Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-08-04, 03:25 AM   #1
bmw_maniac
Senior Member
Thread Starter
 
Join Date: Mar 2003
Location: Auckland, New Zealand
Bikes:
Posts: 144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
How many gears can I put on this bike?

Hello,

I have an old steel frame (ok, it's not that old). It is a 1992 Avanti Ultra, 6 speed downtube shifters, double chainring (got an icky biopace ring thing).

I absolutely love the bike, but the rear wheel is in such a bad state that it is dangerous to ride, so it's sat in the garage for over a year now. If I was to get a wheel for it, how many gears can the bike take? I understand that the older frames with less gears had a narrower gap between the drop-outs.

As for shifting, will it make a difference? I will use the friction rather than the index shifting. It has Shimano 105 groupset with downtube shifters, but not sure of the age of the grouppo.

Any help would be great.

Thanks.

Sam.
bmw_maniac is offline   Reply With Quote
Old 09-08-04, 04:08 AM   #2
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Catrike 559, Merin Bear Valley (beater bike).
Posts: 26,614
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 88 Post(s)
Well, it really comes down to how much you are willing to mess with it to make everything work. The quick, dirty way would be to get new wheel with another 6-speed freewheel and be done with it. If you want to spend the money and do a little more work, you could spread the stays and replace everything but the front wheel and the brakes and go for 9 or 10 speeds. Course, since you say that you absolutely love the bike the way that it is, why would you want to go changing all of that?
Retro Grouch is offline   Reply With Quote
Old 09-08-04, 07:26 AM   #3
Applehead57
slower than you
 
Applehead57's Avatar
 
Join Date: Mar 2004
Location: dairy country NY
Bikes: Gunnar Road Sport, peugeot UO-10
Posts: 652
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
RetroGrouch has the answer. Yes you can, but how much $ would you spend to make it happen? A new(er) bike is usually the smarter choice. If you replace much of your old bike's componentry, the cost climbs fast.

By the way, I still have hopes to bring my 1977 Peugeot up to todays specs. I love the ride, but adding up all the pieces necessary would buy another good used bike.
Applehead57 is offline   Reply With Quote
Old 09-08-04, 08:29 AM   #4
BlastRadius
Direct Hit Not Required
 
BlastRadius's Avatar
 
Join Date: Nov 2003
Location: San Bruno, CA
Bikes: Leopard DC1, Ridley X-Fire, GT Zaskar 9r
Posts: 6,190
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If the dropouts are 126mm, just spreading the dropouts will cause the dropout faces to be too much out of parallel and put additional bending forces on the axle. If you have a good LBS or frame builder nearby, they can cold set (i.e. bend) the stays to 130mm and make sure the dropouts are parallel and the derailer hanger is aligned. It costs me $30 to have this done at a local framebuilder.
If the dropouts are 128mm, spreading the stays would probably suffice.
BlastRadius is offline   Reply With Quote
Old 09-08-04, 08:31 AM   #5
sydney
Senior Member
 
sydney's Avatar
 
Join Date: Jan 2004
Bikes:
Posts: 9,428
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by BlastRadius
If the dropouts are 126mm, just spreading the dropouts will cause the dropout faces to be too much out of parallel and put additional bending forces on the axle. If you have a good LBS or frame builder nearby, they can cold set (i.e. bend) the stays to 130mm and make sure the dropouts are parallel and the derailer hanger is aligned. It costs me $30 to have this done at a local framebuilder.
If the dropouts are 128mm, spreading the stays would probably suffice.
You only need to worry about that stuff if you are AR.
sydney is offline   Reply With Quote
Old 09-08-04, 08:42 AM   #6
Indolent58
Queen of France
 
Indolent58's Avatar
 
Join Date: Sep 2004
Location: San Diego, CA
Bikes: Look 565, Trek 2120
Posts: 3,799
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
New rear wheel, new 9sp cassette, new 9sp chain and you are done. Your crank and derailleurs are fine if you are sticking with friction shifting. Cold setting of the frame is often not necessary. Usually you can pop the wheel in w/o much effort.
Indolent58 is offline   Reply With Quote
Old 09-08-04, 08:46 AM   #7
John E
feros ferio
 
John E's Avatar
 
Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Bikes: 1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
Posts: 17,046
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
Quote:
Originally Posted by Indolent58
New rear wheel, new 9sp cassette, new 9sp chain and you are done. Your crank and derailleurs are fine if you are sticking with friction shifting. Cold setting of the frame is often not necessary. Usually you can pop the wheel in w/o much effort.
If it were my bike, this would be my course of action. If you can find a new cartridge BB or BB spindle cheaply, you could also consider a triple chainring.
__________________
"Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1981 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
John E is offline   Reply With Quote
Old 09-08-04, 10:39 AM   #8
supcom
You need a new bike
 
supcom's Avatar
 
Join Date: Aug 2002
Bikes:
Posts: 5,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
First of all, what is wrong with the rear wheel? Perhaps you just need a new rim and spokes and do a little hub maintenance and be back in business.
supcom is offline   Reply With Quote
Old 09-08-04, 12:27 PM   #9
elares
Senior Member
 
Join Date: Aug 2003
Location: Los Angeles
Bikes: Rivendell, Trek 7700, Univega Viva Sport, Bike Friday, Bike Friday Tandem, Bike Friday Triple, Trail-A-Bike, Trailer.
Posts: 205
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have a 1985 Univega road frame that started life as a six speed friction shifter. It now runs 9 speed STI. I got tired of muscling the wider hub in and spread the dropouts myself with no tools. As a nine speed, it's seen over 20,000 miles with no trouble. Oh yeah, it used to have 27" wheels and now 700c. Also used to be a double, now a triple. God I love that bike.
elares is offline   Reply With Quote
Old 09-08-04, 05:10 PM   #10
zacster
Senior Member
 
Join Date: Jul 2004
Location: Brooklyn NY
Bikes:
Posts: 4,974
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
I have an '81 steel framed Davidson that I put a new 9sp Ultegra wheel on. I have to spread the dropouts very slightly. I put a 9sp chain on, adjusted my derailleurs, and it works like a charm. It shifts smoothly, quietly, quickly with the old campy down-tube friction shifters. The only problem is the cage hits the spokes on the innermost cog. The clearance on the 9sp is much closer. Other than that, I wouldn't mess with mine any further.
zacster is offline   Reply With Quote
Old 09-09-04, 03:00 AM   #11
bmw_maniac
Senior Member
Thread Starter
 
Join Date: Mar 2003
Location: Auckland, New Zealand
Bikes:
Posts: 144
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by supcom
First of all, what is wrong with the rear wheel? Perhaps you just need a new rim and spokes and do a little hub maintenance and be back in business.
well you see, I am lazy. but actually that may be the best option. What's a good strong rim, that doesn't cost terribly much? (Remember I live in NZ, so I can probably only get the better known brands)

Oh and the old one? It has cracks all over the rim, the spokes are starting to pull out of it as the holes are mis-shpaed and bigger than they should be. I reckon it would explode if I hit a rock.
bmw_maniac is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 08:01 PM.