# Framebuilders - Frame Size and Tube Angles

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View Full Version : Frame Size and Tube Angles

Stickney
07-29-10, 11:48 AM
I am not a frame builder, but realized that perhaps this was a better forum than the road bike area to pose this question.

I have a question on comparing different frames' geometry -- would appreciate some guidance.

I have a bit of confusion in how to analyze top tube length in relation to seat tube and head tube angles. Here are three frames, what differences in fit would I need to take into consideration for each frame? Any guidance/explanation on how to analyze these variable would be really appreciated. Thanks!

Frame 1:
Top Tube = 59 cm
Seat Tube Angle = 72.5

Frame 2:
Top Tube = 59 cm
Seat Tube Angle = 73

Frame 3:
Top Tube = 58 cm
Seat Tube Angle = 72.5