S197 Ford Mustang Wheels

The S197 GT runs 17x8 or 18x8 from the factory. Aftermarket upgrades most commonly go to 19x10 or 20x10 on a square setup, or 19x10 front with 19x11 rear on a staggered setup. Both configurations clear the standard front brakes without modification. Project 6GR's verified fitments for the S197 GT are published in the fitment tables above.

All 2005-2014 S197 Mustangs — GT, GT500, and Boss 302 — use a 5x114.3 bolt pattern (also expressed as 5x4.5 inches). The center bore is 70.6mm across every trim in the production run. Lug hardware is M12x1.5 with a factory torque spec of 100 ft-lbs.

Yes. The 5x114.3 bolt pattern and 70.6mm center bore are consistent from the S197 through the S550 and into the S650. Project 6GR's fitment specs are the same verified setup across all three generations. A wheel that fits an S197 at the correct offset will fit an S550 and S650 at the same specification.

A 19x11 or 20x11 rear wheel at +50mm offset fits the S197 GT on a staggered setup without spacers or fender work. On a square setup, 19x10 or 20x10 at +35mm runs clean on all four corners. These are Project 6GR's confirmed fitments for the platform, verified against the factory suspension and brake geometry

Yes. The 19x10 at +35mm is Project 6GR's primary recommended fitment for the S197 platform — square or as the front wheel in a staggered setup. It clears the factory GT brakes and the four-piston Brembo front caliper on the Boss 302 without modification.

The GT and GT500 share the same 5x114.3 bolt pattern and 70.6mm center bore. The difference is the factory wheel size — the GT shipped on 17- or 18-inch wheels, while the GT500 used 18x9.5 to 19x9.5 from the factory. On aftermarket fitment, both variants run the same Project 6GR setup: 19x10 +35 front and 19x11 +50 rear, or the equivalent 20-inch pairing.

Yes. The Boss 302 was equipped with four-piston Brembo front calipers as standard equipment. Project 6GR's 19x10 +35mm front wheel clears the Boss 302 Brembo application without spacers or modifications. This clearance is verified and published in the fitment table above.

For performance-focused builds — track days, road courses, high-power GT500 applications — 19-inch wheels are the better choice. The taller sidewall provides more compliance and grip. For street-focused builds where stance and visual proportion are the priority, 20-inch fitment fills the S197 arch with a lower-profile tire and a more aggressive appearance. Both diameters are fully verified for the platform.

Staggered runs a wider rear wheel than the front — 19x10 or 20x10 up front, 19x11 or 20x11 out back — to increase the rear contact patch and improve visual stance. Square runs the same size on all four corners, which enables tire rotation and produces more neutral handling. For S197 owners who track the car, square is the more practical setup. For street and show builds, staggered is the more common choice.

Yes. Spun Forged (flow formed) wheels are significantly stronger than conventional cast wheels due to the pressure-forming process used on the barrel. The material grain structure is compressed and aligned during manufacturing, which increases tensile strength without adding weight. P6GR's Spun Forged lineup is JWL and VIA certified and carries a lifetime structural warranty. For extreme power applications, the Monoblock Forged line is machined from a single 6061-T6 billet and is the appropriate choice.

Yes. The verified offsets on this page are compatible with standard and moderate lowering setups. For builds with aggressive suspension drops, non-standard brake kits, or wide-body configurations, contact the team to confirm clearance for your specific setup before ordering.

The S197-generation GT350 runs a different fitment profile compared to the GT, GT500, and Boss 302. Project 6GR does not currently have a confirmed spun forged fitment for the GT350. The custom monoblock forged line is the correct path — built to exact diameter, width, and offset for that car. Contact the team to start the conversation.

There is a large selection of wheels available for the S197 Ford Mustang, but the best of the best utilize precision-engineering, direct fitment, and precise measurements to ensure the perfect setup. That's where Project 6GR comes in. We're Mustang platform experts, and one of the only brands that manufactures specifically for the chassis.