The 2011 Chevrolet Camaro SS rides on the Alpha platform with a 5x120mm bolt pattern and a 66.9mm factory hub bore — two specs that define your entire wheel selection on 5th-gen SS builds. Running 20x9.5 / 20x10.5 wheels with 275/35R20 / 305/35R20 tires and an offset in the +35 to +45mm range puts you in proven territory for this chassis, but there are critical clearance details to confirm before ordering. The 2010 and 2011 SS shipped with Brembo 6-piston front calipers as standard equipment. Those calipers are large and sit close to the inner barrel of the wheel. On 20-inch fitments narrower than 20x9, you risk contact at the inner lip — a 20x9.5 minimum with adequate offset is the safe floor. The factory 18-inch wheel is no longer relevant once you step to 20s, but the caliper geometry was designed around the 18-inch package, so inner barrel depth matters significantly more than it does on cars with single-piston slide calipers. For the 20x9.5 / 20x10.5 combination with 275/35R20 / 305/35R20 tires, confirm inner barrel depth against the Brembo caliper by measuring from wheel mounting face to the inner lip edge. A wheel with insufficient clearance will contact the caliper during steering lock on the front axle. Rear fitment is more forgiving on the SS due to the IRS layout — unlike solid-axle Camaros, the independent rear suspension means no pinion angle penalty when you widen the rear contact patch. The +35 to +45mm offset window listed here accounts for fender liner proximity under full compression, not just static ride height.

Available Tire Fitments