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Headset bearing on Planet X RT-58

Discussion in 'Bicycle Mechanics and Repairs' started by JaAnTr, 29 Oct 2016.

  1. JaAnTr

    JaAnTr Active Member


    Today I took my forks off as the steering was becoming incredibly stiff. I had an absolute nightmare getting the headset bearing off, it took being hit probably over 100 times before it finally came off. Once I cleaned and regreased everything I assumed it would go back on easily but it's just won't budge. I can only assume that it's somehow shrunk because it is incredibly tight and I don't have anyway to hit it back on.

    So I'm looking to buy a new one but have no idea what to buy or what size. Is it just something like this - http://www.wiggle.co.uk/cane-creek-headset-bearing/

    And how will I know if it fits?

  2. T.M.H.N.E.T

    T.M.H.N.E.T Disc brakes - Stopping things since 1902

    Northern Ireland
    Degrease it and the sizes should be etched on the bearings.
  3. Yellow Saddle

    Yellow Saddle Veteran

    Loch side.
    I also won't budge if you hit me 100 times.

    What part of the headset was struck? Where was it struck and what part has now deformed?
  4. sackville d

    sackville d Über Member

  5. huggy

    huggy Senior Member

    I worked through this problem last night for my Roubaix, there seems to be an incredible number of variations in sizes even within on size like 1 5/8". In the end used a digital calliper to measure the internal, out diameters and the thickness then found the bearing from these guys. Watch is there an chamfer on the external or internal faces? http://www.edgesportsuk.com/store/components.html?cat=32
  6. Roger

    Roger Veteran

    Near Milton Keynes
    When I received my RT58 the build sheet had the headset specification they had used on it, I had trouble finding a compatible one with correct angles and ended up purchaseing same one from Planet X.
  7. OP

    JaAnTr Active Member

    meta lon and sackville d like this.
  8. sackville d

    sackville d Über Member

    I`ve bought one too but in the light of what @Roger posted I`ll be checking bearing contact angles and what not.