Bike Forums - View Single Post - RS505: Poor shifting going to smaller rear cog
Old 03-10-18, 09:10 PM
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jwh20 
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I'm going with mis-adjustment. The 105 groupset is first rate IMHO. I have a 105 in that vintage as well as an Ultegra, both work flawlessly and it can't say that I can tell the difference while riding. I think the Ultegra saves a few grams but not much beyond that.
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