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Missing ling/ powerlock on Superbe pro 7v chain

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Missing ling/ powerlock on Superbe pro 7v chain

Old 08-06-15, 01:12 AM
  #1  
jellyfishhh
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Missing ling/ powerlock on Superbe pro 7v chain

Hi,
I'm quite new here. I've just bought a bike with full superbe pro 7v 1987-1992 (almost new). I'm thinking og using this chain with a link. I know this 7v use 126 mm hubs. I don't know I have no idea if I can use this old chain with new KMC or SRAM links. Which compatible chains can I use with this superbe pro 7v? Could somebody help me?
Thank you very much
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Old 08-06-15, 01:40 AM
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Look for a 7 speed compatible chain. You can use a replacement link with an old chain, 3/32"
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Old 08-06-15, 02:01 AM
  #3  
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Greetings,

1. When you say missing, I don't understand... Please elaborate.

2. Why do you want to add a link to the chain?

3. What brand of chain is on the bike?

Bike chains have been getting narrower as freewheels and Cassettes get more sprockets. Chains made for 6 and 7 speed freewheels and cassettes are not as easy to find these days. Those systems came out in the late 70's and early 80's.

SRAM and others make chains for 6-7-8 speed sprockets. I've been using the SRAM PC850 and PC 870 chains on 6 to 8 speed setups without any problems. The PC 870 chains have nickel plated side links ans are more expensive.



A lot of newer chains come with easy to use master links that allow you to break the chain without tools.



There are tools that make this easier if you plan on frequently removing the chain for cleaning. Park Master Link Pliers work well for this.



A lot of folks like KMC brand chains. I don't have any experience with them so I can't comment...

Some chains like the uber expensive Shimano and Campagnlo models require special replacement pins... They like to sell chains!

Here's a good link that explains chains:

Chain Replacement And Repair - Cary, Raleigh, Durham, Chapel Hill, Apex - The Bicycle Chain

verktyg

Chas.
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SRAM-PC-870Chain.jpg (39.6 KB, 5 views)
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KMC-ChainLinks.jpg (47.1 KB, 9 views)
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Old 08-06-15, 02:08 AM
  #4  
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Originally Posted by verktyg View Post
When you say missing, I don't understand... Please elaborate.
"Missing Link" is what KMC calls their connecting link, like the ones you posted above the picture of the Park Tool master link pliers.

7-speed KMC Missing Links are available, like these on Amazon, but for the price, you may consider installing a completely new 7-speed chain like a KMC Z51, which comes with a Missing Link.

Last edited by SkyDog75; 08-06-15 at 02:13 AM.
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Old 08-06-15, 03:26 AM
  #5  
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Sorry I didn't explain it very well. The bike has the original superbe 7v chain. I want the connecting link for opening the chain and washing/degrease it easily and to have with me in case I snapp the chain.
I asked the compatibility question because I'm pretty sure that it's difficult and expensive ti find original suntour chains.

Thank you
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Old 08-06-15, 05:13 AM
  #6  
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I've been using KMC Missing Links for several years on 4 road bikes and 2 mtn bikes. I ain't got no complaints. I use them so I can remove the chain and slosh it clean in a bottle of mineral spirits. Dry, re-lube and back on the road. Works great.

There are several widths of Missing Links: something like 6.9mm, 7.1, 7.3, etc. I've found it's a PIA shopping for them as some places state the width and others don't. KMC 's website is helpful.

I'm not convinced that if a vendor says "7 speed" that the width is correct. Be careful. BTW I had to put a 7.3 on a 9 spd chain and it got me back to the car but did not track thru the RD properly. I've been buying the 6packs from Amazon. Decent price.
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Old 08-06-15, 05:42 AM
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I use the KMC Z72, which comes with a missing link, with my 7 speed bikes. I don't think you should have a problem using the link on your current chain. In your shoes, I might buy the whole chain/missing link combo (costs <$10) and if there are any problems then just sub in the KMC chain. If no problems, then you have your spare chain ready to go.
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Old 08-06-15, 05:50 AM
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Old 08-06-15, 09:11 AM
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The original Suntour chain most likely did not use any kind of master link. You had to use a chain tool. Can you post a photo of the chain? I'm not sure I remember ever seeing a Suntour chain designated "7V".
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Old 08-06-15, 09:22 AM
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Originally Posted by masi61 View Post
The original Suntour chain most likely did not use any kind of master link. You had to use a chain tool. Can you post a photo of the chain? I'm not sure I remember ever seeing a Suntour chain designated "7V".
"7V" = 7 vitesses = 7 speed.
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Old 08-06-15, 09:24 AM
  #11  
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Originally Posted by masi61 View Post
The original Suntour chain most likely did not use any kind of master link. You had to use a chain tool. Can you post a photo of the chain? I'm not sure I remember ever seeing a Suntour chain designated "7V".
Possibly with the French market in mind? (vitesses) EDIT: I was beaten to the punch

And I agree with you on probably requiring a chain tool
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Old 08-06-15, 09:34 AM
  #12  
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If it is the original chain I would probably just replace it as it is likely worn out anyhow.

As Prowler noted, there are different widths of links available, with the 7.1 and 7.3 mm both being for 8 speed chains (which is what we use for most vintage applications).

EDIT: I've recently been using the KMC x8.93, which can be had from ebay for $11-12 shipped. This is part nickel plated, and is a nice chain.
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Old 08-06-15, 01:07 PM
  #13  
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Originally Posted by masi61 View Post
The original Suntour chain most likely did not use any kind of master link. You had to use a chain tool. Can you post a photo of the chain? I'm not sure I remember ever seeing a Suntour chain designated "7V".
Here we go.
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Old 08-07-15, 12:51 AM
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I visited the KMC webside and saw that most 7 speed chains have the same dimensions as 8V chains. I thought they were different.
KMC x8.93 is listed as a 8 speed but I will buy it as it's the same. I don't know why they list the chains as 7 speed or 8 when it's the same (if 7.3)?

1/2” X 3/32” - 116 Links
pin length 7,3 mm
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Old 08-07-15, 01:20 AM
  #15  
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I'm using some KMC X8.93 chains, and I've been getting them for closer to $10 (including shipping) from eBay Sellers, located here in the US. Purchased in quantity the price drops down to about $8 or $9 a chain including a Missing Link.

The KMC Missing Link for 6,7,8 chains are available separately from eBay Sellers (located in the Far East) for less than $1 each, with free shipping. The Missing Links I ordered from the Far East actually arrived faster than the KMC chains that I ordered from the Eastern US.
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Old 08-07-15, 08:24 AM
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Originally Posted by jellyfishhh View Post
I visited the KMC webside and saw that most 7 speed chains have the same dimensions as 8V chains. I thought they were different.
KMC x8.93 is listed as a 8 speed but I will buy it as it's the same. I don't know why they list the chains as 7 speed or 8 when it's the same (if 7.3)?

1/2” X 3/32” - 116 Links
pin length 7,3 mm
The width of and spacing between 7- and 8-speed sprockets are really close, almost identical. Unlike with most other changes, the move from 7 to 8 didn't come from cramming one more gear into the same space, an extra gear's width was added to the freehub body and cassette. So the chains barely needed to change, and lots of us use "8-speed" chains on our 7-speed systems, like the SRAM PC-850 and 870 that Chas mentioned earlier. Works great, and makes finding a chain much easier.
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Old 08-08-15, 11:01 AM
  #17  
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I will say that chain manufacturing has come a long way since Suntour sold any of their DID-made derailer chains. Those Suntour-branded chains were poor by today's standards, in terms of shifting, wear and durability.
Their earlier, standard-width 6s chains were even worse, again both in terms of shifting and reliability (as are most of those ancient-technology chains), and require much heavier (by today's standards) lubrication.

KMC makes two 7-8s versions/widths of Missing Link, the II version is narrower (for Sachs/SRAM chain, for certain models of IG chain, and for certain of the exotics like Rohloff).

7-8s chains are also available in widths from 7.1 to 7.3mm. Narrower chain is, in general, much better for friction shifting, and for use with Suntour 7s freewheels (I use only 9s chain on those).

KMC chain is offered in both a "Z" grade and "X" grade. The "X"-grade versions are far more durable and long-lasting, and have much better dimensional consistency, especially in terms of link-to-link pitch, which in theory can affect sprocket wear.

Among 9s chains, I strongly prefer Shimano and KMC, using a KMC or SRAM connector link. Shimano and KMC 9s chain has a narrower pin width (versus the width across the bulged sideplates), unlike SRAM, so shifts more aggressively (shifts "earlier" to larger sprockets), both on the chainrings and when friction-shifting on Uniglide and Suntour freewheels. Again, this last tidbit of info is specific to 9s chain.

Last edited by dddd; 08-08-15 at 11:09 AM.
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