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Reviews (1)
Jan 18, 2018
May work for specific crank system
0 of 3 found this helpful It is not compatible with my DuraAce 7900, with a 34T Shimano flywheel for the rearderailuer. The ratio of two systems, DuraAce and Tiagra are different. You will end up losing one of the gear. My bike mechanic recommended not to install it. It may bounce back due to high tension to hit the frame. Do consult a proper bike mechanic.