4
votes
3answers
268 views

Down tube and seat stay

I've noticed that in a lot of bikes (though certainly not all), the seat stay and the down tube are parallel or nearly so. Is there any structural reason why a manufacturer might make that choice or ...
1
vote
2answers
407 views

top tube angle on steel and carbon road bikes

You generally see the top tube on steel bikes being parallel to the ground, whereas on a lot of carbon bikes it's angled. Why is that? (my observations are obviously limited, but it seems like a ...
13
votes
5answers
953 views

Why is it common for cheap bikes to have the frame sawn in half below the saddle?

These days cheap bikes often seem to come with the frame sawn in half below the saddle. What does the manufacturer gain from this design, and why is it associated mostly with cheap, low quality ...
1
vote
2answers
795 views

FEM: How to Design weight-distribution in bike prototypes?

Inferio! No-one can understand this bloated question here, now more focussed. Suppose you are doing a new bike. How can you be certain that some critical point won't get too much force and the right ...