Understanding the 2015 Subaru WRX wheel specs is essential for anyone looking to modify or simply appreciate the engineering that makes this model a rally-inspired icon. This specific year marked a significant transition for the WRX, moving to a new platform that influenced everything from offset to bolt pattern. The correct wheel specifications ensure proper fitment, optimal performance, and the preservation of the vehicle's handling dynamics right from the factory.
Factory Specifications and Standard Equipment
When rolling off the lot in 2015, the Subaru WRX came equipped with specific wheel dimensions that were carefully selected to match the suspension and braking hardware. The standard setup provided a baseline of performance that enthusiasts often refer to when evaluating aftermarket options. These OEM specifications are the starting point for any discussion regarding fitment, load capacity, and overall compatibility.
Diameter, Width, and Bolt Pattern
The factory 17-inch alloy wheels were a defining visual feature of the 2015 WRX, providing a low profile that complemented the aggressive stance. The specific measurements for these OEM wheels are critical for anyone looking to replicate the exact look or upgrade without running into clearance issues. The following details outline the core specifications for the standard equipment.
Decoding Offset and Backspacing
The offset of -35 mm is a negative figure, meaning the mounting surface is positioned 35 millimeters inboard from the centerline of the wheel. This specific setting is designed to push the wheel outward slightly, creating the wide track that contributes to the car's stable high-speed grip. Backspacing, the distance from the mounting surface to the back edge of the wheel, is similarly affected by this negative offset, resulting in a setup that fills the fender wells effectively.
Load Rating and Tire Compatibility
Matching the wheel to the correct tire size is the next logical step in understanding the 2015 Subaru WRX wheel specs. The 17-inch diameter dictates that the tire size typically sits at 225/45R17, although some trims offered a 225/40R19 setup for a more sporty appearance. Choosing a load rating that meets or exceeds the OEM rating of 91V is vital for maintaining the structural integrity of the wheel under stress, especially for drivers who enjoy spirited driving sessions.
Material Construction and Durability
Most 2015 WRX models featured cast aluminum alloy wheels, a choice that balances weight, strength, and cost effectively. This material construction contributes to the unsprung weight of the vehicle, which directly impacts suspension response and ride quality. The manufacturing process used for these OEM wheels ensures they can handle the torque output of the turbocharged engine and the rigors of various road conditions without compromising safety.
Aftermarket Considerations and Upgrades
Drivers looking to modify their 2015 WRX often wonder about the limits of wheel sizing. While the factory 17-inch wheels provide an excellent platform, the 5x114.3mm bolt pattern is a common specification shared by many aftermarket brands, offering a wide selection of options. When deviating from the stock -35mm offset, it is crucial to calculate the necessary spacing to avoid rubbing against the suspension components or fender liners during full lock or compression.
