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01 Relays and Modules02 Sensors and Switches03 Maintenance04 Engine, Cooling and Exhaust05 Powertrain Management06 Transmission and Drivetrain07 Brakes and Traction Control08 Starting and Charging09 Power and Ground Distribution10 Steering and Suspension11 Heating and Air Conditioning12 Restraint Systems13 Accessories and Optional Equipment14 Body and Frame15 Cruise Control16 Instrument Panel, Gauges and Warning Indicators17 Lighting and Horns18 Windows and Glass19 Wiper and Washer Systems
Chevrolet HHR L4-2.2L (2007)10 · Steering and Suspension
10 · Steering & suspension

Alignment: Specifications (page 5 of 8)

Make
Chevrolet
Model
HHR
Engine
L4-2.2L
Year
2007
Section
Alignment
Steering and SuspensionSpecifications · page 5 of 8
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causing a positive scrub radius. With struts, the SAI angle is much larger than the long arm/short arm type of suspension. This allows the SAI angle to
intersect the camber angle above the road surface, forming a negative scrub radius. The smaller the scrub radius, the better the directional stability.
Installing aftermarket wheels that have additional offset will dramatically increase the scrub radius. The newly installed wheels may cause the centerline
of the tires to move further away from the spindle. This will increase the scrub radius.

A large amount of scrub radius can cause severe shimmy after hitting a bump. Four-wheel drive vehicles with large tires use a steering damper to
compensate for an increased scrub radius. Scrub radius is not directly measurable by the conventional methods. Scrub radius is projected geometrically
by engineers during the design phase of the suspension.

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Parts & tools for this job For 2007 Chevrolet HHR 2.2L

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