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

Using 8 Speed Chain With A 10 Speed RD

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 8 Speed Chain With A 10 Speed RD

Old 10-03-19, 05:37 AM
  #1  
verktyg 
verktyg
Thread Starter
 
verktyg's Avatar
 
Join Date: Jul 2006
Location: SF Bay Area
Posts: 3,941

Bikes: Current favorites: 1988 Peugeot Birraritz, 1984 Gitane Super Corsa, 1981 Bianchi Campione Del Mondo, 1992 Paramount OS, 1990 Bianchi Mondiale, 1988 Colnago Technos, 1985 RalieghUSA Team Pro, 1973 Holdsworth

Mentioned: 195 Post(s)
Tagged: 0 Thread(s)
Quoted: 992 Post(s)
Liked 1,041 Times in 579 Posts
Using 8 Speed Chain With A 10 Speed RD

Not C&V but has anyone had experience using an SRAM PC850 6-7-8 speed chain or similar width chain with a new Campy Veloce 10 speed rear derailleur?

Campy Veloce RD11-VLBXS


Reason for this choice is vanity and aesthetics. I like the way this RD looks.

I have 8 speed parts that I'm putting on a new frame that will have all black components.

No need to go Spinal Tap here, 8 speed is just fine.



I'm using SRAM PC8x0 chains with Campy 9 speed derailleurs and Shimano 8 speed cassettes on several bikes without any problems.




My concern is the 10 speed cage may not be wide enough for smooth operation with an 8 speed chain.

Chain widths:

6 speed – 7.8 mm (5/16 in) (all brands)
7 speed – 7.3 mm (9/32 in) (Shimano HG), 7.1 mm (9/32 in) (SRAM, Shimano IG)
8 speed – 7.3 mm (9/32 in) (Shimano HG), 7.1 mm (9/32 in) (SRAM, Shimano IG)
9 speed – 6.6 to 6.8 mm (1/4 to 9/32 in) (all brands)
10 speed - 6.2 mm (1/4 in) (Shimano, Campy), 5.88 mm (7/32 in) (Campy, KMG)

Also I'm curious, it looks like some of these Campy Veloce RD11-VLBXS RDs are made in Romania rather than Italy? Any issues with that?

verktyg
__________________
Don't believe everything you think! History is written by those who weren't there....

Chas. ;-)


Last edited by verktyg; 10-03-19 at 09:11 AM.
verktyg is offline  
Old 10-03-19, 08:51 AM
  #2  
jiangshi
OFG in Exile
 
Join Date: Jul 2013
Posts: 1,834
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 458 Post(s)
Liked 180 Times in 122 Posts
I have had an 8 speed chain rub on the cage of a 10s Campagnolo RD.,
jiangshi is offline  
Old 10-03-19, 09:33 AM
  #3  
verktyg 
verktyg
Thread Starter
 
verktyg's Avatar
 
Join Date: Jul 2006
Location: SF Bay Area
Posts: 3,941

Bikes: Current favorites: 1988 Peugeot Birraritz, 1984 Gitane Super Corsa, 1981 Bianchi Campione Del Mondo, 1992 Paramount OS, 1990 Bianchi Mondiale, 1988 Colnago Technos, 1985 RalieghUSA Team Pro, 1973 Holdsworth

Mentioned: 195 Post(s)
Tagged: 0 Thread(s)
Quoted: 992 Post(s)
Liked 1,041 Times in 579 Posts
Chain Rubbing On Derailleur Cage

Originally Posted by jiangshi View Post
I have had an 8 speed chain rub on the cage of a 10s Campagnolo RD.,
Thanks, that's the kind of info I was looking for.

Campy used both a 6.2mm wide 10 speed chain and a narrower 5.88mm wide 10 speed chain.

Since this is a newer product it probably uses the narrower chain???

verktyg
__________________
Don't believe everything you think! History is written by those who weren't there....

Chas. ;-)

verktyg is offline  
Old 10-03-19, 10:02 AM
  #4  
conspiratemus1
Used to be Conspiratemus
 
Join Date: Jan 2009
Location: Hamilton ON Canada
Posts: 1,504
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 292 Post(s)
Liked 245 Times in 163 Posts
How about a 9-speed chain as a compromise? I know 9-speed runs just fine on 8-speed sprocket spacing. Never tried it in a 10-speed cage.
conspiratemus1 is offline  
Likes For conspiratemus1:
Old 10-03-19, 10:45 AM
  #5  
conspiratemus1
Used to be Conspiratemus
 
Join Date: Jan 2009
Location: Hamilton ON Canada
Posts: 1,504
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 292 Post(s)
Liked 245 Times in 163 Posts
Originally Posted by verktyg View Post
Not C&V but has anyone had experience using an SRAM PC850 6-7-8 speed chain or similar width chain with a new Campy Veloce 10 speed rear derailleur?

Campy Veloce RD11-VLBXS

. . .

Also I'm curious, it looks like some of these Campy Veloce RD11-VLBXS RDs are made in Romania rather than Italy? Any issues with that?

verktyg
I can check for you if a 9-speed chain will go through a 10-speed cage. We switch back and forth between 9- and 10- speed setups on our tandem depending on terrain, haven't mixed them. But I could easily try a 9-speed chain on the 10-speed Campag Racing Triple that's on it right now. Just have to finish mixing up a batch of bread, first.

As for Romania, well I can tell you they produce great opera sopranos and tennis players (although Bianca Andreescu was born in Canada, 6 yr after her parents moved here.)

Last edited by conspiratemus1; 10-03-19 at 10:48 AM.
conspiratemus1 is offline  
Old 10-03-19, 12:58 PM
  #6  
Spaghetti Legs 
Senior Member
 
Join Date: Dec 2014
Location: Central Virginia
Posts: 4,531

Bikes: Numerous

Mentioned: 120 Post(s)
Tagged: 0 Thread(s)
Quoted: 1441 Post(s)
Liked 1,497 Times in 565 Posts
Campy has been making a lot of stuff in Romania for several years now. I wouldn’t worry about that. Back when I had a couple of 9 speed Shimano equipped bikes, I would use 9 speed chains (SRAM I believe) on my Chorus 10 bike without problems.
__________________
N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur

Spaghetti Legs is offline  
Old 10-03-19, 01:27 PM
  #7  
RobbieTunes
Banned.
 
Join Date: Dec 2007
Posts: 27,297
Mentioned: 34 Post(s)
Tagged: 1 Thread(s)
Quoted: 378 Post(s)
Liked 1,386 Times in 895 Posts
Originally Posted by verktyg View Post
Not C&V but has anyone had experience using an SRAM PC850 6-7-8 speed chain or similar width chain with a new Campy Veloce 10 speed rear derailleur?

Campy Veloce RD11-VLBXS


Reason for this choice is vanity and aesthetics. I like the way this RD looks.

I have 8 speed parts that I'm putting on a new frame that will have all black components.

No need to go Spinal Tap here, 8 speed is just fine.



I'm using SRAM PC8x0 chains with Campy 9 speed derailleurs and Shimano 8 speed cassettes on several bikes without any problems.




My concern is the 10 speed cage may not be wide enough for smooth operation with an 8 speed chain.

Chain widths:

6 speed – 7.8 mm (5/16 in) (all brands)
7 speed – 7.3 mm (9/32 in) (Shimano HG), 7.1 mm (9/32 in) (SRAM, Shimano IG)
8 speed – 7.3 mm (9/32 in) (Shimano HG), 7.1 mm (9/32 in) (SRAM, Shimano IG)
9 speed – 6.6 to 6.8 mm (1/4 to 9/32 in) (all brands)
10 speed - 6.2 mm (1/4 in) (Shimano, Campy), 5.88 mm (7/32 in) (Campy, KMG)

Also I'm curious, it looks like some of these Campy Veloce RD11-VLBXS RDs are made in Romania rather than Italy? Any issues with that?

verktyg
Is there a chain shortage?
RobbieTunes is offline  
Old 10-03-19, 02:03 PM
  #8  
conspiratemus1
Used to be Conspiratemus
 
Join Date: Jan 2009
Location: Hamilton ON Canada
Posts: 1,504
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 292 Post(s)
Liked 245 Times in 163 Posts
OK, @verktyg, here's what I found.

Baseline (10-on-10):


10-sp chain on 10-speed cage (all Campag) -- baseline


10-sp chain on 10-speed cage -- baseline
___________________________________________________________________

Test: 9 on 10:


9-speed SRAM chain on 10-speed cage, View 1


9-speed SRAM chain on 10-speed cage, View 2

*********************************************************

The 9-speed chain goes through the cage without rubbing and appears to shift normally on the stand. I didn't want to road test it because I was worried that the 9-speed chain might foul in the 10-speed sprockets where it would be under load instead of being slack as it goes through the cage. You can see that the clearances are closer but it does pass.

9-speed chains are cheaper than 10-speed and the quick links are easily removable; the 10-sp Power-Lok SRAM link is not removable by hand and is supposed to be non-reusable. But in practice it can be opened with the little pliers tool and is then in fact reusable.

Hope this helps.

Last edited by conspiratemus1; 10-03-19 at 02:08 PM.
conspiratemus1 is offline  
Old 10-03-19, 08:57 PM
  #9  
easyupbug 
Senior Member
 
Join Date: Jan 2013
Posts: 2,085

Bikes: too many sparkly Italians, some sweet Americans and a couple interesting Japanese

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 391 Post(s)
Liked 286 Times in 209 Posts
Looking forward to hearing how it goes, as you have both and have no reason to give it a go.
easyupbug is online now  
Old 10-03-19, 09:32 PM
  #10  
verktyg 
verktyg
Thread Starter
 
verktyg's Avatar
 
Join Date: Jul 2006
Location: SF Bay Area
Posts: 3,941

Bikes: Current favorites: 1988 Peugeot Birraritz, 1984 Gitane Super Corsa, 1981 Bianchi Campione Del Mondo, 1992 Paramount OS, 1990 Bianchi Mondiale, 1988 Colnago Technos, 1985 RalieghUSA Team Pro, 1973 Holdsworth

Mentioned: 195 Post(s)
Tagged: 0 Thread(s)
Quoted: 992 Post(s)
Liked 1,041 Times in 579 Posts
I forgot top mention chainrings

Originally Posted by RobbieTunes View Post
Is there a chain shortage?
Short changed?

What I should have mentioned in my first post is, I'm going to be using new or slightly used classic 5-6-7 speed chainrings and cranks.

Unless the teeth are well worn, narrow chains tend to hang and not shift smoothly on those wider teeth.

This Campy Veloce RD looks somewhat old school like a Suntour Superbe Pro RD.




Image is everything: 7 of 9



verktyg
__________________
Don't believe everything you think! History is written by those who weren't there....

Chas. ;-)


Last edited by verktyg; 10-03-19 at 09:35 PM.
verktyg is offline  
Old 10-03-19, 09:38 PM
  #11  
ThermionicScott 
working on my sandal tan
 
ThermionicScott's Avatar
 
Join Date: Aug 2011
Location: CID
Posts: 21,883

Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)

Mentioned: 95 Post(s)
Tagged: 0 Thread(s)
Quoted: 3547 Post(s)
Liked 1,914 Times in 1,230 Posts
Could you add thin washers on each side of the pulleys to space the cage plates apart?
__________________
Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
Originally Posted by noglider
People in this forum are not typical.
RUSA #7498
ThermionicScott is offline  
Old 10-04-19, 03:10 AM
  #12  
verktyg 
verktyg
Thread Starter
 
verktyg's Avatar
 
Join Date: Jul 2006
Location: SF Bay Area
Posts: 3,941

Bikes: Current favorites: 1988 Peugeot Birraritz, 1984 Gitane Super Corsa, 1981 Bianchi Campione Del Mondo, 1992 Paramount OS, 1990 Bianchi Mondiale, 1988 Colnago Technos, 1985 RalieghUSA Team Pro, 1973 Holdsworth

Mentioned: 195 Post(s)
Tagged: 0 Thread(s)
Quoted: 992 Post(s)
Liked 1,041 Times in 579 Posts
Adding Washers

Originally Posted by ThermionicScott View Post
Could you add thin washers on each side of the pulleys to space the cage plates apart?
Yes, that's something that I've considered. I have a bunch of thin washers that came with Bullseye sealed bearing pulleys BITD. Also maybe using slightly longer pulley screws to add 1mm to the cage width.

I played around with those washers when I was experimenting with upper pulleys on non indexing RDs to provide some side to side float. The problem that I ran into was pulley screws only have about 4 turns of thread into the inner cage plate.

When you add 1 mm spacing with washers there is only about 2 1/2 to 3 turns of thread engagement. Loctite helps but I found that reducing the width of the plastic upper pulley by 1 1/2mm to 2mm provided lots of side to side float.

I have some Campy NR/SR RDs that index reasonably well. No more two forward and one back trimming of the friction shift lever.

I'd have to buy one of these Campy RDs to experiment with. I have way too many functional, even NOS RDs and I was hoping to get some ideas before spending more money on another questionable experiment.

verktyg
__________________
Don't believe everything you think! History is written by those who weren't there....

Chas. ;-)


Last edited by verktyg; 10-04-19 at 04:11 AM.
verktyg is offline  

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 - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.