SHIMANO CN-7701 Chain

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  • 10-18-2011
    mestapho
    SHIMANO CN-7701 Chain
    Is not Clyde friendly.
    6'1" 250 lbs and have broken this chain twice now on climbs.
    It only has about 25 miles on it.

    Have a Connex in the mail, hopefully it lives up to their test results.

    Putting it out there so someone
    else doesn't waste their money.
  • 10-19-2011
    rdickens48
    I have been running this chain for a while now. I weigh between 215 and 220, sometimes a little heavier. I have not broken one of these chains yet. I even shift under load sometimes on climbs.
  • 10-19-2011
    mtnbiker72
    I used to use those before switching to KMC X series chains (and BTW never broke a CN-7701)...they come with a quick link, are very strong, shift well with SRAM and Shimano cassettes and chainrings, and usually cost quite a bit less.

    KMC X9.99 9 Speed Chain at JensonUSA.com
  • 10-19-2011
    mestapho
    Maybe I just got a lemon.
  • 10-19-2011
    JWill
    I'm currently riding at approx 255lbs, down from 295, I rode this shimano chain for the first few months of mountain biking and had the same issues. Went through a couple and then tired KMC, and had great results with much less stretch over time. However, I think what did it the most was being more conscious of shifting under load, mashing the pedals while standing up, and other types of sloppy riding/pedaling. This improved everything and made the chain and cassettes last a whole lot longer. Since all that, I've completely changed my drivetrain to a full Shimano SLX dyna-sys 10spd and am running a Shimano chain as well, with zero problems at all for months now.
  • 10-19-2011
    mestapho
    The first time I broke it was definitely due to sloppy shifting and trying to overcome it by standing on the front pedal. The second time was not though. I was just about to make it up a climb I'd never made it up before and SNAP! Sucked big time.
  • 10-19-2011
    mopartodd
    Quote:

    Originally Posted by mestapho View Post
    The first time I broke it was definitely due to sloppy shifting and trying to overcome it by standing on the front pedal. The second time was not though. I was just about to make it up a climb I'd never made it up before and SNAP! Sucked big time.

    It could have still been damaged from the first incident. I've run these chains for years at 250 lbs and never had a problem...but it certainly isn't unheard of for big guys.
  • 10-19-2011
    mestapho
    Quote:

    It could have still been damaged from the first incident. I've run these chains for years at 250 lbs and never had a problem...but it certainly isn't unheard of for big guys.
    Yeah, that's definitely a possibility.
  • 10-19-2011
    clydecrash
    I have never broken one either (was up to almost 300lbs at one time), but I am an easy shifter and a spinner (when I can spin). I haven't broken a SRAM chain either except a few times when I shifted very poorly. That all said, I have a couple of SRAM crosssteps waiting when I replace the next chain.