Actually, the chainstays aren't any shorter, there wouldn't be enough room for the wheel. But the overall wheel base is tighter. There are also two different curved sprint frames. The 75 is one inch shorter across the top tube than the 74 and the ride is noticeably different. For my height, the 75 feels more "in the pocket" but it's also a bit wilder ride.

They show up on ebay every once in a while (I've bought two of them), but the really rare bike is the curved tube Paramount. I've only seen one on ebay in the past few years and unfortunately it was not my size. If anyone sees a 22" curved Paramount frame for sale, give me a hollar.

Also looking for a 75 chestnut Sprint (the brownish burgundy color).