Anyone need a spare...
 

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[Closed] Anyone need a spare positron gear system for their 80s bike

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Posts: 41395
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Rare piece of history. We all have this to thank for indexed gears!

http://www.ebay.co.uk/itm/311928248719


 
Posted : 25/08/2017 2:03 am
Posts: 16216
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Not even seen one of those before.

So what's going on under the black plastic cover saying "positron"?

Is the indexing done on the mech instead of the shifter?

Interesting find! 🙂


 
Posted : 25/08/2017 2:16 am
Posts: 13601
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Never heard of positron before- interesting stuff!!


 
Posted : 25/08/2017 7:30 am
Posts: 11884
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The most weird thing about it was the solid wire in the cable, which pushed as well as pulled the derailleur. No return spring needed.


 
Posted : 25/08/2017 7:35 am

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