If you drive a Subaru with a 5×100 bolt pattern and want access to the wider world of 5×114.3 wheels, the Function and Form 5×100 to 5×114.3 wheel adapter is exactly what your build needs. Whether you’re trying to fit aggressive offset wheels, clear big brakes, or simply upgrade your style, this hubcentric adapter offers a bolt-on, safe, and precise solution.

Made specifically for Subarus using a 5×100 bolt pattern with a 56.10 mm center bore, this adapter is CNC-machined from hot-forged aircraft-grade aluminum. That means you’re getting high tensile strength in a lightweight package—perfect for reducing unsprung mass without sacrificing durability.

Unlike universal adapters, the Function and Form 5×100 to 5×114.3 wheel adapter is hubcentric on both sides. The 56.10 mm center bore fits Subaru hubs with precision, eliminating the vibration and imbalance that comes with flat or non-centered spacers. This results in smoother high-speed performance, improved component longevity, and overall better ride quality.

This adapter is perfect for Subaru owners looking to install 5×114.3 wheels from WRX STI models, aftermarket wheel brands like Enkei, Rays, and Work, or even OEM wheels from other platforms. It gives you the flexibility to run wider tires, deeper lips, or brake kits that demand more clearance.

Unlike some adapters with pressed-in studs, this version is designed to work with your existing Subaru studs and includes open-ended lug nuts for a clean install. It’s threaded with M12x1.25, the standard thread pitch for most Subarus, including WRX, Impreza, Legacy, Outback, and Forester models up through the mid-2010s.

You can choose between 15mm and 20mm thicknesses depending on how much clearance or stance adjustment you need. Whether you’re tucking flush or pushing wheels out for a wider track, you’ll get a predictable and safe outcome.

Micro-channel grooves are integrated into the mounting face to prevent the spacer from sticking to the hub or wheel during removal—especially after heat cycles or exposure to moisture. Straight knurled edges provide added grip during install and removal for quick adjustments without the fight.

Finished in Function and Form’s Undercover Black, these adapters disappear behind your wheels while providing corrosion resistance for year-round use.

Each set is sold in pairs and includes open-ended lug nuts—perfect for converting one axle or buying two sets for all four corners.

Specs at a Glance:

• Converts 5×100 to 5×114.3 bolt pattern

• Center Bore: 56.10 mm (Subaru-specific fitment)

• Vehicle Thread: M12x1.25

• No wheel studs; uses factory studs with included open lug nuts

• Material: Hot-forged aircraft-grade aluminum

• Spacer Sizes: 15mm and 20mm

• CNC-machined with knurled edges and micro-channel grooves

• Finish: Undercover Black

• Sold in pairs (2 adapters with lug nuts)

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