Knocking noises from crank area.

foy
Posts: 296
I purchased a trek mountain bike off ebay and the bike is in as new condition, i keep getting knocking noises from the crankset area of the bike when pedalling. I have checked the crankset for tightness and all is ok, i have also checked the seatpost for tightness and pedals and greased both of them, also checked the front and rear quick release on the wheels and these are fine. I only get these noises when pedalling and they come and go and are not there all the time. I would be most grateful for any help or advice
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Comments
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What crankset?
In fact what bike?I don't do smileys.
There is no secret ingredient - Kung Fu Panda
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Trek 3700 mountain bike 2009 model, suntour crankset.0
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Happened to me with a Trek 4300. The left crank arm was loose and had worn. I kept tightening it up but to no avail so fitted a new crank arm. problem solved until I upgraded to SLX. Might be worth checking out.You may be too old to rock but never too old to roll.0
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That would be my first guess as well.I don't do smileys.
There is no secret ingredient - Kung Fu Panda
London Calling on Facebook
Parktools0