I currently run just one freewheel - a Shimano 14-28 6sp that cost less than $15 new. I'd tried the SunRace chrome version in 6sp but it made clunking noises while pedaling; tried to "break it in" but gave up. The Shimano is not pretty but works fine. Funny how I can go from my 14-28 6sp bike to my only 10sp and the main difference is that I shift more on the 10sp!