Originally Posted by
tds101
Since your bike is a 7 speed it's a freewheel, NOT a cassette. Get a rear wheel that has a cassette.
like I said, I got a new old set (excess stock, un sold item) of dahon comp with cassette for 8to10...
i might go for a std 11to25 road bike cassette and swap the chainring from 53 to 56... but, if I do so, do I keep the 39 - 17T jump when recommended max is 16- or do I fit the 44 - 12T jump ?
i don’t use 39 much on the helios whereas it was a requirement on the jetstream when off road.