Buick REGAL Release Note page 4

Twenty-inch, 5-twin spoke polished alloy wheels and summer-rated performance tires
are optional on GS.
Additional options include a power sunroof on all Regal models, and navigation with the
Buick IntelliLink system on 1SP, 1SR and GS (requires sunroof).
Chassis and suspension
The Regal's chassis and structural systems were developed globally, and they give the
Regal the handling and dynamics of a luxury import sport sedan with the quiet, refined
ride expected of a Buick.
Regal was engineered with one of the most rigid body structures in the segment, which
supports more precise suspension tuning and a quieter ride. Additional features include:

Long wheelbase of 107.8 inches (2738 mm) gives the Regal refined, well-
balanced vehicle dynamics and supports comfortable ride tuning

Independent MacPherson strut-type front suspension, a four-link independent
rear suspension, electric rack-and-pinion power steering and optimized four-
wheel disc brakes are designed to balance ride comfort and sportiness. Models
equipped with the 2.0L turbo engine feature larger brakes and variable-effort
power rack and pinion steering

Regal GS features a four-wheel independent suspension with a unique High
Performance Strut (HiPer Strut) front suspension design. HiPerStrut improves
ride and handling by reducing torque steer; improving vehicle sensitivity to tire
irregularities and wheel balance; more linear and communicative steering
through improved camber control; and improved impact isolation on bumps and
rough surfaces.

Latest-generation electronic stability control (StabiliTrak), anti-lock brake system
(ABS) and traction control system (TCS) are standard.
A family of 17-inch, 18-inch, 19-inch and 20-inch wheels is offered on the Regal.
Regal with eAssist (standard on 1SL, 1SN and 1SP) is equipped with standard 17-inch
alloy wheels with low rolling-resistance tires. 1SN and 1SP models with the optional
turbo engine have 18-inch alloy wheels (chrome wheels are available), while the 1SR
with the standard turbo engine is equipped with 19-inch painted machined alloy wheels.
GS is outfitted with standard 19-inch 5 twin-spoke alloy wheels; 20-inch alloy wheels
with summer-only tires are available.
Interactive Drive Control
Buick's Interactive Drive Control System is available on the Regal Turbo (1SR) and
standard on Regal GS, and adapts damping and other driving functions to drivers'
preferences. It includes 19-inch wheels. While the Regal Turbo offers Interactive Drive
Control with the choice of a standard adaptive setting, a more comfortable Tour mode
and a Sport mode, the system in the Regal GS is deliberately tuned for those who enjoy
a higher level of performance: