Originally Posted by
maddog34
From Bike Radar....
What is cable pull ratio?
Cable pull ratio is the amount the derailleur moves for every millimetre of cable pulled through by the shifter. Microshift and Shimano use the same cable pull ratio for certain products, making their components compatible. The exception is Microshift’s Acolyte, Advent and Advent X groupsets that use the brand’s proprietary pull ratio.
The range is not compatible with SRAM drivetrain components because it uses a different cable pull ratio.
conclusion: the shop bone headed this swap, Badly.
determine the Seat tube size, then search: SRAM (seat tube size here) Top Pull Front Derailleur.
you can get a refund from the shop for THEIR MISTAKE, and use that to finance the correct Front Derailleur
then search for a different shop or insist on a less bone-headed mechanic.
and if the search results turn up Zero top pull SRAM Front derailleurs that match your pull ratio,,, get the pulley setup mentioned earlier.. Front Ders are NOT "precision shifting", ever.
and Welcome to the SRAM ZONE Zone zone zone....
maddog34 Hey - thanks so much for the insight and information. I am starting to feel a little snookered by the shop, and them not at the very least, reaching out to me about the situation with the FD compatibility issue.
As an aside, what I am appreciating more, are the benefits of doing ( or at least trying) to so your own maintenance at home. It offers such a greater opportunity to better understand your own bikes, components and evern components yo-u do not own yet, but likely need.