Fitting brakes to front fork - bolt length

Discussion in 'Bicycle Mechanics and Repairs' started by KneesUp, 10 Nov 2016.

  1. KneesUp

    KneesUp Veteran

    I splashed out on a new fork from Planet X (and when I say 'splashed out' I mean 'bought the one in the colour they are selling cheap') for a frame I've had sat in the shed for a while.

    While the frame has been gathering cobwebs I've been picking up other bits for it, so I've been putting it all roughly together this week.

    Anyway, when I put the front caliper on the fork, which being carbon is quite fat at the crown, I can only tighten the allen-head-nut thing half a turn, which does not feel like anything like enough thread to keep it all together when I have to slam the brakes on. The picture is intended to show the size of the bolt compared to the crown. There is a recess in the fork so the allen-key-nut thing does sit inside the fork, but I can still only get half a turn before it's tight.


    I have concluded I need a longer allen-key-nut thing, but if I google of that not much useful comes up. Can someone tell me the proper name for the loose bit shown below please?

  2. Tim Hall

    Tim Hall Guest

    Front brake recessed nut. Getting that colour might be tricky though.
    KneesUp likes this.
  3. OP

    KneesUp Veteran

    Thanks @Tim Hall - I notice it's one of those items that's priced at "people who want one really need one" levels. £4 for a nut! :smile:
  4. raleighnut

    raleighnut Guru

    On 3 Wheels
    They normally come with the brake caliper but a decent bike shop should stock them, they certainly can be 30mm overall length cos I've got one that long in my spares stash.
  5. Venod

    Venod Eh up

  6. S-Express

    S-Express Guest

    'sleeve nut' is the name you are looking for..
  7. OP

    KneesUp Veteran

    Thanks all - I'm off today so I'll see what the LBS has in.
  8. OP

    KneesUp Veteran

    Early closing at the LBS on Thursday it seems. Bugger!
  9. Globalti

    Globalti Legendary Member

    It's a pity you don't live near me in Lancashire because I've got a couple of longer ones in my box of bits that I would swop for a glass of beer.
    KneesUp and raleighnut like this.
  10. midlife

    midlife Guru

    SJS do them as well


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