UK and Europe · Public discussion

Re: Bars & Stems

Started by Simon Brooke · · Last activity · 3 posts · 614 views

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UK and Europe
Published
14 December 2004
Last activity
14 December 2004
Original author
Simon Brooke
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3
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  1. in message <[email hidden]>, igp

    (') said:


    Hi All,
    I'm in the process of changing my flat bar road bike into a drop bar
    bike and need a little advice. I've recently bought a used set of
    shimano sora combined shifters for the job and would like to change
    them over myself. A few questions that I need answered before I buy
    anything else are

    1. Existing bars are 25.4mm must the new drops be exaxtly 25.4mm.

    Err... no. Drop bars are a different standard diameter to straight bars,
    for some arcane reason. I think the thick bit in the centre where the
    stem grips is the same, but to be honest I'm not really sure of this.
    You may need to use a shim.

    Quoted message said:

    2. Existing stem is 90mm from centre of riser to centre of bars is
    this an appropriate length for drop bars.

    Depends how big you are. However, if it works with straights, it's
    likely to be there or thereabouts with drops. You _might_ need a
    shorter one.

    Quoted message said:

    3. Bar width Is there an easy way to determine correct width.

    The metric usually given is 'the width of your shoulders'. Wider may be
    better if you do a lot of climbing.

    Quoted message said:

    4. What type of bar tape is recommended.

    I like leather best but it's hard to come by these days. Cork is good.

    Quoted message said:

    5. I'm pressuming that I will need new cables.

    Probably.

    Quoted message said:

    Any other advice would also be much appreciated

    If anyone else give you different advice from the above, take it. I'm
    still half asleep.

    --
    [email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/

    ;; Usenet: like distance learning without the learning.

  2. Simon Brooke said:
    Quoted message said:

    1. Existing bars are 25.4mm must the new drops be exaxtly 25.4mm.

    Err... no. Drop bars are a different standard diameter to straight
    bars, for some arcane reason. I think the thick bit in the centre
    where the stem grips is the same, but to be honest I'm not really
    sure of this.

    They used to be the same, and some cheap or unusual drop bars are still
    25.4 mm at the central collar/bulge, but most drops available in the UK
    are at least 25.8 now. Most 3T and ITM non-"oversized" are 25.8, Cinelli,
    Deda and most others are 26.0. The oversize ones are much larger still
    and definitely need a matching stem.

    ~PB

  3. Pete Biggs said:
    Simon Brooke said:
    Quoted message said:

    1. Existing bars are 25.4mm must the new drops be exaxtly 25.4mm.

    Err... no. Drop bars are a different standard diameter to straight
    bars, for some arcane reason. I think the thick bit in the centre
    where the stem grips is the same, but to be honest I'm not really
    sure of this.

    They used to be the same, and some cheap or unusual drop bars are still
    25.4 mm at the central collar/bulge, but most drops available in the UK
    are at least 25.8 now. Most 3T and ITM non-"oversized" are 25.8,

    I may be wrong but I think the bog standard ITM Europas come as
    25.4mm[1]. Having said this, when I swapped over straight bars for
    drops I went for the Ahead adapter option and used a front loading
    Ahead stem (25.4) and a lovely pair of 3T Formas (25.8). This settup
    lasted me well for a couple of years

    I go for narrower bars my self (42cm centre - centre)

    JT
    [1] I have just looked a few online suppliers and non had the
    measurement specified :-(

    Remove the singers of Spam before replying

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