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Old 07-29-10 | 10:48 AM
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Stickney
Longing for a Tail Wind
 
Joined: Jun 2005
Posts: 463
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From: I wish I were in South Dakota
Frame Size and Tube Angles

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
Head Tube Angle = 73

Frame 2:
Top Tube = 59 cm
Seat Tube Angle = 73
Head Tube Angle = 73.5

Frame 3:
Top Tube = 58 cm
Seat Tube Angle = 72.5
Head Tube Angle = 72
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