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Top tube length / seat tube angle question

Steve928Steve928 Posts: 314
edited May 2008 in Workshop
Can someone help me out please? - I did languages at school and maths/trigonometry etc. just makes my head hurt.

Assuming no other differences, how much shorter would the horizontal top tube be on a bike with a 76 degree seat tube compared to bike with a 72.5 degree seat tube, at a point 550mm above the BB centre?

(Time trial bike fit question, by the way).


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