"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 http://www.sheldonbrown.com/gloss_sp-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