Guide to AWD and 4WD Tire Replacement and Selection
Looking to replace tires on your AWD or 4WD vehicle and keep your drivetrain safe? Here’s a concise guide to when you must replace all four, what to do if you can’t, and how to choose the right tire type for your vehicle and driving conditions.
The short answer: replace all four on AWD/4WD whenever possible
To protect the transfer case, center differential, and other AWD/4WD components, keep all four tires closely matched in overall diameter.
Best practice: replace all four tires at the same time with the same brand, model, size, speed rating, and load index.
If your owner’s manual allows fewer than four, most manufacturers still require very tight matching. A common guideline is keeping all four within about 2/32 inch of tread depth of each other and identical construction. Always follow your owner’s manual.
Why matching matters on AWD/4WD
AWD/4WD systems rely on all four tires rolling at nearly the same speed. Significant differences in circumference (caused by uneven wear or mixing tire models/sizes) can force internal components to slip or bind, leading to premature wear or damage.
Mixing different tread patterns, casings, speed/load ratings, or even similar tires from different production batches can reduce traction consistency and stability, especially in rain, snow, or loose surfaces.
If you cannot replace all four
Replace two only if your manual explicitly allows it and your remaining two have similar tread depth.
Match the exact tire: same brand, model, size, load, and speed rating.
Keep tread depths closely matched. If the depth difference is too large, ask about tire “shaving” to bring new tires down to a similar depth as the partially worn ones.
For stability, install the newer/deeper pair on the rear axle—even on FWD and AWD vehicles—to reduce the risk of oversteer in wet conditions.
Part-time 4WD: avoid driving in 4WD on pavement with mismatched tires. Use 2WD on-road until the set is properly matched.
How to check if your set is “close enough”
Measure tread depth on all four tires with a gauge at several points across each tread. Note the deepest and shallowest measurements.
If the spread exceeds what your owner’s manual allows (often around 2/32 inch across the set), replace or shave to match.
Check inflation before measuring. Under/over-inflation can alter effective rolling radius.
Maintenance that keeps AWD/4WD happy
Rotate every 5,000–6,000 miles (or per your manual) to even out wear.
Keep tires inflated to placard pressures and align annually or when you notice uneven wear.
Replace before they’re worn out in pairs that would violate your system’s matching requirements.
Best tire types by drivetrain and conditions
AWD vehicles
Mild climates, year-round: Grand touring all-season for balanced comfort, wet traction, and tread life.
Four-season versatility with real winter capability: All-weather tires (3PMSF-rated) for reliable snow/ice grip without swapping to dedicated winters.
Severe winter: Dedicated winter/snow tires on all four wheels for maximum cold-weather traction and braking.
Light trails and mixed surfaces: All-terrain or on-/off-road tires with highway-friendly manners; consider 3PMSF-rated A/T options for snow-prone regions.
Performance-focused AWD sedans/coupes in warm climates: Ultra-high-performance summer tires for dry/wet grip and steering precision.
Typical U.S. roads: Choose strong wet braking and hydroplaning resistance for rain-prone areas; look for 3PMSF if you regularly see snow/ice.
RWD vehicles
Handling and highway confidence: Performance all-season for balanced dry/wet grip and stability at speed.
Warm climates and spirited driving: Ultra-high-performance summer for maximum dry grip and steering feel.
Cooler or variable climates: Grand touring all-season for comfort, longevity, and wet traction.
Snow-belt regions: Dedicated winter tires on all four for starting, steering, and stopping security.
For RWD, prioritize rear-axle traction and wet braking; consider wider rear fitments carefully to maintain hydroplaning resistance.
FWD vehicles
Daily commuting and fuel economy: Touring or grand touring all-season with low rolling resistance for comfort and mpg.
Wet-road traction: Look for advanced silica compounds and high “wet braking/traction” test results.
Year-round in variable climates: All-weather (3PMSF) for a single set that handles light-to-moderate winter conditions.
Heavy winter: Dedicated winter tires improve starting traction and—critically—stopping distances.
FWD tends to wear fronts faster—rotate regularly to maintain even tread depth and balanced handling.
Tip: When replacing fewer than four on AWD/4WD, confirm your owner’s manual requirements, match the exact tire model/specs, keep tread depths tightly aligned, and install the newer pair on the rear axle.