RE: 40t 10 speed cassettes
I think there will be plenty of interest. Given the high pricepoint of the xx1 (the "whole system" - I could go on and on here about the "whole system price"), many of us opted for 10 speed/clutched derailleur/raceface ring. I had stellar results with this and wouldn't mind a little bigger cog on the cassette. . .
- Bike Checks