If a tire with test pressure is 450 psi and is in RFI condition, to what pressure should it be stored?

If a tire with test pressure is 450 psi and is in RFI condition, to what pressure should it be stored?

• A. 225 psi
• B. 150 psi
• C. 100 psi
• D. 450 psi

Answer: (C)

When a tire has been proof-tested to a high pressure and is in a non-service storage condition (RFI), the storage pressure should be a small fraction of the test pressure. This reduces internal stresses and prevents permanent deformation while the tire sits unused. For a 450 psi proof pressure, storing at about 20-25% of that pressure is typical. 450 psi × ~0.22 ≈ 100 psi, which is why 100 psi is the recommended stored pressure. Storing at half or the full test pressure would keep too much internal load and isn’t appropriate for long-term storage, while 450 psi isn’t a storage pressure at all.

When a tire has been proof-tested to a high pressure and is in a non-service storage condition (RFI), the storage pressure should be a small fraction of the test pressure. This reduces internal stresses and prevents permanent deformation while the tire sits unused.

For a 450 psi proof pressure, storing at about 20-25% of that pressure is typical. 450 psi × ~0.22 ≈ 100 psi, which is why 100 psi is the recommended stored pressure. Storing at half or the full test pressure would keep too much internal load and isn’t appropriate for long-term storage, while 450 psi isn’t a storage pressure at all.