Rotor 3DF chainset tight

rocksteadyeddie
rocksteadyeddie Posts: 294
edited June 2013 in Workshop
After a bit of advice chaps.

I have just bought a Rotor 3DF chainset with a Rotor Italian bottom bracket.

When fitted and correctly torqued there is significant drag when rotating the cranks. Any ideas?

Comments

  • sloppyschleckonds
    sloppyschleckonds Posts: 8,019
    How are you rotating the cranks?
    I'm sorry you don't believe in miracles
  • rocksteadyeddie
    rocksteadyeddie Posts: 294
    Backwards and forwards. Same "drag" is evident.
  • schlepcycling
    schlepcycling Posts: 1,614
    Have you over preloaded the bearings?, I have the Rotor 3D cranks and I misread the fitting instructions and was over pre-loading the bearings which was causing the cranks to be stiff when turning.
    'Hello to Jason Isaacs'
  • rocksteadyeddie
    rocksteadyeddie Posts: 294
    The preload is fully "undone" before tightening the drive side. When the drive side is tightened it's not possible to move the pre-load by hand at all.
  • dgunthor
    dgunthor Posts: 644
    does your frame need 'facing' to ensure the crank axle runs straight in the bearings?
  • thespanishadam
    thespanishadam Posts: 341
    I've got exactly the same issue with mine.

    Had bottom bracket off, re-greased... A bit better, still has a drag to it. I'm hoping it may ease in with time.

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