Shimano Positron

[CrossFred1978]

Hi there,
Was chatting at the weekend with an old colleague and mentor of mine from the Lbs. He reminded me
of Positron gearing and how it was my baptism of fire when i started in the early nineties.
Anyone remember or even still have a positron equipped bike, i seem to recall it being a real ball ache to set up correctly.

Andy

 

[vcballbat]

Raleigh started using the Shimano Positron index shifting on their Merlin and Misty roadsters back in 1979

https://www.macearchive.org/films/atv-today-30051979-raleigh-bicycles

 

[24pouces]

The first Shimano indexed system : indexation was in the derailleur parallelogram and a piano string replaced the classic cable. My Motobécane Vélover use a 6 speeds cluster.