Bicycle Mechanics - Squeaking in BB and crank area
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02-21-05, 10:54 PM
My bike has developed a squeak on the down stroke of the right crank. The problem seems to go away when I press against the crank near the pivot and give it a pedal, is that a sign of something loose in the system? Please help, this is driving me nuts!
02-22-05, 06:27 AM
it could be loads of things best thing to do if you have the tools is strip it down and sligtly grease the system re torque the whole bolt system bb and all
I had the same problem. Turned out that the frame was flexing, and it got solved by greasing the seat post (it was a long seat post).
02-22-05, 04:20 PM
leoh, I took out the seatpost and it still squeaked when I cranked the pedals :(.
prophetbike, my cranks are connected to the BB with an 8mm allen screw, I tried using the 8mm key on my multi-tool but that didn't provide enough leverage, do you recommend getting a crank puller like this (http://www.mec.ca/Products/product_detail.jsp?FOLDER%3C%3Efolder_id=670309&PRODUCT%3C%3Eprd_id=740027&bmUID=1109110837234) or should I get a allen key with more leverage like this (http://www.bbbparts.com/products/accessories/tools/btl13.htm)? Thanks.
03-11-05, 01:40 PM
I have the same noise...what type of grease would you recommend?
03-11-05, 03:52 PM
Any grease would do. For example http://shop.store.yahoo.com/penncyclebuy/552-010.html
03-11-05, 06:34 PM
those tools are both different, and, neither will do anything on their own. removing your bolt will not remove your crank (no matter how hard you pull), and obviously, pulling your crank with the bolt inserted is not going to do anything but destroy your threads and make your crank a permanent fixture on your BB.
Now, for the squeak. this is often attributed to your BB being misadjusted. sometimes it's the chainring bolts. whatever you do, DON'T TIGHTEN YOUR CRANK BOLTS!. this will just lead to them becoming impossible to remove. i would say, remove your cranks, clean and do not grease the tapered spindle, and remove the BB. clean all the threads and use a little loctite blue 242 on the BB threads. also, clean up your chainrings and check the bolts for proper tightness. some loctite on teh chainring bolts never hurts, as i find mine loosen up often without it. hopefully that fixes the problem. if not, well, you knwo what isn't squeaking. i hate squeaking noisy stuff, uggh!!
03-11-05, 09:27 PM
This idea is probably too non-technical, but you might try lubricating the pedal-cleat contact surfaces. My road SPDs squeak like crazy after a few rides. BTW -- is there a better lube than WD40 for this?
03-11-05, 10:17 PM
Wd40 is not ... a lube...
03-11-05, 10:22 PM
There are many things that can cause squeeks and creaks when you pedal. Start with a systematic look at the various potential causes. Go to: http://www.parktool.com/repair_help/creaking_and_squeaking.shtml for starters.
I had similar problems that drove me nuts for months. I finally found that it was a very slightly loose pedal that when tightened, solved the problem. I checked them before, but must have overlooked it and went on to other things to tighten.
Check cleats, pedals, bottom bracket, chainrings, chain, derailleurs, seatpost, handlebars for starters. This is a start on a complete list of these things to check. Good luck!
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