Joined: Nov 2007
Posts: 620
Likes: 7
From: Anchorage, Ak
Bikes: 2015 Calfee Tetra tandem,2016 Calfee Tetra Adventure Tandem, Ventana ECDM 26 mtn tandem, Ventana ECDM 29r full suspension Mtn tandem ,Ventana Fat tire tandem, Calfee Dragon Fly, Santa Cruz Carbon 5010, 907 Whiteout fat tire
So a couple DI2 possibilities that may not be available for Etap. Hydraulic brakes and even greater gear range with some simple mods.