Originally Posted by Chris_W

I've currently got the Wolf Road-Link on order, and will be installing it on our tandem with a 6870 Di2 RD with an 11-40 cassette for our trip from the Spanish Pyrenees to the French Massif Centrale next month. I'll post on here as to how successful this combination is. Without the Road-Link, the 6870 easily gets into the 36-tooth cog of the 11-40 cassette.