Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Scrub Radius Description

Chevrolet Sonic Repair Manual / Chassis / Wheels/Tires / Wheels / Scrub Radius Description

Ideally, the scrub radius is as small as possible. Normally, the SAI angle and the centerline of the tire and the wheel intersect below the road surface, 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.

Replacement Wheels Description
Replace the wheel if any of the following conditions exist: The wheel exhibits excessive runout. The wheel is bent. The wheel is cracked. The wheel is severely rusted. The wheel is severe ...

Spare Tire Kit Installation
Installation Instructions Part Number 95280943 Procedure ...

Other materials:

Selecting a Station
Seek Tuning If the radio station is not known: Press SEEK to automatically search for available radio stations. Hold and drag to the left or right of the radio station to automatically search for available radio stations. Manual Tuning Continue pressing TUNE to manually change the rad ...

Blower Motor Replacement
Removal Procedure — Production Blower Motor Remove the passenger side instrument panel insulator. Refer to Instrument Panel Insulator Replacement. Remove the passenger side inflatable restraint instrument panel lower module. Refer to Instrument Panel Lower Airbag Replaceme ...

Intake Manifold Disassemble
Remove the fuel injection rail ground cable nut (1). Remove the 2 fuel injection rail bolts (2). Remove the fuel injection fuel rail assembly (3). Remove the intake manifold gasket (4). Remove the 2 manifold absolute pressure sensor bolts ...

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