do you have 6spd index now? if so you need a 6spd freewheel however I think you can use Shimano Sachs (Aris) and Sunrace
if a 14/28 will work for you, here is one for $21
http://www.loosescrews.com/index.cgi...id=61098162185
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk