Ridetech 68-72 GM A-Body w/ Hub Spindle & (Narrowed) 57.25in Flange to Flange Width Momentum Chassis

Built for the 1968-1972 GM A-body platform, this Ridetech Momentum Chassis with AFX hub spindles and a narrowed rear housing fits the Chevrolet Chevelle, Pontiac GTO, Oldsmobile Cutlass, Buick Skylark, and related models.

One Chassis, Many Muscle Cars

The GM A-body platform covers some of the most iconic muscle cars of the late 1960s and early 1970s. Whether you are building a Chevelle SS, a GTO, a 442, or a Skylark, this chassis gives all of them the same modern foundation. The body mounts, steering, suspension geometry, and rear housing are all designed specifically for these cars.

Hub Spindles and Narrowed Rear

AFX hub spindles pair with included brake brackets for compatibility with modern brake packages. The narrowed 57.25-inch rear housing pulls the wheels inboard to accommodate wider tires and deep-dish wheels. If you are planning an aggressive wheel and tire setup, this is the configuration to choose.

What You Get

This is a complete chassis: frame, upper and lower control arms, front sway bar, AFX hub spindles with brake brackets, steering components, 4-link bars, body bushings, and the narrowed rear housing with axles. Your A-body shell drops right on.

The Foundation Matters

Individual suspension upgrades work against factory geometry that was designed for a different era. The Momentum Chassis starts from a clean sheet, putting every bushing, pickup point, and control arm at the angles they need to be for modern performance. The 4-link rear alone eliminates the compromises of leaf springs, and when you combine it with redesigned front geometry, the car drives like it was built this year.