Danny00135 Posted June 23, 2013 Report Share Posted June 23, 2013 Sooo guys.. The BB on my fixie is always gradually shifting to the right.. The right cup unscrews and the left goes through the inside. What I don't understand, is, why the hell it is shifting to the right? O.o Surely the clockwise crank rotation would force the drive side cup to tighten, not loosen? Anyone know what sorcery this is? Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted June 23, 2013 Report Share Posted June 23, 2013 (edited) i dont know whats it called in english but in my way to translate it it would be "circulating torque" its a force that applies when an axle is supported by bearings and theyre threaded into something,when you pedal the force goes opposite to the rotation,unscrewing your bb.its like the balls of the bearing were planets in a gear hub,they turn the direction around hence the paradoxon of having backwards facing threads with bsa bb. loctite it in with medium loctite edit: sorry that its german Edited June 23, 2013 by FamilyBiker Quote Link to comment Share on other sites More sharing options...
Danny00135 Posted June 23, 2013 Author Report Share Posted June 23, 2013 Ahh, that makes sense, I learned something today, thanks for the help, much appreciated Quote Link to comment Share on other sites More sharing options...
Mark W Posted June 24, 2013 Report Share Posted June 24, 2013 Precession, yo! 1 Quote Link to comment Share on other sites More sharing options...
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