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I have an older Shimano Ultegra Shifter that broke, and I am wondering how I can know what shifters are compatible with the gear set as a replacement? My broken shifter is on the right side and is a Shimano Ultegra ST-6510 9-speed. Are current generation Shimano 9-speeds backwards compatible with my older gear set? I've looked at this Sora shifter as a possible replacement. I am not so concerned about weight or performance and am only hoping to get a couple more years out of my older bike.

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  • I’d replace both shifters to avoid asymmetries in body position.
    – Michael
    Commented Jul 11, 2020 at 10:43
  • @Michael Interesting, I hadn't considered that. I wonder how different it will be and if I'll notice? I'm starting with just replacing the broken shifter, but I guess I'll see where I go from there. Thank you for pointing this out to me, I wouldn't have considered it.
    – Montana
    Commented Jul 11, 2020 at 17:33
  • Did it work? Got a vintage Trek with 7700 Dura Ace and want to put on R3000 shifters so i can run internal cabling.
    – Guy Longbottom
    Commented Aug 29, 2020 at 16:41
  • @GuyLongbottom A little late, but yes, it did work. I replaced my shifter with the sora I linked and it all worked fine for the most part.
    – Montana
    Commented Oct 25, 2020 at 21:11

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Any Shimano compatible 9 speed road shifter like the Sora you linked will work. While it will be visually different it will perform the same function. The last of these models were produced in 2007. While the Sora shifters you are looking at may be lower on the hierarchy list, they are likely equal to or better than your nearly the 20 year old technology you currently have. As new improvements are introduced Shimano eliminates the oldest technology and everything moves down a tier. Latest version of Ultegra is the previous version of Dura-Ace and it all moves down the line. My guess is you will be satisfied with a new Sora shifter.

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  • Thank you for this, it gives me all the information I need. I've gone ahead and ordered a Sora shifter and am excited to hear the newer Sora shifter will be similar or perhaps superior to my old shifter.
    – Montana
    Commented Jul 11, 2020 at 17:35

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