In 1974, Peugeot opened a custom bicycle frame shop (the Atelier Prestige) which specialized in the production of custom Reynolds-tubed framesets using thin-gauge butted steel tubing. These custom frames were designated PY-10. Similar to a PX-10 in design and styling, a PY-10 could be ordered to customers' individual specifications. Options included, but were not limited to, geometry and frame size, color, components, and braze-ons.
In 1977, the UO-10 was introduced, followed the next year by a slightly heavier road model, the UO-9. The UO-10 was largely the same as the UO-8 but with aluminum alloy cotterless crankset and aluminium alloy rims. The UO-9 was essentially the same as the UO-10 but had cheaper and heavier steel rims. In 1980, the PH-8 displaced the UO-8 as the entry-level Peugeot road bicycle.