I'm buyiny a road bike.
It will have an Ultegra compact (50/34) fitted. The cassette choice:
My current hybrid is 48/36/26 with a 12/26 cassette fitted.
I'm not sure on what cassette to get, I was thinking 12-27 or 12-25. What do you guys suggest?
I currently cycle 80 miles a week on rolling roads/hills. Will the 12-25 suffice? Fitness is ok (ish) I can cycle 15 miles at a 14.3 mph average - no problems.
I'm planning on increasing my 25 mile runs up to 40 miles - rolling hills.