Recumbent Chain Life

Discussion in 'Recumbent bicycles' started by Drrecumbnt, Jun 16, 2003.

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  1. Drrecumbnt

    Drrecumbnt Guest

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  2. bentcruiser

    bentcruiser New Member

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    My chain has about 1400 miles on it with no signs of wear.

    Derek

     
  3. Cletus Lee

    Cletus Lee Guest

    In article <[email protected]>, [email protected] says...
    > I was wondering if anyone has tracked the mileage/ life of their 9-speed chain. Thanks Bob Bryant
    > http://www.recumbentcyclistnews.com
    >
    I did on my OEM chain on my '99 RANS Stratus. I got 7906 miles out of a KMC 9 spd.

    I lost my data point on the original Shimano Chain that came on my Lightning Voyager. The bike has
    about 6500 miles now and about 5700 when I replaced the chain.
    --

    Cletus D. Lee Bacchetta Giro Lightning Voyager http://www.clee.org
    - Bellaire, TX USA -
     
  4. In article <[email protected]>, [email protected] says...
    >
    >I was wondering if anyone has tracked the mileage/ life of their 9-speed chain. Thanks Bob Bryant

    How about 8 speed? I replace the SRAM PC-58 on my Vision VR-42 after 6500 miles, though I probably
    didn't need to, as it only showed about 0.5% "stretch." (The replacement guideline is to replace
    when over 1% stretched.)

    Steve Christensen Midland, MI
     
  5. John

    John Guest

    DrRecumbnt wrote:
    > I was wondering if anyone has tracked the mileage/ life of their 9-speed chain. Thanks Bob Bryant
    > http://www.recumbentcyclistnews.com

    I don't have a 9 speed, but this is still relevent to the topic of recumbent chain life. I replaced
    the chain on my Burley Django after 4000 miles. It was on the bike when I purchased it last year. 8
    speed rear cluster, SRAM PC38 chain, SRAM 9.0 rear derailleur. The chain snapped twice in one week,
    and upon further examination, I found one more link that was cracking. The chain was always well
    maintained. I'd checked for chain stretch the week beore, and the chain seemed to be good in that
    respect. The LBS thought it was because I down shifted on steep grades too often. I've since noticed
    that the rubber chain idler wheel has a pretty steep groove cut into it. I've got a new one on
    order. I was wondering if the groove could have contributed to the chain breaking. Should the idler
    wheels be lasting longer? How many miles do other people get out of their rubber idler wheels?

    - John
     
  6. Drrecumbnt

    Drrecumbnt Guest

    Every chain idler is different. I'm saying inspect every 6-12 months. My only idler wear out came
    fast (split in half) 20 miles out, about 7:30 pm. I had to move the second idler and limp home.

    I'm told that shifting under load shortens the life of a chain. I once snapped a new chain while
    shifting under load.

    Bob Bryant http://www.recumbentcyclistnews.com
     
  7. Last one had 7400 km / 4600 miles on it when replaced. Everything was still working OK, but I wanted
    to fit smaller chainrings.

    Dave Larrington - http://www.legslarry.beerdrinkers.co.uk/
    ===========================================================
    Editor - British Human Power Club Newsletter
    http://www.bhpc.org.uk/
    ===========================================================
     
  8. Bob, I put a new chain on every year. However, IMO depending on conditions and chain maintenance
    somewhere between 5 and 10K for a chain 7, 8, or 9. Am I reading somthing into your
    request...specifically 9 speed chains? Wear faster? Break more often? The closest to breaking a 9
    speed I have come was the result of improper shimano connecting pin insertion by the factory
    assembeller. I spotted it on a routine chain inspection. I now use SRAM or KMC chains with their
    respective QuickLink or MissingLink system. Some seem to think that there is some breakage problem
    with 9 speed chains. I think this problem has to do more with the pins on the Shimano chains.

    --
    Jude....///Bacchetta AERO St. Michaels and Tilghman Island.. Maryland Wheel Doctor Cycle and Sports,
    Inc 1-800-586-6645 "Dave Larrington" <[email protected]> wrote in message
    news:[email protected]...
    > Last one had 7400 km / 4600 miles on it when replaced. Everything was
    still
    > working OK, but I wanted to fit smaller chainrings.
    >
    > Dave Larrington - http://www.legslarry.beerdrinkers.co.uk/
    > ===========================================================
    > Editor - British Human Power Club Newsletter
    > http://www.bhpc.org.uk/
    > ===========================================================
     
  9. Cletus Lee

    Cletus Lee Guest

    I came into 'bentdom with the impression that a chain might last 3000 miles with care. I also
    thought that a KMC chain was a piece of crap since it was not Shimano or SRAM/Sachs. The OEM KMC
    chain that came on my '99 RANS Stratus had to be the lowest of the low in chain. At about 3000 miles
    I bought a 'good' chain (SRAM) with the intention of replacing the KMC 'piece of junk' on my
    Stratus. On checking I saw the KMC chain had usable life left in it and others pointed out that the
    longer chain path on a bent afforded a longer lifespan than might be expected on a DF. So, I left it
    on. And on and on. I did replace it 8000 miles but it could have lasted a little longer.

    I do agree that the best replacement chain is SRAM. I like the Quick link. Shimano on the other hand
    does not recommend the use of quick links and requires special pins. These pins are expensive (~$1)
    when compared to the included SRAM Link (free).

    Since 9-speed chains are narrower and require closer tolerances, I wonder if all 9 spd. chain
    problems might be related to improperly installed or reused link pins. All manufacturers caution
    against reusing the old link pins.

    In article <[email protected]>, [email protected] says...
    > This isn't a 9-speed witch hunt : - ) In theory, it makes sense that 9-speeds are not as durable
    > and are more finicky to tune - - and based on earlier feedback and experiences, I've written
    > both before.
    >
    > However, I'm not hearing about either as much these days. My 9-speed test bikes have been almost
    > completely dependable (aside from BikeE RX chain snapping under load). I'm pro 9/27 speed.
    >
    > As for chain brand, I'm pro SRAM. I wouldn't recommend replacing KMC just because it's KMC, but
    > upon replacement, I'd recommend SRAM. This dates back to personal preference, our KMC chain test
    > from a few years back (and discussions with the folks at KMC), and replacement availability.
    >
    > So far the record chain mileage I've had reported to me is 10K miles on a 9-speed KMC in Florida.
    >
    > Bob Bryant http://www.recumbentcyclistnews.com
    >

    --

    Cletus D. Lee Bacchetta Giro Lightning Voyager http://www.clee.org
    - Bellaire, TX USA -
     
  10. Warren Berger wrote:
    > John
    >
    >
    >>I replaced the chain on my Burley Django after 4000 miles. order. I was wondering if the groove
    >>could have contributed to the chain breaking. Should the idler wheels be lasting longer?
    >
    >
    > Perhaps Hostel Shoppe knows something about this?
    >
    > http://www.hostelshoppe.com/cgi-bin/readitem.pl?Accessory=1055797970
    >
    > Warren
    I have one on order from them. I sent them a note, and the reply indicated that at 4000 miles I'd
    gotten my money's worth out of it.
     
  11. In article <[email protected]>, [email protected] says...

    >So far the record chain mileage I've had reported to me is 10K miles on a 9-speed KMC in Florida.
    >
    >Bob Bryant

    That's pretty impressive. But unless somone reports the amount of stretch in the chain when they
    replaced it you can't really compare these figures. I can well imagine that some folks would be so
    put off by the expense of buying 3 boxes of chain that they might use the original way past its
    proper lifespan. And by then you probably need a new cassette and crankset too.

    Steve Christensen
     
  12. Dave Is Here

    Dave Is Here Guest

    Warren and all I usually run an O-ring in the groove of the power side idler of my Wishbone. They
    last about a 1000 miles and make the idler much quieter. Dave Balfour

    [email protected] (Warren Berger) wrote in message
    news:<[email protected]>...
    > John
    >
    > > I replaced the chain on my Burley Django after 4000 miles. order. I was wondering if the groove
    > > could have contributed to the chain breaking. Should the idler wheels be lasting longer?
    >
    > Perhaps Hostel Shoppe knows something about this?
    >
    > http://www.hostelshoppe.com/cgi-bin/readitem.pl?Accessory=1055797970
    >
    > Warren
     
  13. Bill Anton

    Bill Anton Guest

    Bob,

    My R-40 came with a KMC chain and an HG-50 cassette. After only 1000 miles I had to replace both. I
    went with an SRAM PC-59 chain (2.5 chains, really) and a Shimano XT cassette. 3000 miles later,
    still no measurable chain "stretch" or chain skip under load. Not sure whether KMC can take all the
    blame, though. I may not have been cleaning the chain often enough. Also, it seems to me that the
    new XT cassette might be using a higher grade steel that wears longer.

    As for chain breakage, this has happened to me only once, on a borrowed low-end 7/21-speed Trek
    mountain bike. Not having a chain tool with me, I had to just wrap the chain around the handlebar
    and "kick-scoot" the bike home. Later on I learned about the shoelace trick--DOH!

    Bill Anton 2001 Vision R-40 SWB OSS Lubbock, TX, USA

    [email protected] (DrRecumbnt) wrote in message
    news:<[email protected]>...
    > This isn't a 9-speed witch hunt : - ) In theory, it makes sense that 9-speeds are not as durable
    > and are more finicky to tune - - and based on earlier feedback and experiences, I've written
    > both before.
    >
    > However, I'm not hearing about either as much these days. My 9-speed test bikes have been almost
    > completely dependable (aside from BikeE RX chain snapping under load). I'm pro 9/27 speed.
    >
    > As for chain brand, I'm pro SRAM. I wouldn't recommend replacing KMC just because it's KMC, but
    > upon replacement, I'd recommend SRAM. This dates back to personal preference, our KMC chain test
    > from a few years back (and discussions with the folks at KMC), and replacement availability.
    >
    > So far the record chain mileage I've had reported to me is 10K miles on a 9-speed KMC in Florida.
    >
    > Bob Bryant http://www.recumbentcyclistnews.com
     
  14. Bob A few notes on this topic KMC claims to make 90% of Shimano chains. Only the low cost found in
    third world countries are made by some other manufacture. When Rotator first started making
    recumbents we used to piece 3 chains together and push the pins in. This resulted in a 10% failure
    rate and a couple lost races. We now use chain from a roll and "quick links" and have not had a
    failure in many years. Pushing pins in is a big "no no" 9 speed chain on every thing...7,8, or 9
    speed clusters. Every year after the rainy season I replace the chains on my daily rider. 5000 miles
    My Ti Pursuit is a 63 speed using a Nexus 7 for the mid-drive with Shimano 9 Durace on the wheel.
    7.5 to 1 ratio change on a 20" rear wheel. Most bikes have a 4 to 1 ratio change. My chain rotates
    up to 3.5 times more then most other chains. Front chain does not go thru a derailleur where the
    rear chain does. Front chain showed little stretch, less the 1/2". Rear chain stretched over 1 1/2"

    Seems rear derailleurs work chains hard. Steve "Speedy" Delaire

    DrRecumbnt wrote:

    > I was wondering if anyone has tracked the mileage/ life of their 9-speed chain. Thanks Bob Bryant
    > http://www.recumbentcyclistnews.com

    -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1
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