S550 Ford Mustang Shelby GT500 Wheels

The GT500 requires a minimum 20-inch wheel due to its 16.5-inch front Brembo caliper package. The factory fitment is 20x11 front and 20x11.5 rear, running a staggered 305/30ZR20 front and 315/30ZR20 rear tire. Project 6GR offers verified GT500 fitments in 20x11 at +14 and +9 offset (front) and 20x11.5 at +43 offset (rear) — both validated for full Brembo clearance without spacers.

The 2020-2022 Shelby GT500 uses a 5x114.3 bolt pattern with a 70.6mm hub bore — consistent across all S550 generation Mustangs. Project 6GR wheels are machined to the 70.6mm spec for a true hub-centric fit, which eliminates vibration at high speed and ensures the wheel is centered on the hub rather than on the lug hardware.

Yes. The GT500's front Brembo fixed calipers physically cannot accommodate a 19-inch wheel. The caliper housing extends beyond the clearance profile that 19-inch spokes allow. Unlike the GT350, which can be run on both 19 and 20-inch setups with the right spoke geometry, the GT500 is 20-inch only front and rear.

Not all aftermarket wheels will. The GT500's fixed front Brembo calipers require specific spoke clearance dimensions that differ from standard S550 wheels. Wheels not designed with the GT500 caliper geometry in mind risk contact under load. Project 6GR's GT500 fitment was developed with caliper clearance as a primary engineering requirement — every size and offset in the GT500 lineup is verified to run without contact.

Both setups run the same 20x11 front and 20x11.5 rear dimensions with identical 315/30R20 rear tire sizing. The difference is front offset. The Street setup runs +14 front offset for a proportionate stance that works on stock or mildly lowered suspension. The Aggressive setup drops to +9 front offset, moving the wheel face further outboard for a more planted look — best suited to cars running negative camber or coilover suspension. If you are unsure which applies to your build, talk to the fitment team before ordering.

The OEM GT500 steel wheels weigh 36 lbs (front) and 35 lbs (rear) per corner. Project 6GR's TEN in GT500 spec weighs 28.25 lbs front and 26.65 lbs rear — saving 7.75 and 8.35 lbs per corner respectively, for a total set savings of 32.20 lbs. The SEVEN saves 22.20 lbs total across the set. On a car with 760hp, reducing 30+ lbs of unsprung rotating mass has a measurable effect on acceleration, brake response, and suspension behavior.

Yes. Spun forged construction (also called flow forming) produces the wheel barrel under heat and pressure, aligning the grain structure of the aluminum for significantly higher tensile strength than cast alternatives. Project 6GR spun forged wheels are JWL and VIA certified and carry a lifetime structural warranty. For owners running the car at sustained track speeds or making high-horsepower passes, the fully forged monoblock option — machined from a single 6061-T6 billet — offers the highest strength-to-weight ratio available.

You can run a square setup on the GT500, using 20x11 at matching offsets front and rear with 315/30R20 on all four corners. The OEM alternate spec does this at +32 all around. Project 6GR can accommodate this configuration — talk to the fitment team about offset matching for your specific setup. The staggered setup (305 front, 315 rear) is the more common choice and is what P6GR's validated setups are built around.

Spun forged wheels (TEN, FIVE, SEVEN) start with a cast aluminum core that is then flow-formed under heat and pressure, which works the barrel material to increase strength and reduce weight. Fully forged monoblock wheels start from a single solid billet of 6061-T6 aerospace aluminum pressed under thousands of tons of force — the grain structure runs continuously through the entire wheel. Fully forged wheels offer greater strength, lighter weight, and allow for more aggressive geometries. For the GT500, both options are structurally validated. The fully forged option is available as a custom order.

Yes. All Project 6GR GT500 fitments are compatible with the OEM TPMS sensors from your GT500. The wheel design accounts for sensor mounting clearance and the valve stem positioning that the OEM system requires. No sensor replacement or reprogramming is needed at install.

Unsprung weight — the mass your suspension manages rather than supports — directly affects how quickly the suspension can respond to road inputs, how efficiently the brakes scrub speed, and how much rotational inertia the engine and drivetrain have to overcome. On the GT500, the wheels and tires are the largest single source of unsprung rotating mass. Reducing that weight improves acceleration response, shortens brake distances, and sharpens steering feel — particularly in high-speed corners where suspension compliance matters most.

Unsprung rotating mass has a multiplied effect on performance compared to the same weight carried in the body. Engineers commonly cite a 2 to 4x multiplier: removing 1 lb from the wheel and tire assembly feels like removing 2 to 4 lbs from the car's body in terms of acceleration, braking, and handling response. The multiplier exists because rotating mass requires additional energy to accelerate and decelerate beyond its static weight, and because unsprung mass directly loads the suspension and braking system with every road input.

The OEM GT500 Carbon Fiber Track Pack wheels are among the lightest factory options ever offered on a production Mustang. The P6GR TEN in GT500 sizing is competitive with that spec in real-world terms while offering a significant advantage in durability and cost of ownership. Carbon fiber wheels are brittle on road debris and expensive to replace after a single hard curb strike. Our forged wheels uses aerospace-grade 6061-T6 aluminum and is covered by a lifetime structural warranty — it absorbs the kind of daily and track punishment that carbon fiber cannot.