Di2

Anybody try using 54x39 7900 chain rings with di2?

No, but I went to 55x42 on my 2011 Felt DA. Shifts perfectly, if that helps you at all.

Shouldn’t be an issue at all.

Bob

No, but I went to 55x42 on my 2011 Felt DA. Shifts perfectly, if that helps you at all.

X2. Same set up AND bike AND absence of problems:)

Anybody try using 54x39 7900 chain rings with di2?

I have SRAM 54/39 with Di2. It works fine.