Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 50
  1. #1
    I like turtles mascher's Avatar
    Join Date
    Dec 2004
    Location
    Philly
    My Bikes
    Pink Nightmare (RIP), Kona Smoke fixed conversion, Surly Steamroller, Schwinn hardtail, Raleigh singlespeed mtb conversion (soon to be RIP), Green Road Biest
    Posts
    898
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    This is how much chain slack is too much chain slack

    With a wildly unround chainring, bent stays and damn near no dropout to tension with (semi horizontal), I ran an unideal chain tension just to get a bike on the road for a winter tank.

    Now with a couple of months of salt, filth, lack of maintenance besides throwing more gunk on, and a heavy rider who likes doing the trick where you kick off and then stand one footed on the bike for a revolution or two on the chain, there's enough stretch such that I've thrown the chain three times in two days.

    Today was potentially catastrophic: just going along, just gone through a green, no traffic, and hitting a bump the chain was thrown from the chainring, wrapped around the cog rotafix style, and caused me to have my first skid with low pressure knobby tires in a small gear at like 5mph on broken pavement. Unintentionally!

    But all was well, there was a freshly littered snack wrapper on the ground to get the chain back out without too much gunking of gloves, and I'm alive to tell the tale of how much is too much slack.

    This much:



    I'm not even sure the chain tension is the culprit here, I think that my bent and tweaked fender was actually creeping sideways enough that the broken frame mount just under the zip tie touched the chain and derailed it. But if a touch can derail it, it's too slack.

  2. #2
    Senior Member
    Join Date
    Sep 2005
    Location
    Stillwater, OK
    My Bikes
    '05 Specialized Allez, '70-something Raleigh Comp GS
    Posts
    94
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    What happened to that chainring?? Is it supposed to be that eccentric?

  3. #3
    Senior Member juvi-kyle's Avatar
    Join Date
    Feb 2005
    Location
    LA
    My Bikes
    track bikes, etc
    Posts
    2,915
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    that is about what I ride...
    Quote Originally Posted by dutret
    trackosaurusrex.com is just about the best thing ever!

  4. #4
    hateful little monkey jim-bob's Avatar
    Join Date
    May 2003
    Location
    oakland, ca
    Posts
    5,274
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I hereby give up the Captain Slackchain crown to the esteemed ieatrats.

  5. #5
    cxmagazine dot com pitboss's Avatar
    Join Date
    Jun 2003
    Location
    WI
    My Bikes
    Titus road, Fort CX
    Posts
    8,270
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    with a chain that slack, you might was well ride with a blindfold on too (intended for juvi-kyle)
    Deathlap - cyclocross, training, beer,...escape hatch

  6. #6
    Senior Member
    Join Date
    Aug 2005
    Posts
    1,153
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    ghetto... nobody smilin

  7. #7
    Senior Member juvi-kyle's Avatar
    Join Date
    Feb 2005
    Location
    LA
    My Bikes
    track bikes, etc
    Posts
    2,915
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by [165]
    with a chain that slack, you might was well ride with a blindfold on too (intended for juvi-kyle)

    who said I didnt...
    Quote Originally Posted by dutret
    trackosaurusrex.com is just about the best thing ever!

  8. #8
    cxmagazine dot com pitboss's Avatar
    Join Date
    Jun 2003
    Location
    WI
    My Bikes
    Titus road, Fort CX
    Posts
    8,270
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    that looked more like a ball-gag to me than a blindfold...
    Deathlap - cyclocross, training, beer,...escape hatch

  9. #9
    I like turtles mascher's Avatar
    Join Date
    Dec 2004
    Location
    Philly
    My Bikes
    Pink Nightmare (RIP), Kona Smoke fixed conversion, Surly Steamroller, Schwinn hardtail, Raleigh singlespeed mtb conversion (soon to be RIP), Green Road Biest
    Posts
    898
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Mr. Clean
    What happened to that chainring?? Is it supposed to be that eccentric?
    It's biopace.

    I was going to have a rant in there about how it seems the opinions on chain tension here border on fanatical, but I guess it's too late.

  10. #10
    pluralis majestatis redfooj's Avatar
    Join Date
    Feb 2004
    Location
    DEN
    My Bikes
    blue fuji, black khs, yellow giant, and a little red 'Rosa
    Posts
    2,547
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    my mtb sags that much, but never went off-track even when i went bouncy-bouncy on the rocks. i wouldnt tolerate that much on a fix, though, cuz the freeplay on the pedals would drive me cojones

  11. #11
    Senior Member juvi-kyle's Avatar
    Join Date
    Feb 2005
    Location
    LA
    My Bikes
    track bikes, etc
    Posts
    2,915
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by [165]
    that looked more like a ball-gag to me than a blindfold...
    true...true
    Quote Originally Posted by dutret
    trackosaurusrex.com is just about the best thing ever!

  12. #12
    live free or die trying humancongereel's Avatar
    Join Date
    Oct 2005
    Location
    where i lay my head is home.
    My Bikes
    bianchi pista workhorse, cannondale r1000, mountain bike fixed conversion
    Posts
    6,999
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    wow. that looks like a hammock for little chain-throwing Gremlins of Slack to chill in.
    have:ea50 flats, black, light, stiff.
    144 bcd 3/32" 49t sugino track chainring, possibly 75.

    want: risers, light, stiff, 1", black if that can be
    144 bcd 46t or 47t chainring any kind or width

  13. #13
    Yay!11! I has!!!1 ImOnCrank's Avatar
    Join Date
    Jun 2005
    Location
    Eastcoast
    My Bikes
    Cocaine the white stallion, Custom Witcomb pista, (Being restored) 80's Pogliaghi Track, (destroyed) RAP Round Breeze NJS, Cannondale Jekyll 900, 84/5 Pinarello Montello (all italian)
    Posts
    1,659
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by redfooj
    my mtb sags that much, but never went off-track even when i went bouncy-bouncy on the rocks. i wouldnt tolerate that much on a fix, though, cuz the freeplay on the pedals would drive me cojones
    Like a pirate with a steering wheel up his ass?
    Bloodstains, speed kills, fast bikes, cheap thrills, French girls, fine wine...

  14. #14
    Senior Member
    Join Date
    Apr 2006
    Posts
    296
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    To lose is when you roll a bike into the back seat of a car and the chain falls off because gravity derails it.

    That probably counts as to lose.

  15. #15
    Taking "s" outta "Fast" AfterThisNap's Avatar
    Join Date
    Dec 2005
    Location
    Zoo York City
    Posts
    1,989
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    there should be zero visible droop in the chain, about 1/2 inch of deflection when you push on it max.

  16. #16
    Senior Member
    Join Date
    Aug 2004
    Location
    Chi-troit
    My Bikes
    [2004 Bianchi Eros] [1988 Colnago XL Fixed Gear Conversion]
    Posts
    577
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by ImOnCrank
    Like a pirate with a steering wheel up his ass?

    Arrrr! It's drivin' me nuts!

  17. #17
    . bbattle's Avatar
    Join Date
    Aug 2005
    Location
    Huntsville, Alabama
    My Bikes
    2014 Trek Domane 5.2, 1985 Pinarello Trevisio, 1991 Colnago Master, '06 Bianchi San Jose, 1987 Moulton Fuso, '80's Gardin Shred?, '82 John Howard(Dave Tesch)
    Posts
    11,638
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    Man, that is some serious bike abuse. Clean that bike! Get a new chain, already.

  18. #18
    Crack is back! Pipebomb's Avatar
    Join Date
    Oct 2005
    Location
    Fayetteville,AR
    Posts
    235
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah thats way too much slack! That would drive me insane. I know its a mountin bike but clean that thing a bit would ya.
    Took a city like new orleans to kill a man like johnny thunders,
    a man who died with his guitar in his hands.-MCD

  19. #19
    this bike is an aqueduct Matthew A Brown's Avatar
    Join Date
    Jan 2004
    Location
    Gainesville, FL
    My Bikes
    Villin custom touring, Medici Pro Pista, KHS Alite1000, Windsor fixed commuter
    Posts
    1,073
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Biopace!
    Villin custom touring | Raleigh XXIX | Medici Pro Pista | 1978 Schwinn Stingray

  20. #20
    Senior Member
    Join Date
    Feb 2005
    Location
    SW Florida
    My Bikes
    '04 Trek 2300; '06 Bianchi Pista; '57 Maclean; '10 Scott CR1 Pro; 2005 Trek 2000 Tandem; '09 Comotion Macchiato Tandem; 199? Novara Road
    Posts
    1,235
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by AfterThisNap
    there should be zero visible droop in the chain, about 1/2 inch of deflection when you push on it max.
    Agreed. He's an accident waiting to happen with a bike in that condition.

  21. #21
    re:member
    Join Date
    Jan 2005
    Location
    Cracow, Poland
    My Bikes
    unknown make TT bike, fixed; Romet Sport, gone; titanium Pinarello gone;Colnago with Campy C-Record/Super Record,on it's way; Funny Gianni Motta; Buehler track, Polrad track chrome; titanium MTB on 28'', fixed; Tri Wheeler, fixed
    Posts
    874
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by ieatrats
    With a wildly unround chainring, bent stays and damn near no dropout to tension with (semi horizontal), I ran an unideal chain tension just to get a bike on the road for a winter tank.

    Now with a couple of months of salt, filth, lack of maintenance besides throwing more gunk on, and a heavy rider who likes doing the trick where you kick off and then stand one footed on the bike for a revolution or two on the chain, there's enough stretch such that I've thrown the chain three times in two days.

    Today was potentially catastrophic: just going along, just gone through a green, no traffic, and hitting a bump the chain was thrown from the chainring, wrapped around the cog rotafix style, and caused me to have my first skid with low pressure knobby tires in a small gear at like 5mph on broken pavement. Unintentionally!

    But all was well, there was a freshly littered snack wrapper on the ground to get the chain back out without too much gunking of gloves, and I'm alive to tell the tale of how much is too much slack.

    This much:



    I'm not even sure the chain tension is the culprit here, I think that my bent and tweaked fender was actually creeping sideways enough that the broken frame mount just under the zip tie touched the chain and derailed it. But if a touch can derail it, it's too slack.
    Welcome to the club. People here put the blame on my cog. But it got me a new rear end

  22. #22
    Senior Member mattface's Avatar
    Join Date
    Sep 2005
    Location
    Montpeculiar, VT
    My Bikes
    Soma Rush, Fuji Cross, Raleigh Technium Mtn Bike, Ross 10 speed with Shimano 600.
    Posts
    3,951
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by ImOnCrank
    Like a pirate with a steering wheel up his ass?
    Ay! It's drivin' me nuts!

  23. #23
    ))<>((
    Join Date
    Jul 2005
    Location
    Mpls
    Posts
    108
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by humancongereel
    wow. that looks like a hammock for little chain-throwing Gremlins of Slack to chill in.
    I don't know why that made me laugh as hard as it did.

  24. #24
    domestic goddess mplsminx's Avatar
    Join Date
    Jun 2005
    Location
    mpls
    Posts
    271
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by AfterThisNap
    there should be zero visible droop in the chain, about 1/2 inch of deflection when you push on it max.
    advice which i ignored last night, instead opting to ride with droop: "i'm only going a few blocks, i'll tighten it once i get there." two blocks from my house i threw my chain going over a tiny bump and fredflintstoned to a stop. classy.

  25. #25
    ))<>((
    Join Date
    Jul 2005
    Location
    Mpls
    Posts
    108
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by mplsminx
    i threw my chain going over a tiny bump and fredflintstoned to a stop. classy.
    It is especially important to keep little or no chain slack when your shoes are your only brakes.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •