Thread: FD mount bracket too high
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Old 07-05-18 | 07:21 PM
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Originally Posted by jmess
The smallest gap I can get between my Ultegra 8050 DI2 FD cage and my big chain ring teeth (50 tooth ring) is between 3.7-4mm. It is my understanding the Shimano spec is 1-3mm. The FD mount bracket riveted on the seat tube is a couple of MM too high and the FD is mounted as low as it can go. Should I be worried about this? The FD seems to shift okay and I haven't had any dropped chain issues so far. The frame is used by some Pro Teams which I would imagine run 50/34 cranks at times. So I am wondering how this would be considered normal.
Some front derailleurs have two holes to prevent this problem, Shimano does not. But your frame was built with 52t or greater chainrings in mind.

If the bracket is beefy enough, you can lower the bolt slot with a file.
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