New_One wrote:
老兄
你硬掰到...(恕刪)
SORRY，new ONE兄，讓你看不懂。
不過，還真的是有澳洲雜誌發測試文(lateral stiffness of crank arm)，更正確的說是( torsional stiffness )，還排了名次...雜誌裡在測試時也說明了測試的理由，但也有人回側向強度真的重要嗎???
"Crank design has been refined to the point that fore and aft movement have been virtually eliminated. Modern designs are more elongated than ever before; this ensures torsional stiffness and results in little loss of power. What affects the transmission of energy from the pedal to the chain is the sway from side to side.
You can actually see a crank with poor lateral rigidity move, even when only a minimal application of force is applied. This is what we wanted to measure because this is what affects your performance."
還有排名喔!
For flex with 40kg:
1 ) Shimano Ultegra 2.08mm
2 ) Time ASX Titan Carbon 2.12mm
3 ) Shimano Dura Ace 2.20mm
4 ) Campy Chorus Carbon CT 2.48mm
5 ) Campy Record Carbon 2.59mm
6 ) Campy Chorus Aluminium 2.62mm
7 ) Campy Centaur Carbon CT 2.76mm
8 ) Campy Record Aluminium 2.78mm
9 ) Campy Centaur Aluminium 2.99mm
10 ) FSA Gossamer Megaexo 3.05mm
11 ) Zipp 300 3.40mm
12 ) FSA SLK Megaexo 3.41mm
13 ) FSA K-Force 3.76mm
我知道你的疑問為何?但我想說的是，事情是有很多面向的。
還有。就是不知道測法為何才問A兄，畢竟我沒看過那篇測試文。
原討論在這裡
http://weightweenies.starbike.com/forum/viewtopic.php?f=3&t=16686&sid=31b10e74a9331d73070550b6376a0a01&start=30
不管是側向還是正向形變，說真的，以我個人感受，還是覺得第一重要的。
nitosuji wrote:
當然是測A力，是說你沒看過有人把DA的腿踩斷過嗎
還有就討論而言，只有越來越細，沒有越來越廣的
廣到最後乾脆一字"爽"就可以做結論了
Arbicool wrote:
如nitosuji ...(恕刪)
您們說的是，小弟並非專業領域中人，還淺得很，謝謝說明。
我想這就是討論，變成爭辯就沒甚麼意義.....。
A大的論點很犀利，受教了。
Top-Secret wrote:
老實說
菜媽的論點...(恕刪)
謝謝你說出我的看法!!!
。科學研究就該像"nitosuji"大講的要越做越細，但身為肉腳的我，這些變數真的真影響我太小了，。真的不回了阿。謝謝大家指教
