UK and Europe · Public discussion

New cranks for single chainring

Started by Ian Blake · · Last activity · 3 posts · 873 views

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UK and Europe
Published
27 September 2005
Last activity
28 September 2005
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Ian Blake
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  1. A few years ago I had Miche Primato Pista cranks on my bike however
    the LH crank snapped across the pedal socket.

    Yesterday I was on my way to work when exactly the same failure occurs
    with my replacement cranks. TA Alize Piste.

    Now my local bike shop is unable to get either of the above cranks.
    LBS no longer deals with Miche importer. TA no longer make single
    chainring cranks.

    I notice that Stronglight do four cranks aimed at Rohloff setups like
    mine. Does anybody know about these. Is the Stronglight Mygal or
    Stronglight Impact a better choice of crank? What other cranks should
    I look at?

    Oh and please don't mention mail order or your local shop I support
    my local shop as far as sensible.

    Thanks.

  2. Ian Blake' NoNotMe@NotAnywhere said:

    A few years ago I had Miche Primato Pista cranks on my bike
    however the LH crank snapped across the pedal socket.

    Quoted message said:

    Yesterday I was on my way to work when exactly the same failure
    occurs with my replacement cranks. TA Alize Piste.

    Quoted message said:

    Now my local bike shop is unable to get either of the above cranks.
    LBS no longer deals with Miche importer. TA no longer make
    single chainring cranks.

    There's no need to use cranks designed for use with a single ring. The
    Rohloff hub wants a chainline of 54mm, which corresponds to a single ring
    in the outer position of a typical MTB triple.

    The Alizé Piste RH crank differed from the road model only in that the
    locating lugs for the inner chainring were machined flat. The LH cranks
    were identical.

    I was able to order a single Zephyr LH crank not long ago via the UK
    distributor RJChicken. The Zephyr LH was identical to the older model of
    Alizé. The newer Alizé had the square taper orientation rotated by 45
    degrees, among other changes.

    Quoted message said:

    I notice that Stronglight do four cranks aimed at Rohloff setups
    like mine. Does anybody know about these. Is the Stronglight
    Mygal or Stronglight Impact a better choice of crank? What other
    cranks should I look at?

    The Impact is essentially a rebadged Sugino Fuse/XD - good value for money,
    medium quality, but the tread is quite wide. I have a Speedlight Piste,
    which is similar to the Mygal. It's very attractive and light, but doesn't
    give the impression of being as robust as the TA. The arm is slimmer, and
    there's less metal around the pedal eye.

    One general drawback of the Stronglight cranks in their "Rohloff" category
    is that the use of a chainguard in the outer position means that either the
    chainline is compromised, or the bottom bracket axle must be longer than
    ideal. You're not obliged to keep the chainguard, of course.

    My Rohloff bike has Alizé Piste cranks - the older model with the fifth
    arm of the spider hidden behind the crank. In your position I'd try to
    obtain a replacement left crank. Failing that, I'd be looking for an older
    forged design - something conservative like an early '90s Shimano 600 or
    XT.

    Quoted message said:

    Oh and please don't mention mail order or your local shop I support
    my local shop as far as sensible.

    In that case, why not get your advice from them? At least they'll be au
    fait with what they're able to obtain.

    James Thomson

  3. On Tue, 27 Sep 2005 18:25:42 +0200, "James Thomson"
    <[email hidden]> wrote:

    Thanks for the reply James.

    Quoted message said:
    Quoted message said:

    Now my local bike shop is unable to get either of the above cranks.
    LBS no longer deals with Miche importer. TA no longer make
    single chainring cranks.

    I was wrong. Alize Piste is discontinued. I think TA make single
    chain ring spiders for Vega and Carmina cranks.

    Quoted message said:


    There's no need to use cranks designed for use with a single ring. The
    Rohloff hub wants a chainline of 54mm, which corresponds to a single ring
    in the outer position of a typical MTB triple.

    True but it is neater to use single chain ring cranks.

    Quoted message said:


    The Alizé Piste RH crank differed from the road model only in that the
    locating lugs for the inner chainring were machined flat. The LH cranks
    were identical.

    I was able to order a single Zephyr LH crank not long ago via the UK
    distributor RJChicken. The Zephyr LH was identical to the older model of
    Alizé. The newer Alizé had the square taper orientation rotated by 45
    degrees, among other changes.

    Yes I know. I bought a replacement Alize LH crank previously when I
    stupidly contrived to strip the pedal thread (lesson learned, do them
    up tight). I had a spare Zephyr crank which I would of used then, but
    for the rotation.

    Chickens told my LBS about TA's cessation of Alize production.

    Quoted message said:


    Quoted message said:

    I notice that Stronglight do four cranks aimed at Rohloff setups
    like mine. Does anybody know about these. Is the Stronglight
    Mygal or Stronglight Impact a better choice of crank? What other
    cranks should I look at?

    The Impact is essentially a rebadged Sugino Fuse/XD - good value for money,
    medium quality, but the tread is quite wide. I have a Speedlight Piste,
    which is similar to the Mygal. It's very attractive and light, but doesn't
    give the impression of being as robust as the TA. The arm is slimmer, and
    there's less metal around the pedal eye.

    The distributor for my LBS could only supply Impact so I decided
    against Stronglight.

    Quoted message said:


    One general drawback of the Stronglight cranks in their "Rohloff" category
    is that the use of a chainguard in the outer position means that either the
    chainline is compromised, or the bottom bracket axle must be longer than
    ideal. You're not obliged to keep the chainguard, of course.

    Thankyou for pointing out the chainline issue.

    Quoted message said:


    My Rohloff bike has Alizé Piste cranks - the older model with the fifth
    arm of the spider hidden behind the crank. In your position I'd try to
    obtain a replacement left crank. Failing that, I'd be looking for an older
    forged design - something conservative like an early '90s Shimano 600 or
    XT.

    Quoted message said:

    Oh and please don't mention mail order or your local shop I support
    my local shop as far as sensible.

    In that case, why not get your advice from them? At least they'll be au
    fait with what they're able to obtain.

    I am talking to them. Unfortunately it is a small shop that does not
    sell many single ring cranks at the TA quality level. The shop's
    standard response for a good quality crank set TA. Steve told me
    that they could get some cheap stuff and some high end track stuff
    (Dura ace / Record £Eeek!!) which he did not think I would want. He
    also suggested the low cost alternative of a Suntour LH crank if I
    didn't mind the mismatched cosmetic difference. This apparently had
    the wonky taper hole.

    I have asked the shop to see if they can get TA Carmina in a single
    chainring configuration. Either single spider or Double Spider with
    chain guard (Same chainline drawback as Stronglight). Whatever would
    work.

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