Rubber, Tires, Foam & Elastomer Manufacturing worked example

Retread Cost at 65% casing inspection acceptance rate: a worked example

This worked example runs the retread cost numbers for a tougher week than the baseline: 65% casing inspection acceptance rate instead of the typical 90%. Estimate the total cost to retread a batch of tire casings including tread rubber, labor, acceptance loss, and curing setup.

The inputs for this scenario

  • Casings entering the retread run: 120 casings (held at the documented default)
  • Tread rubber plus labor per casing: 45 $/casing (held at the documented default)
  • Casing inspection acceptance rate: 65 % (the input this scenario stresses; the baseline uses 90)
  • Mold and curing setup charge: 400 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total retread cost = casings x tread+labor rate x acceptance rate% + setup charge.
  • Total retread cost works out to 3,910 $ at these inputs, and this is the headline figure for the scenario.
  • Retread cost per unit works out to 32.58 $ / piece at these inputs.
  • Variable retread cost works out to 3,510 $ at these inputs.
  • Fixed retread cost adder works out to 400 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where casing inspection acceptance rate sits at 90% and the headline result is 5,260 $, this scenario comes in 25.67% below the baseline at 3,910 $.
  • Use it when quoting a retread batch, comparing retread economics to new tires, or setting a minimum batch size that keeps per-casing cost acceptable. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Total retread cost: 3,910 $ (headline result)
  • Retread cost per unit: 32.58 $ / piece
  • Variable retread cost: 3,510 $
  • Fixed retread cost adder: 400 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Retread Cost calculator, set casing inspection acceptance rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.