Track and Wheelbase definition?

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#10 (permalink)

02-26-2008, 11:21 AM

strictlypersonl strictlypersonl is offline

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Join Date: Nov 2003

Location: New Britain, CT

Cobra Make, Engine: Size 10 Feet

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Unfortunately backspacing is not measured from the bead, it's measured from the outer edge of the casting. Typically a wheel is 3/4"-1" wider overall than its "nominal" width. Your 6" wheel might be 7" total width so that 3.25" backspacing puts the wheel mounting surface 1/4" in from the centerline of the wheel. Which is why I much prefer to specify mounting-surface-to-centerline rather than backspacing.

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