Bicycle Mechanics - Chain Rubbing on Crank..HOW TO FIX
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08-18-06, 01:26 AM
WHen I am in the larger chain ring, the outer "chain ring" protector or crank whatever it is called is bent, therefore it pushes on the chain, and it hits the derailers and moves up a bit, how to solve it? Can I lay my bike on the ground and use a hammer and straighten it out?...I wish I could just cut that piece out because it would solve problems, but it is metal? how do I fix this?
08-18-06, 06:37 AM
grab the bent in part with pliers or vise grips and bend it. dont use a hammer. you should be able to tell if its metal or not. flick it. does it sound like metal? if its an old bike, it prbally is, if its recent, ie 8 years or less, its plastic.
So Cal commuter
08-18-06, 10:20 PM
take it off.(can you?)
08-19-06, 09:02 AM
Sound's like that thing Schwinn (and others) used on the large ring to keep the chain from jumping off even if the FD is out of adjustment. Mine was held on by some bolts that went into the chain ring - if you are referring to this, just take out the bolts. The protector ring will slide right off over your pedals. You could straighten and reinstall it or just leave it off - but make sure your FD is properly adjusted or you'll drop your chain when shifting from small to large.
This sounds like an older bike (I could be wrong), but losing a chain can be a pain as you have to dismount and use your hands (or a stick or something) to put it back on. Newer bikes are designed so that the chain doesn't hang up on bolts used to attach the outer chain ring.
When I re-did my old Schwinn, I took that ring off and also the metal ring that prevents the chain from shifting over the inner cog. I learned the hard way what it's like to have the chain lodge between the spokes and the frame when you're 5 miles out - a real bummer.
After I got the RD adjustment correct, I had no more problems. I hated that protector - it always squeaked and creaked against the spokes.
Have since replaced the steel rims with more modern 27" wheels - and, now, have a totally new bike so hardly ride my trusty old Schwinn anymore at all.
Good luck. Good riding.
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