Why 3 x 7 to 1 x 7/8/9/etc? Why not 3 x 7 to 3 x 1?
In mountain biking, the 1 x 8/9/etc is becoming more popular. I am wondering why I haven't heard of anyone going to 3 x 1 (3 speed in front, one in rear). Can this be done? When I go biking with my kids, I usually don't touch the rear gear, I just change the front one. This avoids me having to keep on shifting.