Shimano Deore M591 SGS Rear Derailleur Long 9 SPD Help
#1
Full Member
Thread Starter
Join Date: Aug 2013
Posts: 419
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
Liked 187 Times
in
64 Posts
Shimano Deore M591 SGS Rear Derailleur Long 9 SPD Help
Looking for some help from the knowledgeable members on this forum regarding this rear derailleur. This is advertized as 9 speed cog compatible but does anyone know if I can use a basic chain with this? I'm referring to the chains used on 1980's 10-12-18 speed bikes with a 6 speed freewheel, or does it require a more narrow chain?
Thank you
Thank you
#2
Mechanic/Tourist
I'm not familiar with the width of the pulley section on that derailleur but why use a 9 speed derailleur at all if you're on a 6 block in the rear? Even if the chain will pass through the pulley assembly the narrower width would make shifting very twitchy, would tend to overshift.
#3
Full Member
Thread Starter
Join Date: Aug 2013
Posts: 419
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
Liked 187 Times
in
64 Posts
I'm open for suggestions and options. I have friction shifters with a triple crank in the front, 6 speed in the back, with a chain wrap total of 37.
Prefer not to go the used route. Thanks
Prefer not to go the used route. Thanks
#4
Mechanic/Tourist
https://sheldonbrown.com/harris/derailers-rear.html Shimano 105 long cage also works 39t wrap. RD-5701-GS
Friction can use any derailleur, but as I noted probably best to get one designed for fewer cogs. I'll admit I'm out of the loop a bit on recent equipment but I believe derailleurs designed for 8 speed and below would work
Friction can use any derailleur, but as I noted probably best to get one designed for fewer cogs. I'll admit I'm out of the loop a bit on recent equipment but I believe derailleurs designed for 8 speed and below would work
Last edited by cny-bikeman; 03-08-14 at 04:24 PM.
#5
Senior Member
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438
Bikes: Trek 5500, Colnago C-50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
Here are some possibilities: https://www.ebay.com/sch/i.html?_nkw=...illeur+7+speed
Last edited by Al1943; 03-08-14 at 04:28 PM.
#6
Senior Member
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 30,225
Bikes: Catrike 559 I own some others but they don't get ridden very much.
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 642 Times
in
363 Posts
If it was my bike I'd try it. Rear derailleurs guide the chain from the center so I doubt chain width matters much if any.
__________________
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
#7
Mechanic/Tourist
That is true - unless the pulley cage is too close to the chain pins, and there might be less play in the pulleys as well. Again, I don't have first hand experience, but I certainly would not buy the 9 speed without assurance it will work. Perhaps ask the merchant you intend to use. If you get assurance and it does not work you can return it. But better to get something more certain to work.
#8
Mechanic/Tourist
Here are some possibilities: https://www.ebay.com/sch/i.html?_nkw=...illeur+7+speed
#9
Senior Member
Join Date: Apr 2011
Posts: 336
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
My medium cage 9s Tiagra had chain rub on its cage in some gears whose chain line isn't bad when I used a 7/8s chain. Works fine with a 9s chain. Some say the rule of thumb is to use a chain designed for the narrowest of your RD, FD, and crankset.
#10
Really Old Senior Member
If you have friction shifters, you have the ability to trim the RDER to keep it centered regarding the chain.
I think you'll be OK, but it'll be just a little "fussier" to prevent chain rub.
You can use 9 speed chain though.
I think you'll be OK, but it'll be just a little "fussier" to prevent chain rub.
You can use 9 speed chain though.
#11
Full Member
Thread Starter
Join Date: Aug 2013
Posts: 419
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
Liked 187 Times
in
64 Posts
Thanks all. I called the merchant. According to the fella I spoke with, it would work. So I'm still checking and looking at different RD's but it's good that this is another viable option. Appreciate all the responses. Thanks again.
#14
Banned
Join Date: Sep 2010
Location: lower mitten
Posts: 1,555
Bikes: With round 700c & 26" wheels
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
I would just try to find older Shimano RD for your setup. I know for sure that 9 speed RD will work just fine with 9, 8, and 7 speeds. I think 6 speeds older chains may be little different and you may or may not have some issues with it. Check https://techdocs.shimano.com/techdocs/index.jsp . You may find some good info in their documents.
I woould just use older Shimano Tourney for your application. Its around $12-$14 at your LBS...
I woould just use older Shimano Tourney for your application. Its around $12-$14 at your LBS...
#16
Senior Member
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438
Bikes: Trek 5500, Colnago C-50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
I think that a 7-speed RD would stand a better chance of functioning well than a 9-speed. And based on the OP's wrap capacity needs, and possibly big cog size needs, a mountain type RD may be the best choice.
#17
Full Member
Thread Starter
Join Date: Aug 2013
Posts: 419
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
Liked 187 Times
in
64 Posts
I'm intent on picking out an RD this weekend. It's interesting... I found the chain width spec's.
My chain varies between 7.3-7.5mm at the post. A 9 speed derailleur may be asking too much. Although, looking at a 0.040"/1.2mm, the span doesn't look like too much.
My chain varies between 7.3-7.5mm at the post. A 9 speed derailleur may be asking too much. Although, looking at a 0.040"/1.2mm, the span doesn't look like too much.
- 6 speed - 7.8mm (all brands)
- 7 speed - 7.3mm (all brands)
- 8 speed - 7.1mm (all brands)
- 9 speed - 6.6 to 6.8mm (all brands)
#19
cycles per second
Join Date: Oct 2003
Location: Minnesota
Posts: 1,930
Bikes: Early 1980's Ishiwata 022 steel sport/touring, 1986 Vitus 979, 1988 DiamondBack Apex, 1997 Softride PowerWing 700, 2001 Trek OCLV 110
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 44 Post(s)
Liked 71 Times
in
48 Posts
It will work. I have a Deore MD510 SGS 9-speed rear derailer and I run 7-speed with a 6/7/8-speed chain. The current 6/7/8-speed chains are narrower than the "old" 6-speed chains. When I first got my 6-speed roadie in 1986, it came with Uniglide chain that was kinda noisy and didn't shift that well so when it wore out, I switched to the narrower Sedisport. The width of that Sedisport is what most 6/7/8-speed chains are these days.
Last edited by Gonzo Bob; 03-11-14 at 04:02 PM.
#20
SE Wis
Join Date: Apr 2005
Location: Milwaukee, WI
Posts: 10,516
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400, 2013 Novara Randonee, 1990 Trek 970
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 2731 Post(s)
Liked 3,361 Times
in
2,034 Posts
I run a 9 spd 105 rear on my daughter's old Schwinn with 6/7/8 speed chain on six indexed cogs without issue.
Thread
Thread Starter
Forum
Replies
Last Post
jeffreythree
Bicycle Mechanics
8
07-25-18 06:34 AM