Suitable for use: Periodic review advisable

We have been making retail sales of 22-foot platform bodies for four years. Over this time there has been a gradual shift in our customer base and in the use for which these bodies are purchased. Four years ago, 45% of our 22-foot platform bodies were installed on vehicles of 33,000 pounds GVW or less; today, that number is closer to 30%. Are these bodies still considered suitable for use with vehicles 33,000 pounds GVW or less?