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:

Headlining Trim Panel Replacement (Sedan without Sunroof)
Headlining Trim Panel Replacement Callout Component Name Warning: Do not attempt to repair or alter the head impact energy-absorbing material glued to the headliner or to the garnish trims. If the material is damaged ...

Intake Manifold Tuning Valve Actuator Replacement
Intake Manifold Tuning Valve Actuator Replacement Callout Component Name Preliminary Procedure Properly raise and support the vehicle. Refer to Lifting and Jacking the Vehicle. 1 Intake Manifold ...

Engine Front Cover and Oil Pump Installation
Special Tools EN-952 Fixing Pin EN-953-A Fixing Tool EN-49977-100 Transmitter Disc Fixation EN-49977-200 Fixing Tool For equivalent regional tools, refer to Special Tools. Note: Mind the guide sleeves when installing engine front cover. Install the engine front ...

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