I just purchased (and probably embarrassingly overpaid for) a Nishiki Superbe on ebay which looks to be in very nice shape. It's said to be a 1978, but has a supposedly original Cyclone GT rear der, and a Superbe front. Could the rear der be original? As the Superbe line came out in 1977, I'd have thought both front and rear would be on this bike. I guess I'll look at the various component date codes when I get it, to understand more. I've only found a little info on this model in this forum, and would appreciate any comments on it that other members might have.