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  1. #1
    my nice bike is at home kraftwerk's Avatar
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    Just another person in search of elusive BB size

    Hey All,
    I am currently building up an old Merlin MTN bike, Everything about this project is unconventional because either how I am setting it up, (seven speed w/ ridgid threadless fork) or because this frame is so damn outdated (we are talking early 90,s here.. ancient history, perhaps you remember the Clinton admistration? Or when 'Dirt Rag' was simply B&W?)
    So, I am looking for a BB with a shell thread of 68 and a tapered spindle leangth of 135 or so. The cranks will be single chainring upfront and seven speed rear freewheel. The cranks have to clear the 112mm of chainstay width, these chainstays are bulky hence the long spindle. All the spindles I have laying about are too narrow.
    So Who still makes it? Shimano? and where can I buy it? some of you brainiacs were very helpfull in my search for a threadless 1" head set, so Thanks to that!
    Will post photo's when this project is done. It is gonna be "special"
    Thanks to all comments,
    Jt

  2. #2
    Lost in the Black Hills mx_599's Avatar
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    Quote Originally Posted by kraftwerk
    Hey All,
    I am currently building up an old Merlin MTN bike, Everything about this project is unconventional because either how I am setting it up, (seven speed w/ ridgid threadless fork) or because this frame is so damn outdated (we are talking early 90,s here.. ancient history, perhaps you remember the Clinton admistration? Or when 'Dirt Rag' was simply B&W?)
    So, I am looking for a BB with a shell thread of 68 and a tapered spindle leangth of 135 or so. The cranks will be single chainring upfront and seven speed rear freewheel. The cranks have to clear the 112mm of chainstay width, these chainstays are bulky hence the long spindle. All the spindles I have laying about are too narrow.
    So Who still makes it? Shimano? and where can I buy it? some of you brainiacs were very helpfull in my search for a threadless 1" head set, so Thanks to that!
    Will post photo's when this project is done. It is gonna be "special"
    Thanks to all comments,
    Jt
    ummm....i don't think this will really help you out, but i thought i'd throw it out there for your general knowledge and others. i realized this too late. i needed a wide ISIS spindle for my build due to wide chainstays as well. i had wanted to use external cupped bearings, but no dice due to the width.

    i forgot about Echo products (for trials). they make some sweet BB in wide sizes...external to boot! i do not see why they wouldn't (oops, double neg.) work for most forms of riding, trials riding is pretty harsh on BB's so i figured why not. i would have bought one of these but i ordered a fsa that will suffice.
    http://www.echobike.com/index1.htm

    Last edited by mx_599; 07-10-06 at 02:23 PM.

  3. #3
    Lost in the Black Hills mx_599's Avatar
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    Quote Originally Posted by kraftwerk
    So, I am looking for a BB with a shell thread of 68 and a tapered spindle leangth of 135 or so. The cranks will be single chainring upfront and seven speed rear freewheel. The cranks have to clear the 112mm of chainstay width, these chainstays are bulky hence the long spindle. All the spindles I have laying about are too narrow.
    Jt
    why 135mm to clear 112mm??

  4. #4
    Lost in the Black Hills mx_599's Avatar
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    - Maintenance-free sealed cartridge assembly with extra seal keeps out dirt, mud, and water.
    - Also allows installation without adjustment.
    - Offset axle (to the drive side) to ensure maximum clearance for front freewheel users.
    - Ideal choice for trials riders using square taper cranks due to its solid axle, good price, and relatively low weight.
    - Steel cups for maximum durability.
    - Includes crank bolts.
    - 122.5mm or 127.5mm axle length with 68mm shell available, to fit a variety of setups.
    - Weight 310g.


    - Maintenance-free sealed cartridge assembly with extra seal keeps out dirt, mud, and water.
    - Also allows installation without adjustment.
    - Ideal choice for trials riders using square taper cranks due to its solid axle, good price, and relatively low weight.
    - Steel cups for maximum durability.
    - 127.5mm or 119mm axle length with 68mm shell available, to fit a variety of setups.
    - Includes a pair of steel crank bolts.
    - Weight 310g.

    http://82.110.105.16/tartybikes.co.uk/news.php
    (watch out, the site is addicting...you might become a trials rider if you stay there too long)

  5. #5
    Lost in the Black Hills mx_599's Avatar
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    what's wrong with a shimano square 68/122 i found at universalcycles?

    https://www.universalcycles.com/shop...3&category=347

  6. #6
    my nice bike is at home kraftwerk's Avatar
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    Hmmm that 127.5 might be worth a try, I think it could work. Yeah, I hafta clear 111/112 with the inside of the crank arms... they Bulge out in that area for some long forgotten reason.
    This Merlin was the state-of-the-art frame in it's day, I am sure it was adorned with quality componentry at one time...
    thanks for all the replies "mx_599".
    j

  7. #7
    Lost in the Black Hills mx_599's Avatar
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    Quote Originally Posted by kraftwerk
    Hmmm that 127.5 might be worth a try, I think it could work. Yeah, I hafta clear 111/112 with the inside of the crank arms... they Bulge out in that area for some long forgotten reason.
    This Merlin was the state-of-the-art frame in it's day, I am sure it was adorned with quality componentry at one time...
    thanks for all the replies "mx_599".
    j
    no problem. you might be able to order from here if it will be a better deal than overseas. even if it is not on his website, i believe he can still get it. so i don't know what will be easier...UK or USA.

    1-716-627-2676
    www.TRIALSIN.com
    tim@TRIALSIN.com
    4402 Stratford Terrace, Hamburg, NY 14075
    Monday-Friday 10-6

  8. #8
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    What kind of cranks are you using?

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