Originally Posted by
operator
It does make a difference.
The effective length of the housing changes if you are using spiral wound as you turn the bars. When did shimano introduce SIS housing? 8 speed? Earlier? I highly doubt you can get away with using 4mm, brake housing as a substitute for 9+ gear systems.
Good winter experiment.
I got one of the first Dura-Ace SIS drive trains (6-speed, downtube levers) in North America during the winter of 1985 as a pre-production sample for Trek to evaluate. I remember looking at the derailleur housing and thinking "WTF is up with that?" because it had longitudinal strands rather than spiral wound. Then I read the directions...
