Where should the thickest portion of a shim be placed to move camber more positive?

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Multiple Choice

Where should the thickest portion of a shim be placed to move camber more positive?

To increase positive camber you want to tilt the wheel so the top of the wheel moves outward relative to the bottom. Placing the thickest portion of the shim at the top raises the upper mounting point, which rotates the wheel plane toward positive camber. In this setup, doing that between the rear spindle and axle has the desired effect because the top surface is being augmented, pushing the top of the wheel outward. Bottom-side thick shims would tilt the wheel the other way, toward negative camber, so the top placement is the one that makes camber more positive.

To increase positive camber you want to tilt the wheel so the top of the wheel moves outward relative to the bottom. Placing the thickest portion of the shim at the top raises the upper mounting point, which rotates the wheel plane toward positive camber. In this setup, doing that between the rear spindle and axle has the desired effect because the top surface is being augmented, pushing the top of the wheel outward. Bottom-side thick shims would tilt the wheel the other way, toward negative camber, so the top placement is the one that makes camber more positive.

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