tube loose on rim for conti gran prix mtb 26 x 1.1/8

bobpzero
bobpzero Posts: 1,431
edited May 2010 in MTB workshop & tech
why do the conti tour slim 26 and Schwalbe MTB 26 X 1 -1.5 are a bit loose on my mavic xc717 disc rims. any direct to the point advice would be much appreciated and reassurance

conti race 26 x 1 - 650 x 18/25c Presta 42mm be the right tube size?

Comments

  • bobpzero
    bobpzero Posts: 1,431
    just to show i attempted to use the search function
    http://www.bikeradar.com/forums/viewtopic.php?t=12570650&highlight=tubes
  • The Rookie
    The Rookie Posts: 27,812
    bobpzero wrote:
    why do the conti tour slim 26 and panracers 26 X 1 -1.5 are a bit loose on my mavic xc717 disc rims.

    Again in English?

    I'm really not at all sure what Q you are asking!

    Simon
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • bobpzero
    bobpzero Posts: 1,431
    trying to figure out what tube size is best suited to the tyre. had tried the conti tour slim 26 tubes with tyre seated on rim but the tube was crushed on at one part. i thought a 26" tube would fit snugly on a xc rim. so obviously im missing something and i struggle at asking the right questions. anyone want to translate for me?
  • bails87
    bails87 Posts: 12,998
    26" is the size of the wheel, which is standard for an MTB. There should be another number, eg 26" x 1.5-2.0" which means that the tube is suitable for tyres between 1.5 and 2 inches wide.

    So what is the width of the tubes?
    MTB/CX

    "As I said last time, it won't happen again."
  • bobpzero
    bobpzero Posts: 1,431
    Schwalbe MTB 26" X 1-1.5
    conti Tour 26 Slim, 26 x 1.1-1.3
    conti race 26, 26 x 1 - 650 x 18/25c

    crc review "would recommend conti's slim tour tubes 26x 1.18 - 1.3 though as the average tube is too large in diameter"
    mtbr review "Need to use a narrow XC rim to safely use the 1.0 size. 650c 18-25 tubes work great."
  • bails87
    bails87 Posts: 12,998
    And what tyre are you using?

    Is the tyre loose on the rim when the tube is inflated?
    MTB/CX

    "As I said last time, it won't happen again."
  • bobpzero
    bobpzero Posts: 1,431
    the conti grand prix 26"mtb tyres sit perfectly and not loose when tube is inflated on the mavic xc 717 disc rims are for 1 to 2.3
  • bails87
    bails87 Posts: 12,998
    So the tube is only loose when it's inflated without a tyre?

    That's not a problem :wink:
    MTB/CX

    "As I said last time, it won't happen again."
  • cooldad
    cooldad Posts: 32,599
    conti race 26, 26 x 1 - 650 x 18/25c

    This is not a mountain bike tyre and won't fit a 26" rim I don't think. It's for a 650c rim.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

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    Parktools
  • cooldad
    cooldad Posts: 32,599
    But still a bit confused by the question
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

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    Parktools
  • Dirtydog11
    Dirtydog11 Posts: 1,621
    I'm not 100% sure but it looks like the sizes quoted for the Conti tube are just different European standards for the same thing.

    have a look at this

    http://www.sjscycles.co.uk/article-Tyre ... t-Etro.htm

    I think the tube is suitable for is 26 * 1 British imperial and 650 * 18/25 French so should be ok.
    Kinesis Maxlight XC

    Orange 5 AM Custom
  • bobpzero
    bobpzero Posts: 1,431
    Dirtydog11 wrote:
    I think the tube is suitable for is 26 * 1 British imperial and 650 * 18/25 French so should be ok.
    thats the answer i was looking for :D
    thankyou all for your patience. yep the conti race 26" x 1, tube was the correct one. sorry i was absolutely clueless to begin with.

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