I'm happy to help and hope it works out for you. Keep us posted. Ultimately it is trial and error and what works for one won't necessarily work for everyone. The best advice I can give is to try it. Several guys here are using this setup.

Below is the CS-M8000 11-42 cassette on an Industry Nine Torch road hub with the 1.85 mm spacer. The B screw was reversed.

The biggest concern is crosschaining 46 front and 42 rear. It does stretch the derailleur, yes, but I run it that way on occasion and nothing bad happens. I'll see if I can get a photo of it that way.

Keep in mind that it is Di2 running an RX-805 rear derailleur and firmware prevents using the two smallest sprockets in the rear when on the small ring in the front. There is physically no way to shift into the 30/11 or 30/13 combinations. Those gear combinations are simply locked out by software. A mechanical system could shift into the small/small combinations but I don't know what would happen - maybe the chain would be too loose?

19.5 gear inches is ridiculously low when riding around town unloaded. Strap 30 lb of gear on the bike, head up a 15% grade or do a 2500 ft climb however, and it comes in handy.










-Tim-