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Old 07-22-20, 03:29 PM
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I replaced a Tiagra 4503 with a Sora and there was no perceivable change in shifting. I later repaired the 4503 and am using it on another bike. If the spring retaining tab broke on yours, as they often do, take a look at the following thread: Fixing a front derailleur with a broken spring retention tab (MacGuyver) . The repair was relatively easy and it is performing well.
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