Hello everyone, im new to the forum and also to the bicycle mechanics world .
I have a road bicycle, with 21 speed, (3 front 7 back) , but lately i was thinking to convert it to a 3 speed, which means 1 on the rear and 3 on the front, because i never really use the 7 on the rear wheel.
So what i wanted to do is to put a single speed wheel , leave the Rear Derailleur (adjusted in the correct position) getting rid of the cable and the shifter, and leave the front one as it is.
Does anyone have any experience/advices on doing this? will it work fine?
Forgot to mention is a 9 speed shimano derailleur, was thinking that if this may work i could buy a compact one or something that could take less space ..

thanks

-M