Thread: Shimano 105 5800 GS RD & Tiagra 4700?
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Old 07-26-16 | 02:58 AM
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Bike Gremlin
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Bikes: Heavy, with friction shifters

Originally Posted by Abu Mahendra
question is: will the 105 5800 RD be able to take a 34T cog? Remember that, on paper, 105 5800 is 32T max...
I believe it will. Shimano is rather conservative in their recommendations. Since the 5800 GS RD is nominally for max 32 teeth, I'm sure extra 2 won't be a problem.

I've set up Sora RD for 34 teeth cassette and it works fine.
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