The Simplex 543 rear gear only uses two cables at the very rear of the transmission system. The main cable runs from the gear lever all the way to the toggle chain on the rear gear and controls the throw of the gear. The second cable is connected to the main cable with a solderless niple just in front of the twin cable stop on the chainstay and at the other end to a device on the rear gear that 'automatically' adjusts the chain tension.
Hilary Stone, Bristol, England
Amir Avitzur wrote:
> When helping a friend assembled his reshly repainted '58 Peugeot PLX-10 or
> '59 PX-10
> I noticed something strange:
>
> the right chainstay had a double cable derailleur cable-boss
> the same chainstay had a single cable cable-boss near the BB
> the down tube had a single cable cable-boss near the BB
>
> If the bike was designed to use a twin cable Simplex 543,
> why aren't all cable bosses double?
>
> My Hirondelle, which uses an "endless" cable has double cable guides
> throughout.
>
>
>
> Anyone have close-up photos of a '58/'59 PX-10's cable guides?
> Anyone have the instructions for the 534 rear derailleur?
>
> Amir Avitzur
> Ramat-Gan, Israel