Pennsylvania Code
Title 67 - TRANSPORTATION
Part I - Department of Transportation
Subpart A - Vehicle Code Provisions
Article VII - Vehicle Characteristics
Chapter 175 - VEHICLE EQUIPMENT AND INSPECTION
Subchapter G - RECREATIONAL, SEMI AND UTILITY TRAILERS
Section 175.124 - Tires and wheels

(a) Condition of tires and wheels. Tires and wheels shall be in safe operating condition as described in § 175.130 (relating to inspection procedure).

(b) Tire standards. A trailer shall have tires that were manufactured in conformance with standards contained in Chapter 159 (relating to new pneumatic tires). See 75 Pa.C.S. § 4525 (relating to tire equipment and traction surfaces). Tires with equivalent metric size designations may be used.

(c) Radial ply tires. A radial ply tire may not be used on the same axle with a bias or belted tire.

(d) Different types of tires. Tires of different types and sizes, such as one snow tire and one regular tire or bias, belted or radial tire, may not be used on the same axle, except in an emergency.

(e) Nonpneumatic tires. No trailer operated on a highway shall be equipped with nonpneumatic tires.

(f) Ice grips or studs. A tire may not be equipped with ice grips or tire studs of wear-resisting material which have projections exceeding 2/32 inch beyond the tread of the traction surface of the tire.

(g) Tires and rims. The axles of a vehicle specified under this subchapter shall be equipped with the number and type of tires and rims which have a load rating equal to or higher than those offered by the manufacturer.