"Stefan Pavlik" <[email hidden]> wrote in message news:<[email hidden]>...
Quoted message said:I have older 7spd road bike. It has a Shimano RSX rear
cassette/hub. I was looking on Ebay and have have seen
some HED disc wheels and even some 7 spd tubular rear
wheels that use freewheel not cassette. My question is are
they compatible? I would like to experiment with tubular
wheels and solid discs on my older bike (usually cheaper)
before I make the plunge investing $1000+ for my good
bike. I know the spacing is 126mm but like I said, just
don't know compatibility of freewheel-vs-cassette.
Any info or places I can find this out would be of
great help
Thanks in advance, Steve
I think you are asking whether a wheel with freewheel can be
used to replace one with cassette/freehub. If so the answer
is yes. The method of holding the sprockets in place is
immaterial as far as the chain is concerned. They end up in
the same place, more or less, so there is no problem with
replacing your current wheel/cassette with a new
wheel/freewheel provided the OLN dimension is the same.
If old and new parts are Shimano 7-speed then there should
be no indexing problems (I assume indexed shifters on most
7-speeds) as Shimano cassette and freewheels have the same
spacing between sprockets (see sheldonbrown.comgloss spOpen ↗
ss.html for details). If mixing makes of lever and freewheel
then you need to check the sprocket spacing carefully.
Of course, technically a freehub design is better, but
freewheel equipment is, as you observe, readily and cheaply
available, being just about as unfashionable as you can get
these days (down-tube friction levers excepted). Having
said that I have bikes with many 1000's of miles on
freewheels with no problems (except removing those damned
Suntour 2-peg ones).
Andrew Webster