Originally posted by shokhead
Pivots in 105 derailleurs and to a lesser extent,ultegra,will wear out faster then dura-ace,record or chorus and thus produce sloppier shifting.D/A and record rear derailleurs have ball bearings in the jockey wheels that greatly cut friction relative to the bushings found in less expensive jockey wheels.If you dont go carbon,shimano D/A cranks are lighter and as stiff as campy aluminum.105 group is outstanding when new.Braking and shifting will be weak for a big guy and performance will deteriorate quickly.Heavier riders should consider higher end parts.VeloNews buyer's guide.
Could you post a link to that article? I have 105 and am a bigger rider(180lbs). I have about 700 miles on my Felt F65 and have had no problems. The braking seems to be great to me. How many miles does it take to see a loss in performance. I was told the 105 would last, thats why I bought it.