Tube Type Outer Envelope

• To be used with metal and rubber sealing rings or rim and flange
• Manufactured with a CNC machine, the tolerances of the machined rims are exact and will reduce the “out of roundness” found in normal expandable rims as well as improve the buffed roundness of the tire. The other major difference in a machined rim is the rim supports, which wear out the slots in normal expandable rims, are replaceable and bolt on and off. This feature prolongs the life of the rim and prevents buffing tires “out of round”.