Old 05-03-18, 07:12 AM
  #3  
Quiglesnbits
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Tiagra 4700 started getting delivered on 2015 bikes. The biggest observable difference is the gear cables are fully internal instead of sticking out the sides like 4600. The 4600 crank is 5 bolt and the new one is 4 bolt along with the higher level sets, which is ultimately only an issue if you want to replace the chainrings. Functionally they SAY the brakes are better, but YMMV, and they SAY a long cage mech can get you to 34 gears on the back. Overall the set just has a few more of the bells and whistles of the higher end stuff, at a a lower pricepoint/higher weight. From a cost effectiveness perspective, unless your wheels only have 10-speed hubs, there would be no reason to upgrade to 4700, because if you were considering it at all, 5800 is marginally more expensive, and by most accounts quite a lot better.
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