Jess is right. If it were a right triangle (seat tube would have to be perpendicular to the ground), then the TT would have to be the longest side of that triangle. With a sloping top tube and an angled seat tube, the seat tube forms the short leg, and the TT the other leg, and provided that the TTT is shorter than the sum of these (it is), your geometry teacher will be happy.
Here's a picture with a sloping top tube.
http://montgomerycyclery.com/product...22-1-22955.htm
Edit: Durr, that's also a right triangle. It's just not the one you were expecting!
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Thread: TTT vs Top Tube length
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01-21-2011, 04:20 PM #3
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Last edited by Owlie; 01-21-2011 at 04:28 PM. Reason: I cannot geometry. I have the dumb.
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