SS or GS for 50/34 with 11-28 cassette
I have a compact 50/34 6800 chainset with a 11-25 6800 cassette.
I want a new cassette to offer a bit more gearing for a few tough sportives coming up. Buying a 5800 cassette to keep costs down as only required for occasional use.
Simple question is, will the 6800 SS rear derailleur accomodate an 11-28 cassette on a 50/34 compact - giving a total of 33T capacity, or will i need to buy an additional GS derailleur.