The Sonic brings agility
and a fun-to-drive feel that is rare in the segment. Engineers who also work on
the Corvette tuned the Sonic's confident ride and handling, giving it a more
direct and athletic feel, while balancing the vehicle for the broad range of
driving conditions in North America.
All models feature a
MacPherson strut front suspension with coil springs and stabilizer bar, and a
semi-independent, torsion beam axle-mount compound link-type rear suspension, featuring a robust, tubular V-shape beam, with gas-charged shocks. The front
and rear tracks are identical at 59.4 inches (1,509 mm), for well-planted
stability and excellent balance.
Electronic power steering
is standard and features a wear compensator that continually adjusts the system
interaction with the steering gear to ensure precise steering action over the
life of the system.
Sonic's body structure is
designed to be one of the stiffest in the segment. Its rigidity enabled
engineers to tune the ride and handling more precisely. Sonic's unique "flat top
frame" cradle, for example, assures optimal stiffness in the front chassis
portion of the vehicle. The rear axle is essentially a straight axle without
contour for packaging restraints and reduced noise, vibration and
harshness.
A range of wheel sizes is
available, including 17-inch wheels and sport tires. Power-assisted front disc
and rear drum brakes are standard, along with a four-channel anti-lock braking
system. The four-sensor system ? one at each wheel ? incorporates electronic
brake force distribution, which balances braking performance based on such
factors as road conditions and the weight of passengers and/or
cargo.