Originally Posted by
Pukeskywalker
Seems like the worst of both worlds: You still have a RD, but you also have the risks of a failed IGH
Except that the SDD is quite sturdy and not likely to fail. A comparison to multi-speed IGH is apples and orangutans. SDD is its own different thing. My 20" wheel bike has a range of 20-119 gear inches due to the very reliable SDD.