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By Michelin   

Welding on Rims

Welding on a rim or wheel will change the properties and strength of the metal. Never apply heat or weld on a wheel, especially when the tyre is still mounted on the rim.

The temperature of welding can reach 6000 degrees Celsius on contact. While as much of 50% of the heat is lost through conduction, the surrounding metal is still heated to extremely high temperatures which ultimately heats the air inside the tyre. When the rubber inside the tyre reacts to the heat, it generates gases that can lead to an internal fire. Eventually, the rising heat and pressure becomes too great for the tyre and rim to contain. While the internal changes will not be apparent to the outside observer, the severe increase in temperature and pressure will cause the tyre and wheel to catastrophically explode without warning.



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