mountian goat Posted April 4, 2009 Report Share Posted April 4, 2009 which way does the drive side of a bottom bracket tighten up :clock wise ? (to the right)anti clock wise (to the left ) cheers lee Quote Link to comment Share on other sites More sharing options...
Mikee Posted April 4, 2009 Report Share Posted April 4, 2009 I had to look in my haynes manuel for this as I always forget , the driveside does up anti-clockwise. Quote Link to comment Share on other sites More sharing options...
mountian goat Posted April 4, 2009 Author Report Share Posted April 4, 2009 ahh ok thanks very much dude ! Quote Link to comment Share on other sites More sharing options...
Chris - Burman Posted April 4, 2009 Report Share Posted April 4, 2009 righty tighty lefty lucie Quote Link to comment Share on other sites More sharing options...
mountian goat Posted April 4, 2009 Author Report Share Posted April 4, 2009 ahh ok thanks very much dude !read the first reply ?its not always like that Quote Link to comment Share on other sites More sharing options...
sstein Posted April 4, 2009 Report Share Posted April 4, 2009 The way that I remember is that if you need to get a bb out when the bike is upside down, you turn the spanner towards the wheel (either side). Quote Link to comment Share on other sites More sharing options...
Dave! Posted April 4, 2009 Report Share Posted April 4, 2009 (edited) Would'nt it be clockwise? because as you pedal your cranks go clockwise so it would help tighten the bb...where as the other way would eventually losen it. I may be wrong, I can never remember which way it tightens. Edited April 4, 2009 by Dave! Quote Link to comment Share on other sites More sharing options...
JonMack Posted April 4, 2009 Report Share Posted April 4, 2009 No.Drive side tightens anti clockwise, non-drive tightens clockwise (standard way)However with pedals, non-drive tightens anti clockwise, and drive tightens clockwise Fun times. The way I remember pedals is always turn towards the front wheel. BB is therefore always turn towards the back wheel Quote Link to comment Share on other sites More sharing options...
Revolver Posted April 4, 2009 Report Share Posted April 4, 2009 The way that I remember is that if you need to get a bb out when the bike is upside down, you turn the spanner towards the wheel (either side).Unfortunately:A bike has two wheels, and, depending on where the spanner is, either way is towards any given wheel. Quote Link to comment Share on other sites More sharing options...
Pashley26 Posted April 4, 2009 Report Share Posted April 4, 2009 If you can't look at a thread and work out which way it turns you don't deserve to own the tools to remove/fit it.Sorry to be harsh though... Quote Link to comment Share on other sites More sharing options...
Nickkkkk Posted April 4, 2009 Report Share Posted April 4, 2009 (edited) If you can't look at a thread and work out which way it turns you don't deserve to own the tools to remove/fit it.Sorry to be harsh though...don't you work in a bike shop though? Edited April 4, 2009 by Nickkkkk Quote Link to comment Share on other sites More sharing options...
sstein Posted April 4, 2009 Report Share Posted April 4, 2009 Unfortunately:A bike has two wheels, and, depending on where the spanner is, either way is towards any given wheel.Rear wheel Quote Link to comment Share on other sites More sharing options...
Captain Scarlet Posted April 4, 2009 Report Share Posted April 4, 2009 righty tighty lefty lucie Did you not even read two posts above, that is completely irrelevant as it reverse thread.So going by that rule, righty would be loosey, and lefty would be tighty.If you can't look at a thread and work out which way it turns you don't deserve to own the tools to remove/fit it.What if its already fitted and you can't remember which way loosens...? Quote Link to comment Share on other sites More sharing options...
Ben John-Hynes Posted April 4, 2009 Report Share Posted April 4, 2009 What if its already fitted and you can't remember which way loosens...?What if the title of the thread is "Which Way Does The Drive Side Of A Bb Tighten Up" Quote Link to comment Share on other sites More sharing options...
Fish-Finger-er Posted April 4, 2009 Report Share Posted April 4, 2009 all these strange ways of remembering it, just remember it tightens in the opposite direction to the direction you pedal (or loosens in the same direction you pedal) Quote Link to comment Share on other sites More sharing options...
psycholist Posted April 5, 2009 Report Share Posted April 5, 2009 The easiest way to remember how to unscrew both pedals anad BB's is that if the bearings seize and you continue to pedal forwards, the BB and the pedals on both sides all come loose. This is not the reason they're made this way though - it's all down to torque free precession... Quote Link to comment Share on other sites More sharing options...
JT! Posted April 5, 2009 Report Share Posted April 5, 2009 So, the real question is why is the drive side of the bb reverse thread. Quote Link to comment Share on other sites More sharing options...
Fish-Finger-er Posted April 5, 2009 Report Share Posted April 5, 2009 So, the real question is why is the drive side of the bb reverse thread.So it tightens as you pedal, despite looking the opposite way, the fact that its a something rotating within a bearing, the small amount of force on the outside of the bearing will be going the opposite way to rotation. at least thats how I had it explained to me many moons ago. Quote Link to comment Share on other sites More sharing options...
mountian goat Posted April 5, 2009 Author Report Share Posted April 5, 2009 If you can't look at a thread and work out which way it turns you don't deserve to own the tools to remove/fit it.Sorry to be harsh though...na its ok never really thought about that :$ come on its the first time i have ever fitted a bottom bracket but thats no excuse for my dumness Quote Link to comment Share on other sites More sharing options...
JonMack Posted April 5, 2009 Report Share Posted April 5, 2009 If you can't look at a thread and work out which way it turns you don't deserve to own the tools to remove/fit it.What about when it's in the bike? Quote Link to comment Share on other sites More sharing options...
psycholist Posted April 6, 2009 Report Share Posted April 6, 2009 Here's a bit about the reason for the thread direction choice - http://en.wikipedia.org/wiki/Precession_(mechanical)I have a mechanical engineering final year project where a test rig was designed to measure this on my desk but haven't read it yet ... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.