How to Install Wheel Spacers on Subaru WRX: A Step-by-Step DIY Guide

If you own a Subaru WRX, you know the factory wheel fitment leaves a lot to be desired. The wheels sit tucked too far inside the wheel wells, creating a narrow, less aggressive stance that doesn't match the car's performance potential. Installing wheel spacers is one of the simplest and most cost-effective modifications to push your wheels outward, giving your WRX a wider, more planted look while also improving handling characteristics.

In this guide, we'll walk you through the entire process of installing wheel spacers on a Subaru WRX, covering everything from choosing the right spacer thickness to torquing the lug nuts correctly. Whether you're a first-time DIYer or an experienced enthusiast, this step-by-step tutorial will help you achieve a perfect flush fitment safely and confidently.

Why Install Wheel Spacers on Your Subaru WRX?

Wheel spacers are simple aluminum or steel rings that mount between your vehicle's hub and the wheel. Their primary purpose is to increase the track width—the distance between the left and right wheels—which pushes the wheels outward toward the fenders. For the Subaru WRX, this addresses the common complaint of wheels sitting too far inward, leaving an unsightly gap between the tire sidewall and the fender edge.

Beyond aesthetics, wheel spacers can also improve handling. A wider track width lowers the vehicle's center of gravity relative to the wheelbase, reducing body roll during cornering and increasing stability at high speeds. Many WRX owners report a more confident, planted feel after installing spacers, especially when paired with upgraded suspension components like the 2022-2026 Subaru WRX AFD RS Adjustable Coilover Kit. However, it's important to note that spacers should be hub-centric to ensure proper centering and reduce vibrations.

• Flush fitment: Eliminates the factory 'tucked' look for a more aggressive stance.
• Improved handling: Wider track reduces body roll and increases cornering stability.
• Cost-effective: Much cheaper than buying new wheels with different offset.
• Easy DIY: Can be installed at home with basic tools in under an hour.

Choosing the Right Wheel Spacer for Your WRX

Selecting the correct wheel spacer involves understanding a few key specifications: thickness, bolt pattern, hub bore, and whether it's hub-centric or lug-centric. For the Subaru WRX (2015-2026 models), the factory bolt pattern is 5x114.3mm, and the hub bore is 56.1mm. Spacers that match these dimensions will bolt directly onto your hubs without the need for adapters.

Thickness is measured in millimeters—common choices for the WRX range from 15mm to 25mm. A 15mm spacer provides a subtle push outward, while 20mm or 25mm spacers create a more pronounced flush fitment. Always verify that your chosen spacer thickness will not cause tire rubbing against the fender during suspension compression. If you're also planning to add aero components like the 2022-2026 Subaru WRX Front Bumper Trim V1, a slightly wider stance can complement the new front-end look.

• Hub-centric spacers: Centered by the hub bore, reducing vibrations and ensuring smooth rotation.
• Lug-centric spacers: Centered by the lug nuts; acceptable but less precise than hub-centric.
• Material: 6061-T6 aluminum is lightweight and strong; avoid steel spacers for daily driving.
• Extended studs: For spacers thicker than 15mm, you may need longer wheel studs to maintain safe thread engagement.

Tools and Materials Needed

Before you begin, gather all necessary tools and materials. Having everything ready will make the installation smoother and prevent unnecessary trips to the toolbox. You'll need a jack and jack stands (or a lift), a lug wrench or torque wrench, a breaker bar for stubborn bolts, and possibly a wire brush to clean the hub surface. Additionally, you'll need the wheel spacers themselves, along with any extended lug nuts if your spacers require them.

For the Subaru WRX, we recommend using high-quality hub-centric spacers from a reputable brand. If you're pairing the spacers with other suspension upgrades, consider how the stance will affect the overall look. For instance, a flush fitment combined with the 2015-2026 Subaru WRX Swan Neck Wing creates a cohesive motorsport-inspired appearance that turns heads.

• Jack and two jack stands (or a hydraulic lift)
• Torque wrench (capable of 80-100 ft-lbs)
• Breaker bar and socket set (19mm or 21mm for lug nuts)
• Wire brush or rag for cleaning hub surface
• Wheel spacers (e.g., 15mm, 20mm, or 25mm hub-centric)
• Extended lug nuts (if required for your spacer thickness)
• Anti-seize compound (optional, but recommended for aluminum spacers)

Step-by-Step Installation Guide

Start by parking your Subaru WRX on a level surface and engaging the parking brake. Loosen the lug nuts on all four wheels slightly (do not remove them yet) while the car is still on the ground. This prevents the wheels from spinning as you break the torque. Then, jack up one corner of the car and place a jack stand securely under the designated lift point. Repeat for the other corners if you plan to install all four spacers at once.

Once the car is safely supported, remove the lug nuts and take off the wheel. Use a wire brush to clean any rust or debris from the hub surface and the back of the wheel. Slide the wheel spacer onto the hub, ensuring it sits flush against the hub face. If the spacer has its own studs, you'll need to install extended lug nuts to secure the spacer to the hub. If it's a slip-on style, the spacer will rest on the hub, and you'll mount the wheel over it using the factory studs (or extended studs if needed).

• Always torque lug nuts in a star pattern to ensure even pressure.
• For spacers with separate studs, tighten the spacer-to-hub nuts to 65-75 ft-lbs first.
• Mount the wheel onto the spacer, hand-tighten the lug nuts, then lower the car to the ground.
• Final torque the wheel lug nuts to 80-85 ft-lbs (check your vehicle's manual for exact spec).

Torque Specs and Safety Checks

Proper torque is critical when installing wheel spacers. Under-torqued lug nuts can loosen over time, while over-torquing can warp the rotor or damage the studs. For most Subaru WRX models, the factory wheel lug nut torque specification is 80-85 ft-lbs. If you're using extended studs or aftermarket lug nuts, confirm the torque recommendation with the spacer manufacturer. Always use a calibrated torque wrench for the final tightening step.

After installation, drive the car for 10-20 miles, then re-check the torque on all lug nuts. It's normal for new spacers and wheels to settle slightly, and a retorque ensures everything remains secure. Also, inspect the clearance between the tire and fender by turning the steering wheel lock-to-lock and compressing the suspension by hand. If you hear rubbing, you may need a thinner spacer or rolled fenders. For a clean, aggressive look, many WRX owners pair spacers with aero upgrades like the 2022-2026 Subaru WRX Front Bumper Trim V1 to complete the transformation.

• Torque lug nuts to 80-85 ft-lbs in a star pattern.
• Retorque after 50-100 miles of driving.
• Check for vibrations at highway speeds—vibrations usually indicate a non-hub-centric spacer or improper installation.
• Inspect spacer-to-hub contact annually for corrosion or loosening.

Common Mistakes to Avoid

One of the most common mistakes is using non-hub-centric spacers. Without a snug fit on the hub bore, the wheel can be slightly off-center, causing vibrations that are difficult to diagnose. Always choose hub-centric spacers that match your WRX's 56.1mm hub bore. Another frequent error is failing to account for the increased stress on wheel bearings. While spacers are generally safe for daily driving, extremely thick spacers (30mm or more) can accelerate bearing wear, so stick to 15-25mm for a balance of stance and longevity.

Additionally, some enthusiasts install spacers without upgrading their wheel studs. If your spacer is thicker than 15mm, the factory studs may not provide enough thread engagement for the lug nuts. In that case, you'll need extended studs or a spacer that comes with its own studs. Finally, don't skip the retorque step—it's the most overlooked safety measure. A loose wheel at highway speed is dangerous, so take the extra 15 minutes to double-check everything.

• Avoid lug-centric spacers on the WRX—they rarely center perfectly.
• Do not exceed 25mm thickness without verifying fender clearance.
• Always use a torque wrench; never guess by feel.
• If you hear clicking or clunking after installation, inspect the spacer-to-hub fit immediately.

Installing wheel spacers on your Subaru WRX is a rewarding DIY project that transforms the car's stance and handling without breaking the bank. By following this guide, you'll achieve a flush, aggressive look that complements other performance and aesthetic upgrades. For a complete transformation, consider pairing your new spacers with the 2022-2026 Subaru WRX AFD RS Adjustable Coilover Kit to dial in your ride height and further enhance cornering ability. Shop our full selection of Subaru WRX parts and accessories to build the WRX of your dreams.