Originally Posted by
queerpunk
i've seen a handful of keirin frames with supersteep seattubes - i think shants mentioned that the st on his makino was 78 or 79 degrees. but those are anomalies. i don't know why such a near-vert st would be beneficial to somebody - i can't really figure out the body type that that would be good for. but i suppose it exists.
not sure whether I read this here or in Japanese on Mixi, but someone said that the keirin frames with ultra steep seat tubes were the product of a fad spawned by a successful racer who had a frame made super steep......and then everyone else who copied him for a while.