Finding the best replacement tires or tire upgrade for your INEOS Grenadier can be difficult. Rolling Big Power specializes in offering direct replacements, or upgrades for the Grenadier platform. Additionally, RBP has a wide range of niche and unique tire sizing options that can accommodate aftermarket wheel and suspension setups.
The first generation INEOS Grenadier from 2022-2026 utilizes 17 inch and 18 inch tires, depending on the truck’s trim and options. The table below shows factory tire sizes for the 2022-2026 INEOS Grenadier, along with flotation size conversions to help make off-road tire shopping easy.
| Diameter | Standard Sizing | Flotation Sizing |
|---|---|---|
| 17 Inch | LT265/70R17 | 31.61 x 10.43 x 17 |
| 17 Inch | 65/70R17 | 31.61 x 10.43 x 17 |
| 18 Inch | 255/70R18 | 32.06 x 10.04 x 18 |
| 18 Inch | LT255/70R18 | 32.06 x 10.04 x 18 |
The two things that affect tires are time and mileage. Naturally, the compounds on tires have a limited lifespan as they begin to breakdown over time. The mileage on a tire is only a general indication of it’s wear and usage. Neither time nor mileage are accurate indicators of a tire’s usability. The reason for that is because factors such as tire storage and care can improve or diminish lifespan. Typically most tires are manufactured to last at least five years under normal circumstances. If your tires are older than 5 years, it may be a good idea to consider replacements.
Reading the sidewall and understand tire sizing options can seem difficult at first. Once you learn the basics of what these numbers and markings mean, it becomes much simpler. Oftentimes original equipment tires use standard sizing designations, such as 255/70R17. However, when upgrading tires, especially for the Nissan Frontier, you may come across flotation sizing designations. These will typically read as 35×12.50×17.
The INEOS Grenadier comes standard with 265/70R17 or 255/70R18 tires. RBP offers upgraded tire options up to 285/70R17 (33 inches) that fit on stock suspension without modifications. For lifted Grenadiers with Eibach or similar suspension upgrades, RBP's 35-inch tire lineup delivers maximum off-road capability and aggressive styling. Whether you run 17" or 18" wheels, RBP has tire solutions engineered for the Grenadier's demanding performance requirements.
RBP offers both options to match your driving style. All-terrain tires excel at versatility, handling highways, gravel, and moderate trails with confidence. For extreme conditions like deep mud, sand, and rocks, RBP's mud-terrain lineup provides superior traction with aggressive tread patterns. Consider your primary terrain—RBP all-terrains maximize versatility while mud-terrains dominate the toughest conditions.
RBP recommends 36 PSI for highway driving. When off-roading, air down to 20-25 PSI for light trails, 15-20 PSI for sand and mud, and 25-30 PSI for rocky terrain. The Grenadier's door jamb shows higher pressures (43 PSI front/49 PSI rear) for maximum load capacity. Always carry a portable air compressor to reinflate RBP tires before returning to paved roads. However, this highly depends on the specific tire choice.
Yes—RBP offers 35-inch tire options that work with proper suspension modifications. A 30mm lift allows RBP's 35x12.50R17 tires to fit without rubbing, dramatically increasing ground clearance and off-road capability. For stock suspension, RBP recommends 285/75R17 tires (approximately 33 inches) for guaranteed fitment. RBP's 35-inch lineup handles the Grenadier's weight and power while delivering legendary toughness.
RBP recommends rotating your Grenadier's tires every 5,000 miles for even wear and maximum tire life. Regular rotations maintain consistent traction across all four corners, critical for the Grenadier's permanent four-wheel-drive system. Include your full-size spare in the rotation schedule to extend the life of your entire RBP tire set. Proper maintenance ensures RBP tires deliver maximum performance mile after mile.
