Originally Posted by rms13
I'm always glad when I can provide some entertainment. the reason I got inspired to do that was to try to get rid of the creaking sound when I pedal. tightened the crank arms so I'm guessing it's the bottom bracket.
Creaking can be anything. Could be it was because the chain was too tight, but that's just a matter of adjusting it properly (ie, half inch of slack). If the creak's still there, oil the poor chain. If it's still there, make sure you bolts holding the chainring to the crank spider are tight. When that doesn't work, see if you've got some play in the crank arms - leaning over the bike, pull and push on both cranks simultaneously - just pulling the bolts tight won't fix this if you've worn the spline and a crank is jammed slightly off centre.
Thing is, although you need to do all this, the creak is probably somewhere else. Saddles are notorious - with Brooks it's compulsory (but of chain oil under the adjusting nut fixes that one). Seat posts can creak, as can head sets if not adjusted properly or tight. Just about anything on a bike can creak, including some things that aren't supposed to like frame tubes ... when a crack is developing or other such imminent disaster. More often than not though, the source of the creak will be the last thing you think of and it will be either simple to fix or ridiculously difficult. What it is NOT going to be, is your bottom bracket, despite that being a popular place to point fingers (cue a dozen people all telling us how their bottom bracket was making all the noise).
Basically, your bike as shown in the photo is not set up properly. Why? Because the chain is too slack. Adjust it. Oil it. Then ride it and work out what's happening. Does it creak when you pedal hard and stop when you're merely rolling the pedals over (assuming it's fixed gear, coast if it's freewheel). Does it still do it when you're standing (if not, it's the seat or seat post). Does it do it when you pull on the handlebars. Geddit? Look for the circumstance and then look for the cause.
Now we can all go back to having fun ... can't we?