Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Using 9-speed sprockets for an 8-speed cassette

Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Using 9-speed sprockets for an 8-speed cassette

Old 03-11-11, 08:44 PM
  #1  
Senior Member
Thread Starter
 
RoboIsGod's Avatar
 
Join Date: Apr 2009
Location: Boston
Posts: 775

Bikes: 2020 Fuji Transonic; Zunow Z-1; All-City Macho King ACE; De Bernardi Track

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 10 Times in 1 Post
Using 9-speed sprockets for an 8-speed cassette

Is it possible to use 9 speed sprockets with 8-speed size spacers to create an 8-speed cassette? If I'm not mistaken, 9-speed sprockets are a bit narrower than 8 speed - will this matter? I thought it was only the space in between the sprockets that really effected shifting.

Thanks!
RoboIsGod is offline  
Old 03-11-11, 08:53 PM
  #2  
Bike Junkie
 
roccobike's Avatar
 
Join Date: Jun 2005
Location: South of Raleigh, North of New Hill, East of Harris Lake, NC
Posts: 9,622

Bikes: Specialized Tarmac, Specialized Roubaix, Giant OCR-C, Specialized Stumpjumper FSR, Stumpjumper Comp, 88 & 92Nishiki Ariel, 87 Centurion Ironman, 92 Paramount, 84 Nishiki Medalist

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 68 Post(s)
Likes: 0
Liked 37 Times in 27 Posts
I've never tried it, but I would suspect it would affect shifting. If I was going to do it, I would be sure to add a spacer or two as needed to assure the cassette is tight on the hub (been there, done that with a cassette not tightened enough). Also, I would tune the rear derailer from the MIDDLE of the cassette, not first gear as is normal for tuning Shimano derailers. This would limit the affect of the gear thickness. I'm assuming you are using 8 speed spacers.
__________________
Roccobike BF Official Thread Terminator
roccobike is offline  
Old 03-12-11, 07:05 AM
  #3  
Banned.
 
Join Date: Dec 2007
Posts: 27,297
Mentioned: 34 Post(s)
Tagged: 1 Thread(s)
Quoted: 378 Post(s)
Liked 1,407 Times in 908 Posts
I don't know how much narrower the actual cogs are.
On the outside, not sure if you can substitute 9sp there due to the built-in spacers.
What size cogs do you need, or are you just tring to lighten things up?
RobbieTunes is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
LeicaLad
Bicycle Mechanics
13
08-30-19 04:40 PM
Spoonrobot
Bicycle Mechanics
10
03-21-17 11:39 AM
due ruote
Bicycle Mechanics
5
02-10-17 09:47 AM
ddscyclist
Bicycle Mechanics
11
01-18-13 08:32 AM
stevage
Bicycle Mechanics
13
12-06-11 08:01 AM

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

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

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.