By Slacker (Sudbury, Ontario) on Feb 27, 2010
Comments: Hey all, I had the thumping/squeeking too! But I spent 3 hrs taking it apart and putting it together again...turned out to be a bloody bolt/nut on the round peice underneith the place where you put your foot. (Lift up foot petal and there are 2 bolts) It seems to loosen over time. Thank god I found it or my neighbor below me would have killed me!