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contact area in dropout/wheel alignment

tseniortsenior Posts: 664
edited June 2010 in MTB workshop & tech
hello (hope the photos work ok, 1st time posting them)

took charge of my new runabout (old steel giant) this evening and when giving it the once over noticed (apart from tyre wrong way round) the left rear brake pad was rubbing.

also noticed that the wheel was over to one side

DSC02743.jpg

so i undid the QR and the contact area seems alot smaller than on my newish bike, in fact if you push the wheel over to one side there is no contact with the oppsosite drop out at all

DSC02745.jpg

when you tighten the QR the stays flex in to increase the contact but should this be happening? on my other bike (alu) the wheel sits in the droppout securely before tightening the QR.

Posts

  • supersonicsupersonic Posts: 82,708 Lives Here
    You need to fix those links lol.
  • nicklousenicklouse Posts: 50,675 Lives Here
    wheel needs dishing/hub the wrong size.

    axle looks fine.

    images fixed.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • tseniortsenior Posts: 664
    thanks for that nick, i tried to search for instructions to post pics but did not come up...can u point me in the right direction? sonic just laughed at me :wink:

    re the wheels, i jiggled it around in the dropouts and got it centred (so equel area of contact in each dropout) with minimal brake rub so sounds like the hub width is a bit small.....but that was a bit of a faff....so...if i measure the distance between the inside of the dropouts thats the hub width as per

    http://sheldonbrown.com/gloss_sp-ss.html#spacing

    i think trueing or dishing a wheel is a bit beyond me at the moment, although its a skill i'd like to learn...i may experiment with (defunt) pub bike, i'll read the sheldon brown article in detail.
  • supersonicsupersonic Posts: 82,708 Lives Here
    What is your OLD [over locknut dimension] and what hub?
  • nicklousenicklouse Posts: 50,675 Lives Here
    tsenior

    look in the BR FAQs.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • tseniortsenior Posts: 664
    sonic, dug me calipers out:

    OLD = 130mm (+ 2x5mm overall axle length)

    sticker on hub says:

    Shimano STX RL
    FH-MC33 V.A.M

    Spacing = i measure 137 between dropouts but standard is 135?

    OLD is 5mm to short?
  • tseniortsenior Posts: 664
    can i just get a universal 146mm QR axle

    http://www.wiggle.co.uk/p/cycle/7/Shima ... 300006101/

    and add 2.5mm spacers behind each locknut?

    From the parktool hub overhaul guide this seems a relatively straightforward operation.
  • The RookieThe Rookie Posts: 27,804
    My old Giant was a 150mm rear axle, when putting in a 135mm wheel it looked like that.....

    Simon
    Current steed - Whyte T129, 2013 frame, mongrel Revelations, Giant dropper, Stans S1 wheelset. 12, Magura Trail Sport brakes, 1x11. 12.8Kg
  • supersonicsupersonic Posts: 82,708 Lives Here
    You can respace the hub yes - Sheldon Brown has a guide.
  • tseniortsenior Posts: 664
    nice one sonic, having read Mr Browns helpfull text i decided i could keep the current axle and stick in some spacers, which i begged of LBS.

    i dident have a cone spanner but remembered a ground down spanner in the toolbox i inherited from me dad (dont know what he used it for), this was too small but 5 mins with a file sorted it

    result: For £0.00 the wheel is now central, brake fine, only 2mm of axle in the drop outs but should be ok

    and i cleaned and regreased the cup/cone/bearings and refitted as well 8)
  • supersonicsupersonic Posts: 82,708 Lives Here
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