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  1. #1
    Senior Member morbot's Avatar
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    Why is 1/8 the standard for track stuff? What's the difference, really? I just bought a sugino 75 crankset without chainring, and im looking to buy one now, and this dude is selling a 75 chainring that's 3/32 pitch. does it really matter if im not actually racing track and get a matching chain and cog?

    oh man shouldv read sheldon/searched the forums. pre-finals week, excuse me.
    Last edited by morbot; 03-09-06 at 02:38 PM.

  2. #2
    live free or die trying humancongereel's Avatar
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    that's the width, not the pitch. the pitch is the same. one's thicker and used on geared bikes and more forgiving with chainline, the other's thinner and less forgiving if the chainline is off. that's my impression, anyhow.
    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

  3. #3
    roll'em high shants's Avatar
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    you'll be fine if you go 3/32". the general reason for advocating 1/8", as i understand it, is that the chains are stronger. many agree, many disagree. the anecdotes go both ways, as you'll probably see if many people respond to this thread. if there is any strength advantage, i'm pretty positive that you aren't heavy enough/put out enough force to obliterate a 3/32" chain.

  4. #4
    hullo. drac_vamp's Avatar
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    so long as your stuff matches, great! i think track specific chains, 1/8 ones, are a bit better as they don't allow much side to side movement like a roadchain would (since it needs to be shifted left/right in order to change gears). if a chain on a fixed gear were to move to the left or right that could spell "c-r-a-s-h" quickly.
    t.h.r.

  5. #5
    roll'em high shants's Avatar
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    Quote Originally Posted by humancongereel
    that's the width, not the pitch. the pitch is the same. one's thicker and used on geared bikes and more forgiving with chainline, the other's thinner and less forgiving if the chainline is off. that's my impression, anyhow.
    i think you're mixed up... 3/32" < 1/8" (albeit only by 1/32")

    the thicker is used for track/singlespeed (1/8"), while the thinner is used for geared applications primarily (3/32").

  6. #6
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    All chains are 1/2" pitch, except the dura ace 10mm pitch track group, which is unlikely that you will come into contact with.

    3/2" and 1/8" refer to the width.

    Chains on derailleur bicycles [3/32"] are subjected to much higher loads than on any fixed gear bicycle, regardless of gearing or rider.


    ps. There are 3/32" chains available that are not meant for geared use, thus having no "side-side" wobble or play.

  7. #7
    Senior Member morbot's Avatar
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    oh and is anyone even sure that Sugino 75 chainrings come in 3/32? the guy doesn't provide any photos for it and I guess I'm a bit skeptical

  8. #8
    hullo. drac_vamp's Avatar
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    woops!
    Last edited by drac_vamp; 03-09-06 at 02:50 PM.
    t.h.r.

  9. #9
    live free or die trying humancongereel's Avatar
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    Quote Originally Posted by shants
    i think you're mixed up... 3/32" < 1/8" (albeit only by 1/32")

    the thicker is used for track/singlespeed (1/8"), while the thinner is used for geared applications primarily (3/32").
    yep, i'm mixed up.
    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

  10. #10
    pro-noun
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    Track chainrings come in both 1/8 and 3/32

    http://www.businesscycles.com/trcomp.htm#chainrings
    think of it as a sharp ax in a world of broken down chainsaws

  11. #11
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    The way I see it, 1/8" offers no benefits, unles you are building a full "track" bike, njs or the like. For us ordinary fixers, 1/8" offers no benefits over 3/32".

    I think the prevalence of 1/8" track equipment is mainly rooted in tradition, rather than anything else.

  12. #12
    Yay!11! I has!!!1 ImOnCrank's Avatar
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    Quote Originally Posted by BostonFixed
    All chains are 1/2" pitch, except the dura ace 10mm pitch track group, which is unlikely that you will come into contact with.

    3/2" and 1/8" refer to the width.

    Chains on derailleur bicycles [3/32"] are subjected to much higher loads than on any fixed gear bicycle, regardless of gearing or rider.


    ps. There are 3/32" chains available that are not meant for geared use, thus having no "side-side" wobble or play.
    Easy does it, don't forget the elder statesman, inch pitch.
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  13. #13
    likes avocadoes
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    heh, like that info would fit here...
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    1/8" cogs and chainrings will also (all else constant) wear more slowly than 3/32", but if you replace your chain when it starts to stretch you'll never really need to worry about that.

  14. #14
    aka mattio queerpunk's Avatar
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    ugh. that was you that beat me for those S75's on ebay,wasn't it. well, in my bitterness, i'll just tell you that you paid too much, and you'll be unhappy with them, and i think you're ugly too.
    the hipster myth.

    i practice vagabondery.

  15. #15
    Senior Member morbot's Avatar
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    hah didnt you recently win some for like $100? or am i thinking of someone else?

    and i totally deserved to win these. the guy lives like 20 miles from my house in cleveland, where ill be in two weeks!

  16. #16
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    there is a formula, width of the seattube, divided by distance from center of tooth to outside of seatube something something, I remmber 14 is good?
    Ask Sheldon, Paul, Mark or some other old wise man.

  17. #17
    aka mattio queerpunk's Avatar
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    Quote Originally Posted by morbot
    hah didnt you recently win some for like $100? or am i thinking of someone else?

    and i totally deserved to win these. the guy lives like 20 miles from my house in cleveland, where ill be in two weeks!
    nah, you're thinking of someone else, but a set went for like 108 last week.

    congrats on being willing to pay more than me, though...
    the hipster myth.

    i practice vagabondery.

  18. #18
    jack of one or two trades Aeroplane's Avatar
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    Quote Originally Posted by RedDeMartini
    there is a formula, width of the seattube, divided by distance from center of tooth to outside of seatube something something, I remmber 14 is good?
    14 is good, but to get really good results, divide your BB shell width by your max heart rate in octal.
    Quote Originally Posted by Dr Irwin Goldstein
    Men should never ride bicycles. Riding should be banned and outlawed. It is
    the most irrational form of exercise I could ever bring to discussion.

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