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CHAIN SLIP - SHORTEN CHAIN?(6 posts)

CHAIN SLIP - SHORTEN CHAIN?MrSteve
Aug 26, 2003 12:48 PM
MY CHAIN SLIPS AND DOES NOT ENGAGE FOR A FEW PEDAL ROTATIONS AFTER SHIFTING FROM THE LARGE FRONT RING TO THE SMALLER OF THE TWO FRONT RINGS WITH THE CHAIN ON THE SMALLEST REAR COG. DO I NEED TO SHORTEN MY CHAIN?
NO, YOU NEED TO HIT THE CAPS LOCK BUTTON!!!!!the bull
Aug 26, 2003 4:04 PM
Then you might need to adjust the tension on the frt derailuer.Screw the barrel adjustment in. This will loosen tension and help to force the chain into the smaller ring.Could also be the adjustment of the frt derailuer.Check the set screws and aligment to chain rings.If your not sure take it to the LBS.This is where most people screw stuff up.
I don't think so...C-40
Aug 27, 2003 4:35 AM
First of all, you shouldn't be shifting from the big ring to the little ring while in the smallest cog. A natural progression would be to shift to larger cogs first, then if the gear is not low enough, shift to the little ring.

There is probably nothing wrong with the setup, just a dumb place to attempt a big to small chainring shift. The opposite extreme may also not work well and is also a dumb place to attempt a chainring shift.
NoKerry Irons
Aug 26, 2003 4:42 PM
First, you have to turn off your caps lock key - it makes your messages unpleasant to read. I would suggest that you measure your chain - if it has elongated more than 1/8 inch in 24 links (12 inches) then it must be replaced. It is also possible that your chainring is worn. As a general rule, you shouldn't be riding the small-small combination anyway. The derailleur should be just shy of letting the chain hang loose in the small-small combo. It may be that the front derailleur is not properly adjusted and the chain is riding up on the edge of the chain ring instead of being pulled all the way down onto the small ring. Also, if you are applying a lot of pedal pressure while shifting into this "no, no" combination, this will exacerbate the problem.
If elongated...Alexx
Aug 27, 2003 5:07 PM
...more than 1/8"?? Hell, toss the cassette, too! You're supposed to replace the chain when it's 1/16" elongated. By the time it gets to 1/8" it's probably destroyed everything else in the drivetrain.
..don't shift to small ring while in smallest cog...Spunout
Aug 27, 2003 3:36 AM
it is definitely a recipe for disaster if you look at the angles. If you were riding in big/small combo and needed to shift, shift some cogs first.