Can I replace just two tires on a Subaru?
Yes, you can replace two tires on many Subaru all-wheel-drive models, but there are important guidelines to follow to protect safety and the drivetrain. The general advice is to install the new tires on the rear axle and keep tire sizes and tread wear as similar as possible across all four wheels.
Understanding Subaru’s all‑wheel-drive system and tire replacement
Subaru’s Symmetrical AWD distributes power to all four wheels using a center differential. When tires have markedly different diameters or tread depths, the drivetrain can experience uneven loading, which may affect handling and longevity. For this reason, the vehicle’s owner manual and tire professionals often recommend strategic tire replacement rather than replacing just one tire or mixing widely different tires on an AWD Subaru.
- Replace two tires on the rear axle if you must replace only two. This helps preserve stability and reduces the risk of oversteer in slippery conditions.
- Ensure the two new tires are the same size, model, and speed rating as the remaining two tires, and that their tread depth is close to the others.
- Avoid mixing tires of significantly different sizes, wear, or brands on an AWD Subaru, as this can create drivetrain stress and unpredictable handling.
- Consider replacing all four tires if you find substantial tread depth differences or if the tires are aging out, to maintain balanced traction and predictable dynamics.
- Follow a regular tire rotation schedule after replacing two tires to equalize wear over time.
Implementing these guidelines helps maintain Subaru’s intended handling characteristics and protects the drivetrain from mismatched wheel speeds caused by uneven tire wear.
When replacing two tires makes sense—and when it doesn’t
Replacing two tires can be pragmatic for cost or availability, but it’s not always ideal. If you drive in regions with inclement weather, or you frequently encounter slick or uneven roads, there’s extra value in having uniform tread across all four wheels.
- Two-tire replacement is commonly accepted on AWD Subarus when the new tires are mounted on the rear axle and matched to the remaining tires in size and wear.
- Banking on all four tires being the same model and size helps preserve symmetric handling and reduces the chance of drivetrain-related wear over time.
- If the older tires are significantly more worn or different in size, replacing all four tires is the safer choice for most drivers.
- Leaning on a dealer or independent shop for a professional assessment is advisable, because they can measure circumference differences and advise you based on your exact model and tire choices.
Ultimately, the decision depends on tire availability, budget, and your local driving conditions. A professional assessment can help tailor the best approach for your Subaru.
Practical steps to take if you replace two tires
Following a few practical steps can help ensure a safe and compliant installation. This section outlines the best way to proceed when two-tire replacement is the chosen route.
- Choose tires that match the size, speed rating, load index, and overall diameter of the existing tires as closely as possible.
- Install the two new tires on the rear axle, then rotate the tires to promote even wear over time.
- Have the vehicle’s alignment checked if you notice unusual handling or vibration after installation.
- Monitor tire pressure and tread depth regularly, and replace all four when differences exceed manufacturer-recommended thresholds.
Following these steps helps minimize risk and supports consistent performance from your AWD Subaru over the life of the tires.
Model-specific guidance and safety reminders
While the guidance above reflects common practice for Subaru AWD vehicles, specific models and years may have nuances. Always consult your owner’s manual for model-specific recommendations, and consider asking a Subaru-certified technician or a reputable tire shop for a personalized assessment. If your vehicle is under warranty or a lease agreement, verify any requirements related to tire replacement and maintenance.
Summary
In short, you can replace two tires on many Subaru AWD models, but you should install the new tires on the rear axle and match them closely to the remaining tires in size, model, and tread depth. Avoid mixing widely different tires on an AWD system, and consider replacing all four if wear or age makes matching difficult. Regular rotations and periodic checks of tread depth and alignment help maintain optimum handling and protect the drivetrain.
Bottom line for Subaru owners
For most Subaru drivers, replacing two tires is acceptable when done thoughtfully: mount the new tires on the rear, keep sizes and tread patterns consistent across all four wheels, and seek professional advice if there is any doubt. This approach balances cost with safety and performance, while aligning with the manufacturer’s emphasis on symmetrical AWD dynamics.
Notes for readers
If you’re unsure about your specific model, contact a Subaru dealer or a qualified tire technician. They can verify tire size compatibility, calculate circumference, and advise on the best approach given your vehicle’s age, mileage, and typical driving conditions.
