Headset cups

bennett_346
bennett_346 Posts: 5,029
edited October 2012 in MTB workshop & tech
Out of curoscity, why do headset cups have to be pressed in, why can't they screw in like BB cups?

Just a thought.

Comments

  • The Rookie
    The Rookie Posts: 27,812
    Some BBs have caught up and are now pressed in.....

    You need a thread somewhere for preload, headsets used the steered, BBs the shell as doing it in the axle would be pretty much impossible on cottered axles.
    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.
  • nicklouse
    nicklouse Posts: 50,675
    bennett_346 wrote:
    Out of curoscity, why do headset cups have to be pressed in, why can't they screw in like BB cups?

    Just a thought.
    why do BB cups even need to be threaded?

    it just adds cost.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • bennett_346
    bennett_346 Posts: 5,029
    Just a bit easier to fit than press fitting.
  • cooldad
    cooldad Posts: 32,599
    nicklouse wrote:
    bennett_346 wrote:
    Out of curoscity, why do headset cups have to be pressed in, why can't they screw in like BB cups?

    Just a thought.
    why do BB cups even need to be threaded?

    it just adds cost.
    Throwback to when BB's were a unit (I suppose many still are) or loose balls and needed to stay in place.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

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    Parktools
  • The Rookie
    The Rookie Posts: 27,812
    Throwback to cup and cone BB's, (came long before units!) and needed something threaded, BB shell easier than axle.
    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.
  • nicklouse
    nicklouse Posts: 50,675
    cooldad wrote:
    nicklouse wrote:
    bennett_346 wrote:
    Out of curoscity, why do headset cups have to be pressed in, why can't they screw in like BB cups?

    Just a thought.
    why do BB cups even need to be threaded?

    it just adds cost.
    Throwback to when BB's were a unit (I suppose many still are) or loose balls and needed to stay in place.
    nope. many lose ball have press fit cups.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • nicklouse
    nicklouse Posts: 50,675
    bennett_346 wrote:
    Just a bit easier to fit than press fitting.
    How?

    press fitting is simple and easy to remove.

    but then anything is if you have the correct tools.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • The Rookie
    The Rookie Posts: 27,812
    Like an 'ammer......sorted!
    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.

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