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Upgrade a Lemond Poprad

Started by JJ · · Last activity · 7 posts · 555 views

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Cycling Equipment
Published
1 March 2005
Last activity
10 March 2005
Original author
JJ
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7
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  1. I have a Lemond Poprad coming sight unseen. I want to convert it into a pure
    touring bike with a triple, a 32 or 34 cog in the back and also add brifters
    to replace the bar end shifters. Currently, it is a 9-speed 12-25 with
    doubles up front with the Sora dr package. What do I have to do/buy for the
    drivetrain to make this a "world tourer" able to leap tall buildings (or at
    least get over anything short of the Alp d'Huez) loaded down with panniers
    and a not-so-light rider (225 lbs)?

  2. Well I have done something like this for a customer once before.
    For him I used a Shimano XT SGS R der. because of the necessary chain
    wrap capacity. Beyond that I installed an XT Cassette for the customer.
    If you want to ride a significant amount I would probably recommend an
    upgrade on your other component if the balance of your parts is Sora.
    Sora is designed for light recreational road riding. I have seen
    commuting customers of mine that purchased bikes equipped with Sora
    come back to me after a year of hard riding with the pieces just
    sloppy.
    So as a final list this is what I would get if I were going to make
    this into a great tourer.
    Shifters: Shimano Ultegra (105 if cash is a problem)
    R Der: Shimano XT SGS (this is the long cage version)
    F der: Shimano 105
    Cassette: Shim XT ( there isn't much cost diff. between XT and LX)
    Chain: you will have to replace your chain as yours will not be long
    enough. For my customer I had to add a link or two to even a new chain
    if my memory serves me right. But I am a big fan of the Sram PC-69
    chain.
    Crank: TruVativ is doing some good things with their cranksets I would
    look into that as they are a little cheaper but of similar quality
    specifically the chainrings themselves.

    Josh McClure.
    Durst Cycles

  3. Josh, thanks so much for these details. The bike should be here next week
    and I'll see what I've got to work with. I'm pretty sure it's Sora equipped
    so I'll go the Deore XT route for the r der, they seem pretty reasonable in
    price.

    Any problem with the BB or with clearance going from two to three rings?

    "Josh McClure" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Well I have done something like this for a customer once before.
    For him I used a Shimano XT SGS R der. because of the necessary chain
    wrap capacity. Beyond that I installed an XT Cassette for the customer.
    If you want to ride a significant amount I would probably recommend an
    upgrade on your other component if the balance of your parts is Sora.
    Sora is designed for light recreational road riding. I have seen
    commuting customers of mine that purchased bikes equipped with Sora
    come back to me after a year of hard riding with the pieces just
    sloppy.
    So as a final list this is what I would get if I were going to make
    this into a great tourer.
    Shifters: Shimano Ultegra (105 if cash is a problem)
    R Der: Shimano XT SGS (this is the long cage version)
    F der: Shimano 105
    Cassette: Shim XT ( there isn't much cost diff. between XT and LX)
    Chain: you will have to replace your chain as yours will not be long
    enough. For my customer I had to add a link or two to even a new chain
    if my memory serves me right. But I am a big fan of the Sram PC-69
    chain.
    Crank: TruVativ is doing some good things with their cranksets I would
    look into that as they are a little cheaper but of similar quality
    specifically the chainrings themselves.

    Josh McClure.
    Durst Cycles

  4. If the bike currently has only a double, which would make sense if it
    was a cyclocross bike, then there are more than a few things that have
    to be changed to make it into a 3 ring bike. the first and biggest is
    obviously a new crank, unless they send you a crank that has the holes
    for a third ring. If you do have to replace the crank you will also
    have to replace the BB. Also if the bike is a double the F der will be
    for a double as well. so that will have to be changed. And once again
    you will need to replace the R der.

    An inportant note on this change is you have to be certain that the
    chainwrap will not exceed the rear derailler's capacities and the width
    of the front deraileur capacity

    All Shimano Front Deraillers have a listed capacity of 22T although the
    new 10sp stuff must have a listing of 23t because there is a 53-39-30
    set. That being said, I have installed a 24t differential (52-40-28)
    without problem.

    Front derailer width is calculated by (largest chainring - smallest
    chainring)

    As Rear deraileurs go,
    all SGS model Deraillers above Deore have a listed capacity of 43
    (XTR,XT and LX have a capacity of 45)
    all GS model Derailers have a listed capacity of 37
    and all SS model derailers have a listed capacity of 29

    These figures like those of the F Der can be safely exceeded by 1 or 2
    links

    Chain wrap capacity can be calculated (Largest (front) chainring -
    smallest (front) chainring) + (largest (rear) cog - smallest (rear)
    cog) = chainwrap.

    So just do you calculations before you purchase anything and Have fun
    riding.

    Josh McClure

  5. Bike arrived and is in pretty good shape. I will need to replace the front
    rim which is a 700c Mavic Aurora 32 hole. I haven't found a duplicate rim,
    wheel or wheelset and wondering what would be similar. What would be good
    (and preferably cheap as I'll probably have to get a pair) to either handle
    a touring configuration or take the rigors of cyclocross. The Aurora's are
    double walled and look to have fairly beefy spokes.

    "JJ" <[email hidden]> wrote in message
    news:natVd.65641$Dc.35342@trnddc06...

    Quoted message said:

    Josh, thanks so much for these details. The bike should be here next week
    and I'll see what I've got to work with. I'm pretty sure it's Sora
    equipped so I'll go the Deore XT route for the r der, they seem pretty
    reasonable in price.

    Any problem with the BB or with clearance going from two to three rings?

    "Josh McClure" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:

    Well I have done something like this for a customer once before.
    For him I used a Shimano XT SGS R der. because of the necessary chain
    wrap capacity. Beyond that I installed an XT Cassette for the customer.
    If you want to ride a significant amount I would probably recommend an
    upgrade on your other component if the balance of your parts is Sora.
    Sora is designed for light recreational road riding. I have seen
    commuting customers of mine that purchased bikes equipped with Sora
    come back to me after a year of hard riding with the pieces just
    sloppy.
    So as a final list this is what I would get if I were going to make
    this into a great tourer.
    Shifters: Shimano Ultegra (105 if cash is a problem)
    R Der: Shimano XT SGS (this is the long cage version)
    F der: Shimano 105
    Cassette: Shim XT ( there isn't much cost diff. between XT and LX)
    Chain: you will have to replace your chain as yours will not be long
    enough. For my customer I had to add a link or two to even a new chain
    if my memory serves me right. But I am a big fan of the Sram PC-69
    chain.
    Crank: TruVativ is doing some good things with their cranksets I would
    look into that as they are a little cheaper but of similar quality
    specifically the chainrings themselves.

    Josh McClure.
    Durst Cycles

  6. JJ said:

    Bike arrived and is in pretty good shape. I will need to replace the front
    rim which is a 700c Mavic Aurora 32 hole. I haven't found a duplicate rim,
    wheel or wheelset and wondering what would be similar. What would be good
    (and preferably cheap as I'll probably have to get a pair) to either handle
    a touring configuration or take the rigors of cyclocross. The Aurora's are
    double walled and look to have fairly beefy spokes.

    Would another Matrix Aurora work? I think they are still available
    through Trek dealers.

  7. "dianne_1234" <[email hidden]> wrote in message
    news:[email hidden]...

    Quoted message said:
    JJ said:

    Bike arrived and is in pretty good shape. I will need to replace the front
    rim which is a 700c Mavic Aurora 32 hole. I haven't found a duplicate rim,
    wheel or wheelset and wondering what would be similar. What would be good
    (and preferably cheap as I'll probably have to get a pair) to either
    handle
    a touring configuration or take the rigors of cyclocross. The Aurora's are
    double walled and look to have fairly beefy spokes.

    Would another Matrix Aurora work? I think they are still available
    through Trek dealers.

    I was looking for something used with no success, but good idea, I'll price
    some out if they're still available. Thanks!

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