Originally Posted by
bboy314
These will be indexed front and rear. The front may not work well, mixing mtb shifter and road derailleur. If the derailleur is appropriate for your chainring setup, you may want to source a flat bar road front shifter such as the R3500. Or if you do want friction front shifting, use a grip or thumb shifter. Rear should be fine as-is.
bboy314 is correct. Road front derailers don't play nice with mountain bike shifters for 9 speed and below. Mountain bike front derailers don't play nice with road shifters for the same components as well. The rear derailer will work just fine with either in 9 speed or below. Get a mountain front derailer if you are going to use mountain bike shifters. I would suggest something lower on the Shimano line because their higher end front derailers tend to be finicky for set up.