On Tuesday, January 15, 2013 9:18:52 AM UTC-8, Steve Palincsar wrote: > > On Tue, 2013-01-15 at 09:08 -0800, Jan Heine wrote: > > > > That explains why in our experience, performance correlates only very > > weakly with weight, but very strongly with optimized frame flex > > characteristics. > > For a mind-blowing example of the above, be sure to read the road test > of the titanium road bikes in the current issue of BQ. (I'm going to > leave the big reveal to Jan, if he wants to pick up on the cue...) > > > (Of course, weight and optimized frame flex characteristics are > > correlated on most bikes, hence lightweight bikes often perform better > > than heavier ones.) > > But http://www.youtube.com/watch?v=i0vEgU88IQQ > > > The builder of the bike that was consistently ridden faster in the test, > states that the reason being it is "stiffer in the bottom bracket area". I > would have expected the other bike to be the faster based upon previous > tests that Jan has done for BQ. The builder goes on to point out that his > bike is the less comfortable of the two bikes being compared, also because > of this stiffness. The results just seem counter to the concept of > "planing". I prefer to ride a more flexible frame, but not for the reason > of pace. Maybe Jan would like to expand more on this? >
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