I am a weak rider and pretty much never use the large ring. I stay in the 38 tooth ring and normally don't go past the 5 th gear in the rear on a 8 speed bike. I am thinking about getting rid of the front derailer because I have to trim it when I go into the 5th gear on the back (did I mention that I might be lazy). If I get rid of the derailer will the chain start to rub on the large ring when I go to the 8th gear? If so can I remove the large ring and just have the 38 tooth ring which would make the bike a true 8 speed.
I am currently doing hill repeats and have not shifted from the 38/28 combo for about a month now. I need to go to an even lower gear because my cadence on a 5% grade in only about 50 rpm. Up the hill at 5 mph and down at 30 mph while coasting and no I don't want to go any faster down the hill.
Am I missing something or can I just ditch the big ring and its associated parts?