Originally Posted by 1982 Peugeot brochure

Two of our newest 12-speed bicycles, the P8 and PH10, are manufactured through a process developed exclusively by Peugeot engineers. To begin with, we make our own tubing, called “CARBOLITE 103”. This is a special, thin-walled tubing made from a composition in carbon steel unique to Peugeot. This tubing combines strength and resilience and produces the unusual durability of our bicycles. Unlike other manufacturers who simply press-cut their tubes, Peugeot uses a special milling machine to miter the ends of the tubing to exact tolerances. Finally, after the tubing is prepared, it is fitted precisely on a jig and INTERNALLY BRAZED. This process allows the tubes to be strongly joined without requiring the added support and weight of external lugs. The result is a bicycle with a clean finish, superior strength and an incredible weight of only 28 pounds.