Advertise on Bikeforums.net



User Tag List

Results 1 to 23 of 23
  1. #1
    Senior Member O-Town's Avatar
    Join Date
    Feb 2006
    Location
    Saint Pete
    My Bikes
    Seven Axiom Steel, Surly LHT
    Posts
    254
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Bottom Bracket conversion to cartridge

    I went into the LBS the other day with my early 70's English made Falcon to see if I could get some parts. On my list was a new BB. They told me that the BB was 66mm (shell width) and I would have to make my old cup and cone BB work.

    Does the mechanic know what he is talking about? Was he not measuring right? No one makes (or made) a cartridge that will work?
    Geee that would be nice.

  2. #2
    Elitist Troglodyte DMF's Avatar
    Join Date
    Jun 2006
    Location
    Dallas
    My Bikes
    03 Raleigh Professional (steel)
    Posts
    6,896
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Sheldon Brown doesn't list a 66mm bracket width, and he's into old bikes.
    Last edited by DMF; 12-11-06 at 03:11 PM.
    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

  3. #3
    JRA...
    Join Date
    Oct 2003
    Location
    philly
    My Bikes
    trek 520 & 736, DeRosa Professional, Fuji Professional, Raleigh International 3-speed, Saronni (any info people?), Humber 3-speed, Raleigh Sports, Carlton Grand Prix coming soon!
    Posts
    839
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    "68 mm" bb shells is somewhat nominal, sometimes they're a little more or less. a 68 cartidge should work fine, you might need a shim. the only trouble you could possibly have is if it's whitworth thread, which is unlikely for that bike.

    fwiw, there were 65 mm shells on 50s-60s track bikes, and perhaps road bikes.

  4. #4
    cyclist/gearhead/cycli... moxfyre's Avatar
    Join Date
    Oct 2004
    Location
    DC / Maryland suburbs
    My Bikes
    Homebuilt tourer/commuter, modified-beyond-recognition 1990 Trek 1100, reasonably stock 2002-ish Gary Fisher Hoo Koo E Koo
    Posts
    4,172
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by O-Town
    I went into the LBS the other day with my early 70's English made Falcon to see if I could get some parts. On my list was a new BB. They told me that the BB was 66mm (shell width) and I would have to make my old cup and cone BB work.

    Does the mechanic know what he is talking about? Was he not measuring right? No one makes (or made) a cartridge that will work?
    I've never heard of a "66 mm" BB. Most old English bikes use the English/ISO standard sized 68 mm BB shell, which is common as dirt and takes all normal cartridges. If the *threading* matches that of a standard 68 mm BB shell (http://sheldonbrown.com/gloss_bo-z.html#bottom), you can use a standard 68 mm cartridge... who cares if it is a mm or two off in shell width?

    In the case that you actually have an obscure type of threading on your BB, which I find highly unlikely, Sheldon Brown again comes to the rescue! His shop sells the new YST threadless bottom brackets. They are only $20 and will fit pretty much any BB shell, including those with damaged threads... http://sheldonbrown.com/harris/bottombrackets.html#yst Prepping the frame for one of these BBs requires chamfering the BB shell with a shop tool, should cost maybe $10 at a well-equipped shop. This is a great product from what I have heard.
    My bikes | Linux and Python stuff | Photo gallery

    Sheldon Brown, I miss you. Thanks for the advice, ideas, humor, and infectious enthusiasm for everything bikes...

  5. #5
    Senior Member O-Town's Avatar
    Join Date
    Feb 2006
    Location
    Saint Pete
    My Bikes
    Seven Axiom Steel, Surly LHT
    Posts
    254
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I was surprised to hear 66mm too. I have seen pictures of other Falcon bikes that have newer BB's but I can't tell if they are cartridge type from the photo.

    I think I'm going to get another opinion on the size.

    Thanks!
    Geee that would be nice.

  6. #6
    dck
    dck is offline
    Senior Member
    Join Date
    Sep 2005
    Location
    The Peninsula
    My Bikes
    '62 Peugeot UO8, '63 Schwinn Superior, ;72 Peugeot PX-10, '74 Motobecane LeChampion, '74 Peugeot UO18, '81 Fuji S12-S Mixte
    Posts
    622
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    You oughta measure it yourself. In any case it shouldn't make any difference. You might end up with a couple mm of cartridge threads showing after you tighten it up but that's all. If you don't like how that looks, put an old threaded cup lockring on it to hide the exposed threads and make it look more vintage.

  7. #7
    Elitist Troglodyte DMF's Avatar
    Join Date
    Jun 2006
    Location
    Dallas
    My Bikes
    03 Raleigh Professional (steel)
    Posts
    6,896
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Some cartridge BBs would work if the thread is ISO (not Whitworth). I say some because some have an adapter (the non-drive size separate collar) that does not bottom on the cartridge, like Shimano Octalinks. But some do bottom, meaning they have a lower limit to the BB width that they fit, like Shimano UN-53.

    Chances are good, though, that a UN-53 would fit with a 1-2mm spacer set.
    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

  8. #8
    cyclist/gearhead/cycli... moxfyre's Avatar
    Join Date
    Oct 2004
    Location
    DC / Maryland suburbs
    My Bikes
    Homebuilt tourer/commuter, modified-beyond-recognition 1990 Trek 1100, reasonably stock 2002-ish Gary Fisher Hoo Koo E Koo
    Posts
    4,172
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DMF
    Some cartridge BBs would work if the thread is ISO (not Whitworth). I say some because some have an adapter (the non-drive size separate collar) that does not bottom on the cartridge, like Shimano Octalinks. But some do bottom, meaning they have a lower limit to the BB width that they fit, like Shimano UN-53.

    Chances are good, though, that a UN-53 would fit with a 1-2mm spacer set.
    +1 on the spacer. If the shell is really 66 mm and ISO threaded, spacers will prevent it from bottoming out and everything should work fine.
    My bikes | Linux and Python stuff | Photo gallery

    Sheldon Brown, I miss you. Thanks for the advice, ideas, humor, and infectious enthusiasm for everything bikes...

  9. #9
    Senior Member Grand Bois's Avatar
    Join Date
    Mar 2005
    Location
    Pinole, CA, USA
    Posts
    15,359
    Mentioned
    14 Post(s)
    Tagged
    0 Thread(s)
    I heard that the YST bottom brackets are junk.

  10. #10
    cyclist/gearhead/cycli... moxfyre's Avatar
    Join Date
    Oct 2004
    Location
    DC / Maryland suburbs
    My Bikes
    Homebuilt tourer/commuter, modified-beyond-recognition 1990 Trek 1100, reasonably stock 2002-ish Gary Fisher Hoo Koo E Koo
    Posts
    4,172
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dirtdrop
    I heard that the YST bottom brackets are junk.
    Okey doke... I've heard from at least two satisfied users of them, though they've only been using 'em for a couple months. I don't have any experience with them personally.
    My bikes | Linux and Python stuff | Photo gallery

    Sheldon Brown, I miss you. Thanks for the advice, ideas, humor, and infectious enthusiasm for everything bikes...

  11. #11
    Senior Member Grand Bois's Avatar
    Join Date
    Mar 2005
    Location
    Pinole, CA, USA
    Posts
    15,359
    Mentioned
    14 Post(s)
    Tagged
    0 Thread(s)
    There was a message on the Harris site saying that they were no longer selling them due to quality issues. It's gone now, but if you try to order one, you'll find out they're out of stock. Somebody posted here somewhere that the bearings fell out of them. What can you expect for 20 bucks?

  12. #12
    Dolce far niente bigbossman's Avatar
    Join Date
    Dec 2004
    Location
    Northern CA
    Posts
    10,793
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dirtdrop
    I heard that the YST bottom brackets are junk.
    I seem to recall the someone here phoned Harris Cyclery and inquired about them, and was told Harris no longer carries the YST bottom brackets because of quality issues.
    "Love is not the dying moan of a distant violin, itís the triumphant twang of a bedspring."

    S. J. Perelman

  13. #13
    Senior Member Grand Bois's Avatar
    Join Date
    Mar 2005
    Location
    Pinole, CA, USA
    Posts
    15,359
    Mentioned
    14 Post(s)
    Tagged
    0 Thread(s)
    Why not measure that bottom bracket shell yourself?

  14. #14
    Senior Member O-Town's Avatar
    Join Date
    Feb 2006
    Location
    Saint Pete
    My Bikes
    Seven Axiom Steel, Surly LHT
    Posts
    254
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I just got out of the garrage...yep its 66mm. The frame has the original paint so it must have been an early model that didn't follow the standard?

    Are spacers a common?
    Geee that would be nice.

  15. #15
    Senior Member Grand Bois's Avatar
    Join Date
    Mar 2005
    Location
    Pinole, CA, USA
    Posts
    15,359
    Mentioned
    14 Post(s)
    Tagged
    0 Thread(s)
    Very common. A freewheel/bottom bracket spacer is what it's called. You can get it from a bikeshop or onrline from somewhere like Bike Tools Etc, if you need enough other stuff to make the shipping worth it.

  16. #16
    cab horn
    Join Date
    Jun 2004
    Location
    Toronto
    My Bikes
    1987 Bianchi Campione
    Posts
    28,295
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    In the case that you actually have an obscure type of threading on your BB, which I find highly unlikely, Sheldon Brown again comes to the rescue! His shop sells the new YST threadless bottom brackets. They are only $20 and will fit pretty much any BB shell, including those with damaged threads... http://sheldonbrown.com/harris/bottombrackets.html#yst Prepping the frame for one of these BBs requires chamfering the BB shell with a shop tool, should cost maybe $10 at a well-equipped shop. This is a great product from what I have heard.
    I'm going to have to ask, are most shops even going to carry such a specialized tool? And have the know how to use it?

    I heard that the YST bottom brackets are junk.
    What I heard too. But are there alternatives?
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  17. #17
    cyclist/gearhead/cycli... moxfyre's Avatar
    Join Date
    Oct 2004
    Location
    DC / Maryland suburbs
    My Bikes
    Homebuilt tourer/commuter, modified-beyond-recognition 1990 Trek 1100, reasonably stock 2002-ish Gary Fisher Hoo Koo E Koo
    Posts
    4,172
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by O-Town
    I just got out of the garrage...yep its 66mm. The frame has the original paint so it must have been an early model that didn't follow the standard?

    Are spacers a common?
    Spacers are very common, usually sold in 1-2 mm thickness. Did you check the diameter of the BB shell, just so you'll be SURE that it really is English threaded?
    My bikes | Linux and Python stuff | Photo gallery

    Sheldon Brown, I miss you. Thanks for the advice, ideas, humor, and infectious enthusiasm for everything bikes...

  18. #18
    Senior Member O-Town's Avatar
    Join Date
    Feb 2006
    Location
    Saint Pete
    My Bikes
    Seven Axiom Steel, Surly LHT
    Posts
    254
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I will check. Sheldon Brown sure makes it easy to check these things.

    Thanks for all the help. Looks like my LBS (that said I couldn't use a cartridge) doesn't deal with old bikes all that much.
    Geee that would be nice.

  19. #19
    Senior Member O-Town's Avatar
    Join Date
    Feb 2006
    Location
    Saint Pete
    My Bikes
    Seven Axiom Steel, Surly LHT
    Posts
    254
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Now that I'm thinking about it...

    Would you recomend I put in two 1mm spacers (one on each side) of the cartridge or one 2mm spacer on one side?
    Geee that would be nice.

  20. #20
    Senior Member Grand Bois's Avatar
    Join Date
    Mar 2005
    Location
    Pinole, CA, USA
    Posts
    15,359
    Mentioned
    14 Post(s)
    Tagged
    0 Thread(s)
    One 1mm spacer on the drive side.

  21. #21
    yes
    yes is offline
    Senior Member
    Join Date
    Feb 2006
    Posts
    675
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    If you put 1mm on the drive side, the pedals should be centered. That will mean that you will have 1mm less threads grabbing on both sides of the BB. So, I would be careful screwing them in. Don't overtorque them, b/c it will be easier to strip (slightly).

  22. #22
    Elitist Troglodyte DMF's Avatar
    Join Date
    Jun 2006
    Location
    Dallas
    My Bikes
    03 Raleigh Professional (steel)
    Posts
    6,896
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Why jump to the YST? The threads aren't an issue (as far as we know). A threaded BB that fits is a much better solution.
    Stupidity got us into this mess - why can't it get us out?

    - Will Rogers

  23. #23
    cyclist/gearhead/cycli... moxfyre's Avatar
    Join Date
    Oct 2004
    Location
    DC / Maryland suburbs
    My Bikes
    Homebuilt tourer/commuter, modified-beyond-recognition 1990 Trek 1100, reasonably stock 2002-ish Gary Fisher Hoo Koo E Koo
    Posts
    4,172
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DMF
    Why jump to the YST? The threads aren't an issue (as far as we know). A threaded BB that fits is a much better solution.
    If you read my post above, you'll see that I suggested the YST BB *only* in case the OP's bottom bracket threads truly were of a nonstandard type which wouldn't work with any modern cartridge BB.

    I expected that the BB shell was in fact English-threaded, and it seems that has turned out to be the case
    My bikes | Linux and Python stuff | Photo gallery

    Sheldon Brown, I miss you. Thanks for the advice, ideas, humor, and infectious enthusiasm for everything bikes...

Posting Permissions

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