Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

How to know Part compatibility on a vintage bike?

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.

How to know Part compatibility on a vintage bike?

Old 09-27-18, 06:28 PM
  #1  
Pj0915
Newbie
Thread Starter
 
Join Date: Sep 2018
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
How to know Part compatibility on a vintage bike?

Hey guys,
The bike I have right now is a 1984 Bianchi alloro. It has what seems to be all the original parts, Campy derailleurs and shifters, as well as what looks like a sakae chain ring (im not sure though). I have been wanting to convert this bike into a single speed, but I don't know what type of crank set to get, what type of bottom bracket, or what type of cog will fit onto the rear wheel. Can someone please tell me how to know what parts will be compatible with this bike? Or how I can find out? Thanks.
Pj0915 is offline  
Old 09-27-18, 07:04 PM
  #2  
dedhed
SE Wis
 
dedhed's Avatar
 
Join Date: Apr 2005
Location: Milwaukee, WI
Posts: 5,028

Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400

Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 666 Post(s)
Liked 47 Times in 40 Posts
Research?

Find out what it is you have now first.

Bianchi bicycle catalog 80s -
dedhed is offline  
Old 09-27-18, 07:24 PM
  #3  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 11,656

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1732 Post(s)
Liked 45 Times in 32 Posts
Your frame might have Itl. or British BB threading. But undoubtedly the Bb was a tapered square design. Your frame likely has a 126 wide rear drop out spacing, wider then the then standard for a track hub/cog but now fairly common. Your current crank arm might use a 130 or 135 or 110 chainring bolt pattern, all still available now.

So compatibility is across the board. As dedhed says do your homework on what you currently have Decide what gearing and whether you want it to be a fixed or a coasting system. Find out whether the rear hub will easily fit a single cog. From all this you will begin to home in on what the crank/ring set up needs to be.


Shops do this sort of stuff often and understand all the small aspects that make a conversion work well or sort of work. BTW do you have vertical drop outs or horizontal ones? Chain tensioning will depend on this. Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  
Old 09-27-18, 08:34 PM
  #4  
Pj0915
Newbie
Thread Starter
 
Join Date: Sep 2018
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thank you, will check everything out. Ive been trying to upload pictures but it wont let me until I make more posts. Although, can I just get any spacers for the rear hub and cog? I figured I would have to put spacers to make the chain aligned.
Pj0915 is offline  
Old 09-27-18, 08:40 PM
  #5  
Pj0915
Newbie
Thread Starter
 
Join Date: Sep 2018
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Pretty sure its the 84 nuovo racing model
Pj0915 is offline  
Old 09-27-18, 08:43 PM
  #6  
Pj0915
Newbie
Thread Starter
 
Join Date: Sep 2018
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
It has horizontal dropouts btw, almost like a 30 degree angle facing the rear.
Pj0915 is offline  
Old 09-27-18, 10:00 PM
  #7  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 11,656

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1732 Post(s)
Liked 45 Times in 32 Posts
Re chain tensioning- As long as you have at least 1/2" of drop out slot AFTER a cog/ring combo is chosen you won't nerd a spring loaded tensioner (unless a half link is used). With said tensioner don't try a fixed cog. Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  
Old 09-30-18, 05:42 AM
  #8  
duffer1960
Senior Member
 
Join Date: Jul 2006
Location: Milwaukee
Posts: 528

Bikes: Fred cycles

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Liked 0 Times in 0 Posts
I have an inexpensive caliper & find it invaluable. One like the 'economy vernier caliper' in a subcategory here: https://www.mcmaster.com/calipers

I have an old Trek, and I've noticed the taper on the crank has a crack. I too want to be schooled on 'chain line' & how to select a replacement crankset and BB if necessary. (The original spindle races are in good shape, so I'd rather not replace that if I don't have to.)
duffer1960 is offline  
Old 10-01-18, 07:25 AM
  #9  
JohnDThompson 
Old fart
 
JohnDThompson's Avatar
 
Join Date: Nov 2004
Location: Appleton WI
Posts: 20,426

Bikes: Several, mostly not name brands.

Mentioned: 109 Post(s)
Tagged: 0 Thread(s)
Quoted: 1695 Post(s)
Liked 61 Times in 41 Posts
Originally Posted by Pj0915 View Post
The bike I have right now is a 1984 Bianchi alloro. It has what seems to be all the original parts, Campy derailleurs and shifters, as well as what looks like a sakae chain ring (im not sure though). I have been wanting to convert this bike into a single speed, but I don't know what type of crank set to get, what type of bottom bracket, or what type of cog will fit onto the rear wheel. Can someone please tell me how to know what parts will be compatible with this bike? Or how I can find out? Thanks.
Chances are you can use your current crank and bottom bracket. Running a single ring on the inner plateau of a double crank often gives an acceptable chainline. Pick up some single-ring chainring bolts for BMX use to attach the ring to the arm. A BMX single cog freewheel should mount on your current rear hub.
JohnDThompson is offline  
Old 10-01-18, 08:25 AM
  #10  
3alarmer
******
 
3alarmer's Avatar
 
Join Date: Nov 2010
Location: The Big Tomato
Posts: 17,275

Bikes: old ones

Mentioned: 226 Post(s)
Tagged: 0 Thread(s)
Quoted: 14539 Post(s)
Liked 71 Times in 61 Posts
^^^^what he said. There are very few instances where you can't adapt a square taper double crank to single ring, fixed gear use.
You might need to experiment a little for correct chainline and the number of sprocket teeth front and rear, but you have to do that anyway if you buy a new crank.

3alarmer is offline  
Old 10-03-18, 08:45 AM
  #11  
carlosponti
Senior Member
 
Join Date: Sep 2007
Location: Moore, OK
Posts: 109

Bikes: '90 Raleigh Technium Prestige, '90 Fuji Thrill - Gone, '18 Fuji Nevada 1.7 29er

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Liked 1 Time in 1 Post
sheldon bown is a good resource for antique bikes. A few other places around for resources.
carlosponti is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
MWPdx
Bicycle Mechanics
5
10-05-12 05:46 PM
jbkirby
Bicycle Mechanics
5
07-15-11 12:39 PM
doppiodan
Bicycle Mechanics
9
11-03-09 07:25 PM
angelo
Classic & Vintage
5
08-01-08 10:23 PM
Bklyn
Bicycle Mechanics
20
05-28-07 03:12 PM

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.