Finding the best off-road tires for the BR-generation 2009–2015 Subaru Outback can be difficult, as there are countless options available. Rolling Big Power specializes in offering tire upgrades for the Outback platform. Whether you drive a base 2.5i, a well-appointed 2.5i Premium or Limited, or the performance-oriented 2.5XT, RBP has a tire that fits your BR-generation Outback. Additionally, RBP has a wide range of niche and unique tire sizing options that accommodate aftermarket wheel and suspension lift setups.
The BR-generation Outback utilizes four primary sizes; 16 inch, 17 inch, 18 inch, and 19 inch depending on trim level. Available factory sizes are 215/70R16 (27.85 x 8.46 x 16), 225/60R17 (27.63 x 8.86 x 17), 225/55R18 (27.74 x 8.86 x 18), and 245/45R19 (27.68 x 9.65 x 19). The table below shows factory tire sizes for the 2009–2015 Subaru Outback, along with flotation size conversions to help make shopping for off-road tires easy.
| Diameter | Standard Sizing | Flotation Sizing |
|---|---|---|
| 16 Inch | 215/70R16 | 27.85 x 8.46 x 16 |
| 17 Inch | 225/60R17 | 27.63 x 8.86 x 17 |
| 18 Inch | 225/55R18 | 27.74 x 8.86 x 18 |
| 19 Inch | 245/45R19 | 27.68 x 9.65 x 19 |
Finding the best off-road tires for the BS-generation 2014–2022 Subaru Outback can be difficult, as there are countless options available. Rolling Big Power specializes in offering tire upgrades for the Outback platform. Whether you drive a base 2.5i, a feature-loaded 2.5i Limited, or the top-tier 3.6R Touring, RBP has a tire that fits your BS-generation Outback. Additionally, RBP has a wide range of niche and unique tire sizing options that accommodate aftermarket wheel and suspension lift setups.
The BS-generation Outback utilizes three primary sizes; 17 inch, 18 inch, and 19 inch depending on trim level. Available factory sizes are 225/65R17 (28.52 x 8.86 x 17), 245/60R17 (28.57 x 9.65 x 17), 225/60R18 (28.63 x 8.86 x 18), 245/55R18 (28.61 x 9.65 x 18), and 245/50R19 (28.65 x 9.65 x 19). The table below shows factory tire sizes for the 2014–2022 Subaru Outback, along with flotation size conversions to help make shopping for off-road tires easy.
| Diameter | Standard Sizing | Flotation Sizing |
|---|---|---|
| 17 Inch | 225/65R17 | 28.52 x 8.86 x 17 |
| 17 Inch | 245/60R17 | 28.57 x 9.65 x 17 |
| 18 Inch | 225/60R18 | 28.63 x 8.86 x 18 |
| 18 Inch | 245/55R18 | 28.61 x 9.65 x 18 |
| 19 Inch | 245/50R19 | 28.65 x 9.65 x 19 |
Finding the best off-road tires for the BT-generation 2020–2025 Subaru Outback can be difficult, as there are countless options available. Rolling Big Power specializes in offering tire upgrades for the Outback platform. Whether you drive a base Outback, a mid-range Premium or Limited, the adventure-focused Wilderness, or the top-of-the-line Touring XT, RBP has a tire that fits your BT-generation Outback. Additionally, RBP has a wide range of niche and unique tire sizing options that accommodate aftermarket wheel and suspension lift setups.
The BT-generation Outback utilizes two primary sizes; 17 inch and 18 inch depending on trim level. Available factory sizes are 225/65R17 (28.52 x 8.86 x 17), 245/60R17 (28.57 x 9.65 x 17), 225/60R18 (28.63 x 8.86 x 18), and 245/55R18 (28.61 x 9.65 x 18). The table below shows factory tire sizes for the 2020–2025 Subaru Outback, along with flotation size conversions to help make shopping for off-road tires easy.
| Diameter | Standard Sizing | Flotation Sizing |
|---|---|---|
| 17 Inch | 225/65R17 | 28.52 x 8.86 x 17 |
| 17 Inch | 245/60R17 | 28.57 x 9.65 x 17 |
| 18 Inch | 225/60R18 | 28.63 x 8.86 x 18 |
| 18 Inch | 245/55R18 | 28.61 x 9.65 x 18 |
Finding the best off-road tires for the all-new BU-generation 2026–2027 Subaru Outback can be difficult, as there are countless options available. Rolling Big Power specializes in offering tire upgrades for the Outback platform. Whether you drive a base Outback, a well-equipped Premium or Limited, the rugged Wilderness edition, or the premium Touring trim, RBP has a tire that fits your BU-generation Outback. Additionally, RBP has a wide range of niche and unique tire sizing options that accommodate aftermarket wheel and suspension lift setups.
The BU-generation Outback utilizes three primary sizes; 17 inch, 18 inch, and 19 inch depending on trim level. Available factory sizes are 225/65R17 (28.52 x 8.86 x 17), 245/60R17 (28.57 x 9.65 x 17), 225/60R18 (28.63 x 8.86 x 18), 245/55R18 (28.61 x 9.65 x 18), and 225/55R19 (28.74 x 8.86 x 19). The table below shows factory tire sizes for the 2026–2027 Subaru Outback, along with flotation size conversions to help make shopping for off-road tires easy.
| Diameter | Standard Sizing | Flotation Sizing |
|---|---|---|
| 17 Inch | 225/65R17 | 28.52 x 8.86 x 17 |
| 17 Inch | 245/60R17 | 28.57 x 9.65 x 17 |
| 18 Inch | 225/60R18 | 28.63 x 8.86 x 18 |
| 18 Inch | 245/55R18 | 28.61 x 9.65 x 18 |
| 19 Inch | 225/55R19 | 28.74 x 8.86 x 19 |
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 Subaru Outback, you may come across flotation sizing designations. These will typically read as 35×12.50×17.
Yes — in many cases, Outback owners can fit slightly larger tires within the factory wheel wells without any suspension modification. The key is staying within roughly 5–10% of your OEM diameter to avoid rubbing and prevent interference with the AWD system's calibration. At RBP, we offer sizing options that maximize tread and sidewall presence while keeping fitment safe and clean for stock-height Outbacks.
As long as all four tires are the same size and inflated to equal pressure, your Subaru's Symmetrical All-Wheel Drive system will operate normally. Problems arise when mismatched sizes cause variance in rotational speed between axles, which can strain the center differential over time. We always recommend replacing all four tires at once and confirming the new diameter closely matches your factory spec — something our team can help you verify before purchase.
The Outback Wilderness is built from the factory with off-road intent, so it responds exceptionally well to a proper tire upgrade. We recommend the RBP Repulsor M/T RX or Repulsor A/T for Wilderness owners who want to maximize traction on loose terrain, gravel, and light trail use without giving up daily highway manners. Both lines are available in sizes that pair perfectly with the BT and BU Wilderness factory wheel specs.
The BS-generation (2014–2022) and BU-generation (2026–2027) Outbacks offer the most factory sizing diversity, with options spanning 17 to 19 inches across trim levels. This range gives aftermarket enthusiasts more flexibility when selecting RBP tire sizes that complement lift spacers or upgraded wheels. The BR-generation (2009–2015) is equally versatile thanks to its 16-inch base sizing, which opens the door to taller sidewall options with excellent off-road compliance.
Upgrading to aftermarket tires does not automatically void your Subaru warranty. Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your warranty simply because you installed aftermarket parts — they must prove the part directly caused the issue in question. That said, we always recommend consulting your dealership before making significant size changes, and RBP is happy to help you select a tire that keeps you covered both on the trail and at the service center.
