I have a beautiful, 15-year-old, custom Reynolds 531 frame
that's still equipped with its original 7-speed, downtube-
shifter 105 gruppo. Every spring, I go through the internal
debate of whether to upgrade the drivetrain to include an
STI-type system, and every year in the past, I've just stuck
with the status quo. This year, however, I'm riding with a
group of guys from work at lunch, and I'm noticing that they
do a more shifting than I do, seem to settle into cadences
quicker, and generally respond better to changes in our
paceline. I think it's time to take the pluge, but I'm still
confused about how exactly to accomplish the conversion.
I figure that I have several options, all with their own
advantages and disadvantages. I *think* that I've pretty
much scoured this group and the other discussion areas, but
I still can't infer the "best" approach. At this point, I'm
not ready to retire the frame and start over with a new
bike. I'll present what I think the options are, in order
from lowest to highst cost, and perhaps one of the experts
here can advise, I could:
1. Do nothing, and stay in complete retro-grouch mode with
the downtube shifters. I'm turning 40 this year, and it's
not like I'm getting faster and *need* a speed advantage.
Pros: Cheap! I've hoarded enough 7-speed cassettes to make
this work for 10 more years. Utterly reliable.
Cons: I'm starting to look like the group dunce in these
rides, and at least a small part of it is the time it takes
me to respond to changing road conditions.
2. Track down a set of used RSX or Sora brifters (~$100 on
eBay?), and install those.
Pros: Relatively cheap. Stays in the Shimano "family," so
everything should work together well.
Cons: They don't seem to be too durable. Lots of complaints
in the on-line groups about ratchet mechanisms breaking
down. No warranty. It looks like there's limited ability to
trim the front derailleur (which I have to do now--don't
know if this is intrinsic to the old 105's, or if it's a
bad install).
3. Buy and install the Modolo Morphos ($180 at Performance).
Pros: The ergonomics look good. Only slightly more
expensive. Full warranty. Adaptable to 9-speed later if I
decide to go that way. Reviews say that ability to trim that
finicky front derailleur is excellent.
Cons: Lots of compliaints about installs, sensitivity to
tiny misalignments, and Modolo non-response to problems.
None of my LBS's has ever dealt with these.
4. Buy a recent vintage 9-speed 105 system, and just install
8 cogs (per advice of Sheldon Brown at Harris web site).
$230 at Performance gets the dreailleur, shifters, cogs
and chain. Will also need to buy compatible chainring.
Pros: Great long-term parts availability. Is chainring
spacing on 9-speeds tighter, so there'd be less
trimming required?
Cons: Starting to get expensive, with a slippery slope. Will
this require a new front derailleur as well? As long as I'm
looking at chainrings, I might as well get a whole crankset
and bottom bracket, too. And so on.
5. Cold-set the stays to 130 mm, and go 9-speed whole hog.
Pros: Just like having a new bike.
Cons: Costs even more. New wheels. Brakes? Better to try
option 4 first, and go there in stages if desired?
6. 9-speed the "right way." Go back to my framebuilder, and
have him re-weld the stays to 130 ($500 including new
paint job and decals).
Pros: ?
Cons: Full conversion would cost as much as a new bike.
7. Others that i haven't mentioned? I did see one post
saying that the Campy Ergo 8-speed system has the same
center-to-center cog spacing as Shimano's 105, and that
this works well, but even the used shifters are pretty
expensive. I haven't seriously considered it, but I'm
willing to try.
As you can see, I'm in a massive dilemma here. Please help!!
Curt