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Caster Height Change Calculator

See how switching wheel diameters raises or lowers the mounting height of a caster, before a replacement throws a workbench or rack out of level.

A caster’s mounting height is tied to its wheel diameter: half of any diameter difference lands directly in the height of the equipment. Enter the current and proposed diameters and the calculator returns the signed change, so a drop from 8 inch to 6 inch wheels shows as a one inch loss of height.

Use it before replacing a full set, especially on workbenches, conveyor stands, and equipment where a level surface matters. A matched diameter keeps the height; a smaller wheel needs a shim, a spacer, or a different caster series to compensate.

Inputs

Wheel diameters

Range: 1–24 in

Range: 1–24 in

Result

Mounting height change
-1.000

What to check

  • Take half of the diameter difference, not the whole difference.
  • Confirm the plate and fork style match before comparing overall heights.
  • Check the equipment for leveling feet or shims that can absorb the change.

Related calculators

This is geometry for casters with the same mounting style and fork. Overall height also depends on the plate and fork; verify the published overall height dimension for the exact part.