 inches in diameter, this tire maintains stock speedometer accuracy and tow rating compatibility on Ford F-250, RAM 2500, Silverado 2500HD, and Toyota Land Cruiser platforms. The narrow 10.8-inch tread width combined with a tall 70-series aspect ratio gives this tire a natural trail-compliance bias, making it especially capable on loose and rocky terrain. Dual load ratings (125/122Q) support both single and dual-wheel configurations common on super-duty trucks. This is the rugged-terrain upgrade that keeps your truck ready for work, towing, and trail — without requiring any modifications.
Overview
The Open Country R/T Pro LT275/70R18 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 LT275/70R18: 275mm (~10.8") wide, 70% aspect ratio, 18" rim. Approximately 33.2" overall diameter. A tall and narrow 18-inch option — factory fitted on some super-duty trucks and popular as a trail-capable upgrade with stock dimensions. On pavement, the LT275/70R18 delivers predictable highway handling, confident wet braking, and manageable noise levels for a tire of this tread aggression. Off-road, the open shoulders, staggered lugs, and stone ejectors combine to provide solid traction in dirt, gravel, light mud, and loose terrain typical of trail and overland driving. It is a strong match for factory-dimension upgrade on super-duty trucks, overlanding with factory wheel fitment, towing-first drivers wanting off-road capability, fleet and work trucks, and carries a 125/122Q load rating for dependable performance under demanding conditions.
Key Features & Specifications
- Factory-equivalent diameter for maintained tow ratings and speedometer accuracy
- Narrow-and-tall profile delivers superior trail compliance on rough terrain
- Dual-rated (125/122Q) for single and dual-wheel super-duty fitment
- Load Range E supports heavy payloads and towing demands
- Rugged-terrain tread delivers confident grip in dirt, gravel, and rain
- Tall 70-series sidewall absorbs trail impacts and improves aired-down performance
- Stone ejectors extend tread life during off-road use
Load Range E construction, load rating 125/122Q, size LT275/70R18. These elements work together to deliver confident traction on and off the road with long-lasting durability.
On‑Road and Off‑Road Performance
On pavement, the LT275/70R18 delivers predictable highway handling, confident wet braking, and manageable noise levels for a tire of this tread aggression. 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, the open shoulders, staggered lugs, and stone ejectors combine to provide solid traction in dirt, gravel, light mud, and loose terrain typical of trail and overland driving. 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 LT275/70R18 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 factory-dimension upgrade on super-duty trucks, overlanding with factory wheel fitment, towing-first drivers wanting off-road capability, fleet and work trucks.
Fitment & Compatibility
Trucks: Ford F-250 Super Duty, RAM 2500 (factory on some configs), GMC Sierra 2500HD, Chevrolet Silverado 2500HD
SUVs: Toyota Land Cruiser (2021-2022), Toyota Sequoia TRD, Land Rover Defender 130
Off-Road & Specialty Vehicles: RAM 2500 Power Wagon (alternate), Ford F-250 FX4, overlanding super-duty builds
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 LT275/70R18 with a load rating of 125/122Q (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 LT275/70R18 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 LT275/70R18 vs Alternatives
In the LT275/70R18 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 LT275/65R18, LT285/75R18, LT285/65R18 — 18-inch super-duty options varying in height and width. The best choice depends on your priorities — maximum trail capability or quieter daily comfort.
