Can I Replace 2 Tires Instead of 4 on an AWD?

Yes—sometimes. On an all-wheel-drive (AWD) vehicle, you can replace only two tires if the remaining two are nearly new and the rolling circumference (effective diameter) closely matches within strict tolerances. If the difference is too large, you risk damaging the AWD system, causing drivability issues, and potentially voiding warranties. Below is what automakers, tire experts, and technicians recommend, plus how to measure whether two tires are truly safe on your AWD.

Why AWD Vehicles Are Sensitive to Tire Mismatches

AWD systems continuously coordinate front and rear axle speeds through a center differential or electronically controlled clutch packs. If one axle’s tires are larger (new) and the other axle’s are smaller (worn), they spin at different speeds even in a straight line. That constant speed mismatch forces the center coupling to slip more, generating heat and wear that can prematurely damage transfer cases, differentials, or couplers. Modern stability control and ABS may also interpret the mismatch as wheel-speed faults, triggering warning lights or erratic behavior.

What Automakers and Tire Experts Recommend in 2025

Guidance varies by brand, but the trend is consistent: keep all four tires as closely matched as possible in size, type, and wear. Here are common recommendations you’ll encounter from OEMs and tire experts today.

• Same size, model, and load/speed rating: Most AWD manufacturers require identical tire specifications on all four corners.
• Tread-depth tolerance: Many dealers and tire specialists target a maximum difference of about 2/32 inch (1.6 mm) to 3/32 inch (2.4 mm) between the deepest and shallowest tires on AWD before recommending four replacements or shaving new tires.
• Rolling-circumference tolerance: Some brands and shops use a circumference difference threshold around 0.5% (often translating to roughly 1/4 inch or 6 mm in circumference) as a practical limit.
• Subaru, Audi, BMW, Volvo, and similar AWD systems: Typically insist on same-size, closely matched tread wear; service departments often advise replacing four if the difference exceeds ~2/32–3/32 inch or shaving new tires to match.
• Tire industry guidance (e.g., major retailers and manufacturers): Prefer all four on AWD, but allow two if the new pair is shaved or the existing pair is nearly new and within the tight tolerances above.

While the specific numbers can vary, the spirit of the guidance is uniform: AWD systems tolerate only small differences. Always check your owner’s manual and follow the strictest spec you find from your OEM or trusted tire expert.

When Replacing Only Two Tires May Be Acceptable

You can often safely replace two tires on AWD when the remaining pair is almost new and overall diameter differences are minimal. Meeting the conditions below reduces the risk of drivetrain stress.

• The remaining tires are very lightly worn: Ideally within 2/32–3/32 inch of the new pair’s tread depth.
• All four are the exact same tire: Same brand, model, size, and specification to ensure similar construction and rolling radius.
• Tire shaving is used if necessary: A shop can shave the two new tires so their tread depth matches the existing pair within spec.
• Installation on the rear axle: Even on AWD, most safety bodies and tire makers recommend placing the better (newer) tires on the rear to reduce the risk of oversteer during emergency maneuvers or on wet roads.
• Alignment and inflation are spot-on: A fresh alignment, correct pressures, and proper rotation schedule help minimize uneven wear that widens the mismatch over time.

If you can’t meet those conditions, replacing only two becomes a gamble: the AWD system may slip excessively, run hotter, and suffer premature wear or fault codes.

When You Should Replace All Four

There are scenarios where replacing all four tires on an AWD is strongly advised—and often cheaper than repairs caused by mismatched sizes.

• Large tread-depth gap: If your best two tires are more than ~3/32 inch shallower than new, the mismatch is usually beyond safe limits.
• Mixed models or constructions: Different brands or models—even at the same stated size—can have different actual diameters and flex characteristics.
• Uneven wear patterns: Cupping or shoulder wear can effectively change circumference and handling balance.
• Manufacturer mandates: Some AWD systems, particularly performance or off-road biased ones, are less tolerant and effectively require replacing four.
• Staggered setups or limited availability: If your vehicle runs different sizes front/rear or your tire model is discontinued, four may be the only path to proper matching.

In these cases, replacing all four helps protect expensive AWD hardware and preserve predictable handling and braking performance.

How to Measure Whether You Can Do Two Tires Safely

Before deciding, quantify the difference. A quick, methodical check can tell you if two tires will work—or if four is the prudent choice.

1. Measure tread depth: Using a tread gauge, measure all main grooves across each tire and record the average. Compare the shallowest existing tire to the brand-new spec for the replacement model.
2. Check rolling circumference: Use a flexible tape around the tread or perform a chalk-roll test on level ground to estimate circumference. Compare front versus rear.
3. Assess the delta: If tread depth difference exceeds ~2/32–3/32 inch or circumference varies by more than ~0.5% (often about 1/4 inch), plan on four or shave the new pair.
4. Confirm with the manual/shop: Cross-check your readings with your owner’s manual and consult a reputable tire shop for tire shaving or a professional verdict.

This quick assessment helps you avoid guesswork and make a decision backed by measurements and manufacturer guidance.

Cost-Saving Options If Four Tires Are Required

If you’re advised to replace all four, there are ways to manage cost without compromising your AWD system.

• Tire shaving: Buy two new tires and have them shaved to match the remaining pair (if they’re still healthy), preserving the investment in good tires.
• Quality used matches: Source two lightly used tires of the exact same model and similar tread depth from a reputable dealer—then verify age and condition.
• Pro-rated warranties and rebates: Check if existing tires qualify for pro-rate credit and watch for seasonal manufacturer rebates or retailer bundles.
• Rotate on schedule: After purchase, rotate at 5,000–7,500 miles to keep wear even and extend the life of the full set.

These strategies can reduce upfront cost while maintaining the tight matching AWD requires.

Common Myths and Facts

Misconceptions about AWD tire replacement can lead to expensive mistakes. Here are frequent claims and how they stack up.

• Myth: “AWD can handle it; it’s always sending power everywhere.” Fact: Most modern AWD uses clutches that slip; mismatched tires force constant slip and heat.
• Myth: “Same size number on the sidewall means same diameter.” Fact: Construction differences between brands/models change true rolling radius.
• Myth: “Put the best tires up front for steering.” Fact: Industry safety guidance places the better tires on the rear to help prevent spin-outs, even on AWD.
• Myth: “Electronics will ‘learn’ the difference.” Fact: Systems adapt within limits; beyond that, you get wear, heat, and potential fault codes.

Understanding these realities helps you make a choice that protects both safety and hardware.

Summary

You can sometimes replace only two tires on an AWD—if the other two are nearly new and the rolling circumference difference is kept very small (often within ~2/32–3/32 inch tread depth or about 0.5% circumference). Use identical tire models, consider shaving, and mount the better pair on the rear. If the mismatch is larger, replace all four to avoid overheating clutches, damaging differentials, and compromising safety. When in doubt, measure, consult your manual, and get a professional opinion from a reputable tire shop.

Can you replace two tires instead of all four?

Unless there are manufacturer reasons, there’s no need to replace all 4 tires. You can even have different set of front and back tires. However, having different tires on both side can be considered a safety hazard.

Can you replace only two tires on an AWD?

While you can replace only two tires on an AWD vehicle, it’s generally not recommended due to the risk of damaging the drivetrain components. The primary concern is the difference in tread depth, which causes the tires to rotate at different speeds, putting uneven stress on the system. However, it may be acceptable if the tread depth difference between the new and existing tires is minimal (less than 2/32 of an inch), or if you have the new tires shaved down to match the existing ones. 
Why replacing only two tires is risky for AWD vehicles:

• Tread depth differences: When a tire is replaced, its tread is deeper than a worn tire. 
• Uneven rotation: The new tire’s larger diameter forces the older, worn tires to spin faster to keep up. 
• Drivetrain stress: This difference in rotational speed creates uneven stress on the AWD system’s various components, such as the center differential, which can lead to expensive damage. 
• Manufacturer recommendations: Most manufacturers advise replacing all four tires simultaneously to ensure consistent tread depth, traction, and performance. 

When it might be acceptable:

• Minimal tread difference: Opens in new tabIf the tread depth difference is less than 2/32 of an inch, replacing only two tires might be safe, according to some sources. 
• Tire shaving: Opens in new tabYou can have a new tire “shaved” to match the tread depth of the existing tires, ensuring they have the same circumference and rotation speed. This service costs money and reduces the lifespan of the new tire but can be an option to avoid replacing all four, notes Car From Japan. 

In summary:
The safest and most recommended approach for AWD vehicles is to replace all four tires at once. If budget is a concern, consider tire shaving or look for a tire professional to assess the wear difference on your current tires.

Can you replace two tires on a four wheel drive car?

If you are looking to replace all-wheel drive tires, we recommend replacing all four at once. While it may be tempting to replace only two at a time, mixing new and worn tires can create a size difference from front to back, which can lead to damage to your vehicle.

Can you replace just two tires on a 4WD?

No, you generally should not replace just two tires on a four-wheel drive (4WD) or all-wheel drive (AWD) vehicle because mismatched tire sizes and tread depths can cause premature wear and damage to the drivetrain components, such as the transmission, transfer case, and differentials. For an AWD system to function correctly, the tires must be the same brand, size, and have nearly identical tread depth. 
Risks of replacing only two tires:

• Drivetrain Damage: A significant difference in tire circumference between the front and rear axles forces the center differential to constantly compensate, leading to excessive heat and wear. 
• Confusing Traction Control: Mismatched tire speeds can confuse the vehicle’s traction control system. 
• Uneven Wear: The drivetrain components are under continuous strain, which can lead to costly repairs. 

Recommendations:

• Replace all four tires: This is the safest and most recommended approach to maintain drivetrain health and performance. 
• Consult your owner’s manual: Check your vehicle’s owner’s manual for specific recommendations on tire replacement and tread depth tolerances. 
• Consider professional advice: A reputable tire dealer can provide guidance based on the manufacturer’s recommendations for your specific vehicle. 
• Explore tread shaving: Some tire services offer tread shaving to match a new tire’s tread depth to existing tires on the same axle, which can help minimize variations. 

This video explains why replacing all four tires on an AWD vehicle is recommended: 45sPaul KelleyYouTube · Nov 5, 2021