Well-designed STI wheel spacers with a proper installation make driving better. By increasing the track width, wheel spacers help reduce body roll, which in turn leads to better handling and more comfortable driving. Boosting the aesthetic appeal with good wheel spacers helps in standing apart from the crowd.
By creating more inner wheel clearance, STI wheel spacers aid to install big brake calipers correctly. This enhances the handling even more. As long as you stick to quality ones and install them correctly, wheel spacers are exactly safe at high speeds. In this guide, we’ll delve into the ideal thickness for your car and the best spacer brand.
Best STI Wheel Spacers Size Chart
Thickness:
Choosing the best STI wheel spacers size depends on your personal preferences and car’s modification. Here is the reference sizes:
- 3mm to 5mm: Provides just enough space to clear big brake calipers while keeping an OEM-like wheel style and handling.
- 15mm to 25mm: Provides a moderate stance upgrades and improves the ride quality, particularly when cornering.
- 30mm to 40mm: Increases the track width. With the improvement of traction, the resistance to rollover is enhanced.
- 45mm to 50mm: Specifically for a wide-body kit. The added clearance allows you to install the bigger wheels and tires without rubbing issues.
Wheel Offset:
The STI wheel spacers reduce the wheel offset. Lower offsets make the wheels sit further out. For example, the stock offset is +55mm, then a +70mm offset wheel will sit further inside the wheel well. In this case, you can use 20mm wheel spacers to make the offset +50mm (70-20=50mm).
Bolt Pattern (PCD):
Wheel lug pattern is one of the most important factors in identifying wheel dimensions. Double-check the vehicle bolt pattern in your owner’s manual before buying a set. For example, 2014-2023 Subaru WRX STI: PCD=5×114.3mm, CB=56.1mm, Thread=M12x1.25mm.
Who Makes the Best STI Wheel Spacers?
High-end wheel spacers are produced with top-quality materials to provide optimum performance to the vehicle. For example, BONOSS forged active cooling STI wheel spacers are made by advanced machinery and undergo a series of safety tests before leaving the factory. BONOSS offers several key advantages that make their spacers a top choice.
1. Useful Active Cooling Function
With the same price as most rim spacers, BONOSS forged active cooling STI wheel spacers provide an active cooling function. Distributed in petal shape, these grooves allow the external cold air to flow continuously inside the wheel spacer when it rotates.
The air takes away the heat to actively dissipate heat for the brakes. Such BONOSS forged active cooling STI wheel spacers improve the cooling efficiency, reducing brake thermal decay, and improving road safety.
2. Aerospace-grade Aluminum Materials
All BONOSS forged active cooling STI hub-centric wheel spacers are made of forged 6061-T6 or 7075-T6 billet aluminum alloy. The tensile strength is up to 572 MPa and the yield strength is up to 503 MPa (as strong as aviation aircraft). High tensile strength gives it strong resistance to being pulled apart, making it resistant to bending and breaking.
3. Full-cone Seat with Zero Loosen
Full-cone seat design provides a larger contact area, more force acreage, and better fitting. This allows the studs and nuts to apply enough clamping force to lock the BONOSS forged active cooling STI aluminum spacers. In that case, the hub-spacer-wheel connection can be fastened firmly, meaning no vibration.
Final Verdict: Upgrade Your Car with BONOSS
From innovative active cooling benefits to certified materials and precise manufacturing, BONOSS forged active cooling STI wheel spacers are engineered to enhance your driving experience with safety, strength, and reliability. Discover the difference with BONOSS—built for drivers who demand excellence.
(Hi, I’m Kevin Brian, an experienced mechanical engineer. All articles, images, and videos are human-produced to ensure the best user experience. They are not generated by Artificial Intelligence (AI) Models or tools.)
