Originally Posted by
SirHustlerEsq
I'm a newb but I've noticed significantly better downshifting functionality in Ultegra compared to my 105 stuff, and the same guy adjusted both derailleurs. There is a little more hunting for the gear when downshifting on the 105 stuff than Ultegra and that "hunting" is inconsistent from gear to gear. Basically, you have to increase lever-throw on downshifts for the easier gears. I don't know if that's related to the derailer or the shifter.
It might be the derailleur because I have the new 105 group but I have the Ultegra rear derailleur and I don't get that hunting. HOWEVER, I did test ride a full 105 group with the derailleur and I did not notice that hunting, nor did I notice it in Tiagra. I did notice that the shifts were not quite as fast with the 105 or the Tiagra rear derailleur, but it was only a tad difference. However, the shifters/brake levers felt cheap with the Tiagra vs the 105 but I could barely discern a difference with the Ultegra unlike mag reviews I've read but people who used both say the same thing I have been saying; see:
http://www.beginnertriathlete.com/di...asp?tid=187662 (note; there is a guy there who feels the same about Sora as
hhnngg1 does.)
I think for the cost differences 105 is the sweet spot for Shimano.