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  • Thank you. Interesting guy this Dave Moulton. The history bits of his articles are very interesting. I'll definitely read more from him.
    To make the HT slacker I have to lower the BB. As far as I know the upper limit for bb height (drop) is around 290mm (44mm)

    no you dont you just alter the head tube and downtube lengths to suit ,you dont need a 44mm drop on a street bike anyhow.People ride 172.5 cranks in crits with a normal bb drop and dont have any problems with pedals hitting the tarmac.Unless its for a steep banked track I cant see why you need anything than a normal bb drop

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