Originally Posted by
rydabent
Bikes have gotten so light and fragile that the UCI has set a low limit..
I'm not seeing evidence that lightweight bikes are "fragile".
On the contrary, modern carbon parts and frames are often stronger and stiffer than the heavier stuff they replace.
The UCI weight limit of 6.9 kg was established in 2000 to prevent "stupid light" bikes and ensure that competitors raced on similar bikes.
Technology has improved greatly since 2000, and now a strong and sturdy bike can be built that's well below the UCI limit.