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 03-25-11, 02:08 PM   #1
fas2c
Rolling along
Thread Starter
 
fas2c's Avatar
 
Join Date: Jul 2007
Location: SE Alabama
Bikes:
Posts: 448
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Suntour Barcons on 9 speed?

I was thinking that vintage Suntour Barcons can run on a modern 9 speed system. It would have to be run as friction though right? I sure hope so. or I'll be
fas2c is offline   Reply With Quote
Old 03-25-11, 02:21 PM   #2
SmallieBiggs
Guest
 
Bikes:
Posts: n/a
Mentioned: Post(s)
Tagged: Thread(s)
Quoted: Post(s)
It will almost definitely work. The only problem that I can think of would be if you are trying to use a Sram 1:1 mtb derailleur as they require a lot of cable pull and might behave a little funny with a standard shifter.

Any other derailleur will work perfectly with your friction shifters.
  Reply With Quote
Old 03-25-11, 02:25 PM   #3
AngelGendy
Nipples of Steel!
 
AngelGendy's Avatar
 
Join Date: Feb 2011
Location: ABQ
Bikes: Borthwick, Specialized, Ross
Posts: 414
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you measure most cassettes the difference between the first and last chainring will be similar, it's the spacers between the rings that vary. My 8spd ultegra was about the same as my 10spd DA.
AngelGendy is offline   Reply With Quote
Old 03-25-11, 02:43 PM   #4
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 22,134
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 1127 Post(s)
getting #9 in a space for 8, thins out the gap between cogs.

Hyperglide tooth profiles are eager to shift early.

Even wide spaced 6 speeds are willing to jump,
with the side of the cog shift ramps lifting the chain quite readily.

I liked older freewheel tooth profile for friction shifting ,
because the chain stayed put, until moved off with a slight overshift
and pull back to re center the pulley over the cog.
but the designers dropped that .

I'm using the IG hub drivetrain bikes most these days..

Last edited by fietsbob; 03-25-11 at 02:47 PM.
fietsbob is offline   Reply With Quote
Old 03-25-11, 02:55 PM   #5
Jeff Wills
Insane Bicycle Mechanic
 
Jeff Wills's Avatar
 
Join Date: Mar 2008
Location: other Vancouver
Bikes:
Posts: 8,065
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 75 Post(s)
Quote:
Originally Posted by fas2c View Post
I was thinking that vintage Suntour Barcons can run on a modern 9 speed system. It would have to be run as friction though right? I sure hope so. or I'll be
OK- assuming they're indexing Barcons and not older Power Ratchet Barcons, they're designed to pull a derailleur across a 7-speed freewheel, which is 32.4mm* from first to last cog. A 9-speed cassette is 36.5mm* , so your arrangement will need to move the derailleur an additional 4mm, plus whatever wiggle room is needed to make the shift. In other words, it might work, it might not. I think it'll work- in friction mode.

*reference: http://www.sheldonbrown.com/cribsheet-spacing.html
__________________
Jeff Wills

Comcast nuked my web page. It will return soon..
Jeff Wills is offline   Reply With Quote
Old 03-25-11, 04:07 PM   #6
fas2c
Rolling along
Thread Starter
 
fas2c's Avatar
 
Join Date: Jul 2007
Location: SE Alabama
Bikes:
Posts: 448
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Well that is good news if it does. It is shifting an Ultegra cassette with Shimano 105 RD.
fas2c is offline   Reply With Quote
Old 03-25-11, 07:46 PM   #7
Mr IGH
afraid of whales
 
Mr IGH's Avatar
 
Join Date: Apr 2009
Location: Front Range, CO
Bikes:
Posts: 3,839
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
I'm shifting a old Deore deer head derailliuer with vintage '84 SunTour ratchet barcons on a Shimano 9 speed cassette, works great!
Mr IGH is offline   Reply With Quote
Old 03-25-11, 08:30 PM   #8
fas2c
Rolling along
Thread Starter
 
fas2c's Avatar
 
Join Date: Jul 2007
Location: SE Alabama
Bikes:
Posts: 448
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Mr IGH View Post
I'm shifting a old Deore deer head derailliuer with vintage '84 SunTour ratchet barcons on a Shimano 9 speed cassette, works great!
That is great to know! Very good, makes me happy Was it hard to tweak or was it pretty easy?
fas2c is offline   Reply With Quote
Old 03-25-11, 08:43 PM   #9
Mr IGH
afraid of whales
 
Mr IGH's Avatar
 
Join Date: Apr 2009
Location: Front Range, CO
Bikes:
Posts: 3,839
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
I adjusted the limited screws just like any set up. Plenty-o-throw, plenty-o-pull, takes a bit of a deft hand. I'm not racing crits or sucking wheels so it works fine for me. Gets my retro on with lots gears for cheap. (Tiagra clusters rule!)
Mr IGH is offline   Reply With Quote
Old 03-25-11, 09:16 PM   #10
fas2c
Rolling along
Thread Starter
 
fas2c's Avatar
 
Join Date: Jul 2007
Location: SE Alabama
Bikes:
Posts: 448
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Right On! That is what I wanted to hear! I'm excited
fas2c is offline   Reply With Quote
Old 03-27-11, 08:18 AM   #11
Grand Bois
Senior Member
 
Grand Bois's Avatar
 
Join Date: Mar 2005
Location: Pinole, CA, USA
Bikes:
Posts: 16,827
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 135 Post(s)
Quote:
Originally Posted by fietsbob View Post
getting #9 in a space for 8, thins out the gap between cogs.

Hyperglide tooth profiles are eager to shift early.

Even wide spaced 6 speeds are willing to jump,
with the side of the cog shift ramps lifting the chain quite readily.

I liked older freewheel tooth profile for friction shifting ,
because the chain stayed put, until moved off with a slight overshift
and pull back to re center the pulley over the cog.
but the designers dropped that .

I'm using the IG hub drivetrain bikes most these days..
They dropped that because it won't work with indexed shifting. Index derailers must shift early. I detest Campy NR/SR because of that late shifting and readjustment after every shift, but some oldtimers like it because they're used to it. I'm an oldtimer, but I never got used to it. I find it especially annoying with Barcons.
Grand Bois is offline   Reply With Quote
Old 03-27-11, 01:11 PM   #12
Puget Pounder
Wookie Jesus inspires me.
 
Puget Pounder's Avatar
 
Join Date: Mar 2011
Location: Seattle, WA
Bikes:
Posts: 2,225
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Mr IGH View Post
I adjusted the limited screws just like any set up. Plenty-o-throw, plenty-o-pull, takes a bit of a deft hand. I'm not racing crits or sucking wheels so it works fine for me. Gets my retro on with lots gears for cheap. (Tiagra clusters rule!)
I've seen some set ups where the barcons won't pull through the 9 speeds and some where they barely make it to 10 with limit screws all the way out. I guess it depends on shifter/derailleur combo. I've heard a lot of people say that friction shifting on >8 speed clusters gets a little twitchy. A few have said that it's actually really nice because the chain is less likely to sit inbetween 2 gears. Something to keep in mind.
Puget Pounder is offline   Reply With Quote
Old 03-27-11, 06:37 PM   #13
fuzz2050
Real Men Ride Ordinaries
 
fuzz2050's Avatar
 
Join Date: Sep 2008
Bikes:
Posts: 3,707
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Quote:
Originally Posted by Puget Pounder View Post
I've seen some set ups where the barcons won't pull through the 9 speeds and some where they barely make it to 10 with limit screws all the way out. I guess it depends on shifter/derailleur combo. I've heard a lot of people say that friction shifting on >8 speed clusters gets a little twitchy. A few have said that it's actually really nice because the chain is less likely to sit inbetween 2 gears. Something to keep in mind.
Do recall that plenty of bikes come stock with bar end shifters (with friction modes) and 9 speed clusters and have no trouble. In fact, every bar end shifter made (Except the new 10 speeds, or so I've heard) have a friction mode, that should say enough.
fuzz2050 is offline   Reply With Quote
Old 03-28-11, 06:30 AM   #14
Puget Pounder
Wookie Jesus inspires me.
 
Puget Pounder's Avatar
 
Join Date: Mar 2011
Location: Seattle, WA
Bikes:
Posts: 2,225
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by fuzz2050 View Post
Do recall that plenty of bikes come stock with bar end shifters (with friction modes) and 9 speed clusters and have no trouble. In fact, every bar end shifter made (Except the new 10 speeds, or so I've heard) have a friction mode, that should say enough.
Yes, but we are also talking about Barcons (, SunTour), which pre-date friction/index combo bar end shifters to the extent of 5 speed clusters, so it isn't that obvious. They don't seem to pull as much as more modern shifters, so it is something to watch out for.
Puget Pounder is offline   Reply With Quote
Old 03-28-11, 07:26 AM   #15
Doohickie 
You gonna eat that?
 
Doohickie's Avatar
 
Join Date: Sep 2008
Location: Fort Worth, Texas Church of Hopeful Uncertainty
Bikes: 1966 Raleigh DL-1 Tourist, 1973 Schwinn Varsity, 1983 Raleigh Marathon, 1994 Nishiki Sport XRS
Posts: 14,460
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
I have an old pair of Barcons (power ratchets) driving a 7 speed cassette with no problems and a lot of extra travel. I will be trying a 9 speed cassette eventually.
__________________
I stop for people / whose right of way I honor / but not for no one.



Originally Posted by bragi "However, it's never a good idea to overgeneralize."
Doohickie 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 12:37 AM.