Originally Posted by
bonsai171
I didn't know about that, thanks for the clarification. Looks like I reached the same conclusion my own way, didn't know if the logic held.
So would this mean the rear wheel would be in the same position in the rear dropout as my current gearing?
Dave
yes, since the the distance between the sprockets is unchanged, and chain used to wrap the outer halves is likewise unchanged, the total length needed is the same.
BUT the sprockets aren't the same size, so the upper and lower loops aren't parallel. As the sprockets change the taper angle changes so the actual distance also changes slightly. If all is right otherwise, that small difference can be accommodated within the range of slack that SS systems have anyway.