Advertise on Bikeforums.net



User Tag List

Results 1 to 11 of 11
  1. #1
    Senior Member
    Join Date
    Jul 2007
    Location
    Cedar City, UT
    Posts
    168
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Identifying speed of assorted cogs

    A bunch of loose cogs have come into my possession. How can I identify their speed so I can maybe upgrade some of my bikes and sell the rest (or see if I can get credit for them at my LBS)? I have:
    • 2 16t
    • 4 15t
    • 4 14t
    • 3 13t
    • 1 14t (with spacer)
    • 1 13t (with spacer)
    • 5 12t (with spacer)
    • 1 11t (with spacer)
    • 1 18-21-24-28-32
    • 2 21-24-27
    • 1 21-23-25
    • 1 21-23
    • 3 17-19
    • 5 9-speed spacer rings
    • 3 10-speed spacer rings
    • 1 small fat spacer (not sure the purpose)
    • 2 lockrings

    A related question: does anyone have any experience selling a bunch of individually cheap bike parts online? What's the best way to do it? Sell the whole thing as a grab bag?

  2. #2
    slow as I ever was Ex Pres's Avatar
    Join Date
    Dec 2007
    Location
    an imposter living in the 35223
    My Bikes
    see signature
    Posts
    5,455
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    You'll need an accurate caliper and compare them to this chart.
    72 special CNC ___________ 72 Frejus (ala Legnano) __73 Holdsworth Record
    78 Raleigh Professional_____ 80 Ranson_____________ 80 unknown French (SS)
    82 Peugeot PXN10_________83 Trek 600____________ 85 Gianni Motta
    85 Trek 560______________88 Guerciotti GLX
    90 Miele Gara_____________02 Casati Dardo (g/b\k)___02 Casati Dardo (y/blk)
    03 Casati Dardo___________08 BF IRO (fixed)________10 Vassago Fisticuff (IGH)

  3. #3
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,298
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by iain.dalton View Post
    A bunch of loose cogs have come into my possession. How can I identify their speed so I can maybe upgrade some of my bikes and sell the rest (or see if I can get credit for them at my LBS)? I have:
    • 2 16t
    • 4 15t
    • 4 14t
    • 3 13t
    • 1 14t (with spacer)
    • 1 13t (with spacer)
    • 5 12t (with spacer)
    • 1 11t (with spacer)
    • 1 18-21-24-28-32
    • 2 21-24-27
    • 1 21-23-25
    • 1 21-23
    • 3 17-19
    • 5 9-speed spacer rings
    • 3 10-speed spacer rings
    • 1 small fat spacer (not sure the purpose)
    • 2 lockrings

    A related question: does anyone have any experience selling a bunch of individually cheap bike parts online? What's the best way to do it? Sell the whole thing as a grab bag?
    The I.D of 7/8/9/10 speed chains are all 3/32.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  4. #4
    Senior Member
    Join Date
    Jul 2007
    Location
    Cedar City, UT
    Posts
    168
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I don't have accurate calipers, and a Froogle search seems to indicate that calipers that can detect the difference between an 8-speed and a 9-speed would cost a lot. If they're so close in width, is mixing allowed?

    Also, is diameter the right word for the distance between the inside faces of two plates on a chain?

  5. #5
    Senior Member Bill Kapaun's Avatar
    Join Date
    Feb 2007
    Location
    Mid Willamette Valley, Orygun
    My Bikes
    86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
    Posts
    6,495
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    I've used a couople "wrong size" cogs in my "custom cassettes" wothout issue.
    I'm not sure if I totally agree with that chart though. I made up an 8 speed cassette, using 7 speed cogs. I had to thin my spacers to about 2.75MM.

  6. #6
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    24,788
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by iain.dalton View Post
    I have:
    1 14t (with spacer)
    1 13t (with spacer)
    5 12t (with spacer)
    1 11t (with spacer)
    I believe you mean the cog and spacer are all one piece. These are all first position cogs but could be from any speed from 7 to 10.

    Quote Originally Posted by iain.dalton View Post
    1 18-21-24-28-32
    2 21-24-27
    1 21-23-25
    The 18x32 is almost certainly a 9-speed and came from an MTB cassette. The 21x25 and 21x27 can be either 9-speed or 10-speed.

    Quote Originally Posted by iain.dalton View Post
    1 small fat spacer (not sure the purpose)
    This is probably a 4.5 mm spacer to allow a 7-speed cassette to be in stalled on an 8/9/10-speed freehub body.

    As mentioned,you need to buy or borrow a good caliper or, better yet, a micrometer.

  7. #7
    Senior Member
    Join Date
    Jul 2007
    Location
    Cedar City, UT
    Posts
    168
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I wikipedia'd 'micrometer' and wow, what an ingenious design. I still would rather not buy one since I can't foresee any further use for it, so I'll try the grab bag approach.

  8. #8
    Insane Bicycle Mechanic Jeff Wills's Avatar
    Join Date
    Mar 2008
    Location
    other Vancouver
    Posts
    6,418
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Shimano cogs are typically marked with their "Code". Look for one or two letters near the inside diameter. It should be a single capital (i.e. "K") or two lowercase (i.e. "ab"). Then refer to the Shimano combinations at http://www.sheldonbrown.com/k7.html . This should give you a start.

    Shimano says you can't mix cogs with different Codes. In practice, it's rarely a problem. Mix, match, slice, dice, julienne! (Maryanne or Ginger?)
    Jeff Wills

    All my bikes.

  9. #9
    Senior Member
    Join Date
    Jul 2007
    Location
    Cedar City, UT
    Posts
    168
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm finding codes not in those tables:
    • XC-XC-WL
    • ZF-ZI-ZI
    • YF-YF-YF
    • CK-CK (the two-cog ones also have text not on the face, but near
      the inner ring, in this case, 21-23 DA)
    • YE-YE (17-19 YH)

    And so on.

    I did identify the cluster of 5 cogs. It says "QR", "18t", "YG",
    "4", and "P" on the smallest (18t) cog. P is the name of the 12-32
    8-speed cassette, but I can't decode the rest. The inner ring says,
    "SHIMANO / CS-M900 / Y 3 TYPE-P / JAPAN".

  10. #10
    Senior Member Bill Kapaun's Avatar
    Join Date
    Feb 2007
    Location
    Mid Willamette Valley, Orygun
    My Bikes
    86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
    Posts
    6,495
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Jeff Wills View Post
    Shimano cogs are typically marked with their "Code". Look for one or two letters near the inside diameter. It should be a single capital (i.e. "K") or two lowercase (i.e. "ab"). Then refer to the Shimano combinations at http://www.sheldonbrown.com/k7.html . This should give you a start.

    Shimano says you can't mix cogs with different Codes. In practice, it's rarely a problem. Mix, match, slice, dice, julienne! (Maryanne or Ginger?)
    Good point about the CODES!

    I also agree that mixing isn't a problem, at least not for me.
    I've mixed an-
    "E", 12-14-16-18-21-24-28 and an
    "H", 13-15-17-19-21-23-26 to make a
    13-14-15-16-17-19-21-24. (thinned spacers & 8 speed FH body))
    Maybe the 1T increments help?

  11. #11
    Senior Member
    Join Date
    Jul 2007
    Location
    Cedar City, UT
    Posts
    168
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The only problem, as far as I understand it, with mixing codes, is that ramps and pins are designed to allow a smooth transition to the next cog, and if that cog is the wrong one, the transition won't be as smooth. This is hardly a problem, as cogs got along fine for decades without any ramps or pins at all.

    Does anyone have any ideas what the codes I found mean? I only listed codes found on clusters, but the single cogs have them too, saying "ZI", "DD", "DB", et al. There are codes all over bikes, and sites explaining many of them, but I can't find any info on them.

Posting Permissions

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