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Chain Problems. PLEASE HELP!!!!!!!(9 posts)

Chain Problems. PLEASE HELP!!!!!!!stinkfoot247
Apr 28, 2003 8:57 PM
AAAAHHHHHH. This is my 3rd post about chains, sorry guys, some day I will learn your grandkids on this forum. Here is the many problems. When I am running my smallest two sprockets (39 front, 12 back) there is alot of slack in the chain, so much that the chain drags on front deraillure. I have 112 chain links And I got that number from my old chain, and had mother and sister count it for me cuz I forgot the chain at mothers house. I don't know if it makes a difference in calculating the # of links but from my BB and rear axle measures 16in. When I run it on the two biggest sprockets (53front, 23 back) there is room for the rear deraillure to stretch more. I was considering taking out 4 links.
I would like to know what difference chain tension has on shifting or any other properties.
Taking previous into consideration I have another problem.
I can adjust my deraillure so it works fine when I run through the whole cassette while working with 53chain ring up front, but when I shift to the 39chain ring every thing is out of wack, I havn't yet but I'm sure that when I do make those adjustments the 53 will be out of wack, cuz that's how messed up it is. Now I'm wandering could this have to do with the lack of chain tension. Here are the other factors which may influence your advice. I just installed a durace 9 speed chain on 9 speed system. I did not replace any chainrings or the cassette. My system ran great before I installed new chain. Thank you wrenchers so much. BTW dura Ace chains are a &%$@$%%^ when removing rivets. Bent my damn tool. I just wanna ride my bike, it's been a week. Boo hoo. :'(
All you should help poor kid above ^nm.stinkfoot247
Apr 28, 2003 9:02 PM
re: Chain Problems. PLEASE HELP!!!!!!!Spunout
Apr 29, 2003 3:50 AM
A) Don't run the two smallest sprockets in the 39

B) Shorten the chain two links

C) Re-Boot your system: Start over with your adjustments

D) Sell it all and go Campy ;-)
re: Chain Problems. PLEASE HELP!!!!!!!BIGBOB
Apr 29, 2003 3:58 AM
Try going with the chain in the big chainring and shifting to the big cog on your cassette. This is the extreme range of your shifting. Now stretch the chain tight and add two links to that measurement which should give just enough tension. Should work fine.
I learned that from the opposite end...joekm
Apr 29, 2003 5:02 AM
I.E. go the the small chain wheel and smallest cog and set your chain based upon that. I also use a section of bent coat hangar wire to hold then ends of the chain so there is enough slack to get the master pin in place.

BTW - what everyone else is saying is correct. You should try to stay out of your smallest two cogs when your on the small chain wheel and out of your largest two cogs when your in the big chain wheel. If your drivetrain is well adjusted, you should be able to shift there, it's just not good for your chain/ drivetrain.
Yes, Campy says small/small...BIGBOB
Apr 29, 2003 6:13 AM
and then take a measurement the dimension of which I forget. I was assuming Shimano since its more the "norm", I'm pretty sure they say big/big+2 on thier instructions.

Could be wrong, would'nt be the first time. Bob
re: Chain Problems. PLEASE HELP!!!!!!!stinkfoot247
Apr 29, 2003 8:39 AM
By stetch tight do you mean stretch until deraillure doesn't move?
When setting up the chain lengthTrekFurthur
Apr 29, 2003 11:13 AM
Don't run it through the rear de., just lay it across and wrap it around the big cog/big chainring, then add two links and break it. Then, run the chain through the rear derailleur, onto the cogset and, leaving the other side OFF the chainring (so the rear de. doesn't keep trying to pull the chain out of your hand/chain tool) reattach the pin. Seat chain onto chainring and then set the derraileurs.

Did I miss anything anyone?
Didn't anybody ever tell you the 2 rules of road bikes?Alexx
Apr 29, 2003 4:50 AM
Rule #1: NEVER use the small/small combo.
Rule #2: NEVER use the big/big combo.