Originally Posted by
Duane Behrens
...
4. The reason for the difference in cost between the two bikes can be found in the technology and labor required to (a) reduce weight while (b) improving performance.
Ultegra gruppos, a 2.2 lb. frame, quick release brakes, ultra-light wheels and tires, low-friction hell-for-strong bottom brackets . . . all of these things combine for a machine that catapults you up the hill when the pedals are engaged, and yet provides an almost surreal envelope of silence while at speed on the flats. It's a combination of better performance through engineering, all with a constant and singular goal; less weight.
It's not cheap. And you get what you pay for. Best. DB
I have to say, I think ILTB is closer to the mark here. In particular, your
#4 above is particularly suspect. The reason for higher prices of the bikes to which you refer is primarily that the market will bear it. Performance especially is not particularly improved for Ultegra over 105. Yes there are exotic materials and development costs, but only because enthusiasts will pay for the unmeasurable performance gains (if they exist). And for lower weight.
Regarding the weight. There is no bike that will catapult you up a hill, relatively speaking or otherwise. One or even two pounds off the frame might get you up the hill one percent faster (mgh/t, 178/180 ratio of weight).
Performance: 105 can run silently and shift almost perfectly. Tiagra can, Sora level components can be adjusted for silent operation and smooth shifts. Heck I've even had Shimano 2200 shifting perfectly with a silent drive train.
It's better stuff, no doubt about it. But it is
not a case of "you get what you pay for."