Shimano BB9000 drag

dw300
dw300 Posts: 1,642
edited July 2014 in Workshop
Just installed this with a 6800 crankset, and even before inserting the preload screw I noticed that there's significant drag on the pedals.

Im coming from a SRAM and an FSA chainset both with ceramic BBs.

Will the bearings loosen given a bit of use as theyre freshly packed with grease? Or do Shimano BBs just drag a lot?

Given a quick flick of the wrist without the chain installed i get 1.5 - 2 crank revolutions. My others would have spun round 4 - 5 times.

Thanks.
All the above is just advice .. you can do whatever the f*ck you wana do!
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Comments

  • keef66
    keef66 Posts: 13,123
    In my experience with Shimano HT2 and press-fit BBs that's normal. They do loosen up a bit but there's always some drag, presumably from the seals, which I think is a good thing.

    I'm not a good enough cyclist for the extra drag to worry me.
  • mitchgixer6
    mitchgixer6 Posts: 729
    It should spin a bit more freely once you've done a few hundred miles on it and the grease becomes thinner.
  • dw300
    dw300 Posts: 1,642
    mitchgixer6 wrote:
    It should spin a bit more freely once you've done a few hundred miles on it and the grease becomes thinner.
    keef66 wrote:
    In my experience with Shimano HT2 and press-fit BBs that's normal. They do loosen up a bit but there's always some drag, presumably from the seals, which I think is a good thing.

    I'm not a good enough cyclist for the extra drag to worry me.


    Thanks guys!
    All the above is just advice .. you can do whatever the f*ck you wana do!
    Bike Radar Strava Club
    The Northern Ireland Thread

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