tightening up bottom bracket/wiggly cranks

Robstar24
Robstar24 Posts: 173
edited April 2010 in The workshop
Need some tips on how to tighten up my bottom bracket (at least I think that's the cause of the problem).

Currently if I hold the pedal in one hand and shake it there is noticeable wiggling of the whole crank.

Anyone got any bright ideas on how to put an end to this?

Comments

  • CarlosDSanchez
    CarlosDSanchez Posts: 455
    Is it just on one side or do both cranks move when you do this?

    If it's just on one side then the crank is probably loose. There should be a bolt or cap head screw which holds the crank to the axle. You will need to tighten that up (assuming you have a square taper bottom bracket)

    If the whole thing moves then the bearings in the bottom bracket are worn out and you need to replace it.
    Dolan Preffisio
    2010 Cube Agree SL
  • Robstar24
    Robstar24 Posts: 173
    both cranks unfortunately.... tightened them up individually but it carried on....looks like i will need to take the bike in then, thankfully it's only my commuter and I have a spare
  • nicklouse
    nicklouse Posts: 50,675
    sounds like the BB has gone or something is lose. Depends on the crank/BB system used.

    lots of info on all systems on Parktools.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown

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