RSX left shifter - pull ratio?

Fatmat · Feb 16, 2024

Hello! I have an old RSX (ST-A410). It pulls 13mm over two stages, I’m convinced it’s a triple but came from a stock 2x7 chaindrive. Thought I’d check with the pros!

hamster · Feb 16, 2024

If it's got two big clicks then it sounds like a triple.

pigman · Feb 16, 2024

But if it's a double, it will have 2 clicks downwards. A soft one for trimming when you want that slight movement to ride big/big and then a bigger clunk to drop to the small ring

benjabbi · Feb 16, 2024

These I believe used the same shifter for double or triple. They also used an mtb style top swing front mech and the associated pull ratio. The later evolution went to a normal style road front mech.

Fatmat · Feb 16, 2024

Thanks guys, appreciate the feedback. I’ve broken out the digital calipers, shifting up with the main lever (going from inner chainring outwards) it’s pulling 8mm of cable and then the next click is 5.6mm. (I do appreciate that I could just stop messing about and mount the thing!

)

chambo34 · Feb 22, 2024

triples had a little 'TRIPLE' transfer on them.

RSX left shifter - pull ratio?

Fatmat

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hamster

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pigman

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benjabbi

Fatmat

chambo34

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