Don Gillies wrote "Good-quality 13-28 freewheels are available in 7-speed ratios (SunRace and IRD). " A quick note about them. I have found that they are a little rough and noisy for the first 35 miles or so. Then they seem to have the rough edges worn off and have served me quite well. I was sure disconcerted the first time I ever set out with a new one, though. They seem an excellent buy.
Tom Sanders
Lansing, MI USA