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mmccarthy

how do you measure an actual sloping top tube length on a frame in a cad program using the other usual measurements, such as slope angle............... ?

if no such formula exists what measurements would a frame builder need to know to cut the tube to the right size while building a frame?

if you have the ETT it's pretty straightforward. If not, what measurements do you have?

Sloping top tube distance = ETT/cos(slope angle)

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