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Rear derailleur/Shifter options for old Bottecchia(8 posts)

Rear derailleur/Shifter options for old BottecchiaMegalast
Dec 15, 2003 9:44 AM
I have an old(er) Columbus steel Bottecchia, (circa '89) which I have been riding as a fixed gear since the rear derailleur broke at the hanger. The downtube shifters also were on their last legs (i.e. pieces literally dropped off during a ride and were unrecovered). This is my second bike, and really only gets ridden on rainy days and on the trainer. However, I would like to replace the derailleur and shifters. The rear wheel currently has a seven speed Shimano HG cassette. I have a Centaur 10 speed derailleur and ergo shifters as spare parts as well as a ten speed cassette on some Protons, but the drop outs on the old Botty aren't wide enough to accept the Proton. My questions are as follows:

What is my best (read most cost-effective over the long term) option to bring this bike up to speed, or otherwise maximize the use of current parts?

1.Should I simply get a cheap(er) Shimano derailleur and down-tube shifters?

a. Will the newer derailleur be compatible with a seven speed cassette?

2. Should I look into bending the drop-outs to accomodate the 10 speed cassette on the Protons?

3. Should I bag it all together and get a new cheap frame to put this Centaur group (I have the full group) on?

a. If so, please let me know of some good places to look for reasonable quality/priced aluminum frames.

4. Other options??

Thanks in advance for any assistance.
Spread it. Maybe a shop can cold-set it. nmSpunout
Dec 15, 2003 10:06 AM
agree spread it here's how-tocyclopathic
Dec 15, 2003 1:48 PM
from Sheldon Guru Brown http://www.sheldonbrown.com/frame-spacing.html
agree spread it here's how-toMegalast
Dec 15, 2003 2:30 PM
thanks Cyclopathic; good info from the Guru. I think I'll give this a try. Certainly saves $ (unless I pull a Bam Bam on the Bottecchia!). I'll update with results.
Before you get too elaborateOldEdScott
Dec 16, 2003 11:02 AM
have you just tried shoving the wheel in there? It may take just a little muscle, but I bet it works, and if so it'll be fine.
be patientcyclopathic
Dec 16, 2003 11:04 AM
I've done it on 4 frames so far, and it is better under do then over do. Do it in small 0.5-1mm increments alternating sides. Also use wheel to check alignment on chain/seat stays good luck.
be patientMegalast
Dec 16, 2003 7:23 PM
Worked great! Took a little doing, but I gradually got it to fit just right. I haven't done the "String test" on the frame, but the wheel sits in (to the eye, anyway) square.

thanks again for the advice.
:o) keep it running nmcyclopathic
Dec 17, 2003 2:47 PM