So when you dimension a frame you need 2 basic things:Stolensteel wrote:Pros are riding with 7075 bars since years, every hi-quality stem is made of 7075. The notorious ultra-thin tubes of CAAD do not turn it into a noodle, it´s just a matter of design... I don´t see why this should be a problem. Take the same design of Caad12 and make it out of 7075, my guess it would weight around 900g, the material would be stronger (less possibility of failure?*), the welds would be way stronger, potentially at about the same price.
Would you buy it? I would. Like tomorrow.
*I´m not an expert, it´s a serious question.
- solid enough not to break
- desired level of stiffness
7075 is stronger than most other aluminium alloys meaning you can use thinner walls —> less material for the same strength = lighter
7075 is as stiff as other alloys (it is a property independant of strength), then if you used thinner wall (since the high strength allow you to) you necessarily end up with flexure frame. If you want the same stiffness... then you need the same amount of material than more classical alloys.
Cannondale example is a good one, 6061 alloy they historically used, is far from being the strongest, but since they designed their frames for a specific stiffness, it largely exceeded the strength needed... using a stronger alloy would just make it... stronger, not stiffer.
Now where would it bring value? In pieces where sufficient strength is more difficult to achieve than stiffness, a stem is an example.
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