My bike is sporting a 5700 groupset, and I'm kinda cheap and reluctant to dig into Ultegra or Dura Ace for upgrade, but I know the key parts are probably STI's and rear derailleur, regarding weight.
I came across this thing:http://www.ebay.com/itm/Shimano-105-570 ... 564b0d6961
So I'm thinking of buying this set, can anybody comment on it? Is it worth it?
Actually I don't really care about the FD, since weight saving is not something to write home about, but it's there, so why not?
I weighted my RD=224g, FD=92.
Tuning kit is 69$, an Ultegra 6700 RD is 62Euros + shipping 10E (total of 95$).
6700 RD is 30g lighter than 5700.
Anybody used this Far Near tuning kit? I know bolts shave off some grams, but the pulleys are probably the ones that make the most difference.
Also, gold stuff would like purty on my black 5700 group.
On the other hand 5700 STI's are 493g, which is brick heavy, even my 1st generation 8 speed Veloce ergopower from 1994. weighted only 448g.
6700 STI's aren't much lighter, but 7900 are. Price of 7900 STI's is high, so that is not an option, and 6700 STI's don't bring any weight advantage.
But, I noticed it is possible to buy replacement STI band clamps, 7900 series, titanium ones, so I'm thinking on pulling a trigger on those, since that's the only sensible part of STI's that could be changed.
Anybody care to comment on "regular" band clamps (5700 and 6700 have the same one) and 7900 which is TI, and probably lighter. I haven't found any numbers on those, but I imagine they could shave 20 to 30g off of pair of 5700 STI's, maybe more?
I know my wheels are probably the biggest boat anchor, but I'll get to those later.
ps: This is the bicycle:
It's not exactly WW material, but it's not far off, regarding it's age.
Frame+headset+fork=2599g, Columbus EL-OS
There are some interesting bits here and there, which I got either for cheap (new), or used (older stuff).
40cm Bontrager SSR VR-C compact handlebars 26.0mm = 289g
Dura Ace pedals (7850) = 274g (got this heavily used ones for 50$, they'll serve me long time
Madison Prime saddle = 219g (if I recollect, bought brand new from ebay UK BIN price was something like 48$ shipping included)
Dura Ace aero seatpost = 263g (early 90s seatpost probably)
3ttt quil stem, unknown model = 251g (really hard to find classic stems this light, it's not Ti)
Wheels are 2000g pair, will opt for something far lighter soon, tires are also heavy Vittoria Rubino's 700x25.
Bicycle weight is 9600g.
Hope to bring it under 9000g, which won't be a problem with 1500g wheels and Conti GP4000's.
So I'm looking at options to bring weight further down, here and there, I know some components limit me, like quill stem, but on the other hand, even those I have are considered light for it's time period
This I look to upgrade:
Tuning FD and RD
1500g wheelset with Conti GP4000 and 50g tubes
Hope to hit 8500 with this upgrades
This is the full sheet, yellow stuff is the one I'd like to upgrade, though 7900 brakes would be awesome but they cost too much, and I don't want to compromise satisfying performance of 5700 brakes by buying Planet X superlight brakes...https://docs.google.com/spreadsheets/d/ ... 3c/pubhtml
A friend of mine started TIG welding frames, so maybe in the future I'll opt for a Columbus Spirit frame and fork, which would probably be much lighter than this frame, so I might transfer some components to that frame, so I don't think these upgrades are futile