This industry comprises establishments primarily engaged in the merchant wholesale distribution of new and/or used tires and tubes for passenger and commercial vehicles. Cross-References. Establishments primarily engaged in-- ? Merchant wholesale distribution of other new automobile parts and accessories--are classified in Industry 423120, Motor Vehicle Supplies and New Parts Merchant Wholesalers; and ? Merchant wholesale distribution of other used automobile parts and accessories--are classified in Industry 423140, Motor Vehicle Parts (Used) Merchant Wholesalers.