Originally Posted by
robertj298
My 89 Expert with Suntour GPX components has been very loud shifting since I've gotten, which I read was common.I took the advice of membar Canklecat
and replaced the freewheel with a sunrace R30 and the chain with a KMZ-72 chain and man what a difference. I shift now and about all I hear is the click of the shifters.
Glad to hear it worked as well for your Ironman GPX group as it did for mine.
A couple of weeks ago I switched back to a Suntour freewheel, 13-26, for a little extra help on climbs. It works okay but doesn't shift as smoothly as the SunRace freewheel. I might eventually switch to a 13-28 SunRace MFM30. I have one on the Trek and it works well too.