Originally Posted by
Chris_W
visual feedback reasons
newer Shimano Tiagra STI shifters (ST-4500) have a visual indicator built in to the top of the hood, at front
; work for 3-speed chainrings and 9 speed rear. 2 clicks between chainrings, so a bit of trimming is possible.
2 of my 3 single bikes have Suntour bar-ends, the other has indexed down-tube, 7-speed.