Question about Campagnolo Chorus 10 Speed Short Cage Rear Derailleur Campy

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I would like advice on adjusting the rear derailleurs on my Campag Record long cage set. I am very much an amateur, and am not sure which screw/nut to turn and by how much. Thank you.

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Ok...there are usually 2 screws,one above the other.The top screw normally adjusts the deraileur so that the deraileur does not touch the spokes.the bottom screw usually adjusts the derailer so that it does not go past the smallest sprocket.One way to adjust eg(incase you have clicking sounds as you pedal) is to put the deraileur into the smallest sprocket at the back end.Flip the bike upside down so it sits on the seat and handlebars.Now get right behind the deraileur and see if the deraileur is in line with the smallest sprocket.If it is not in line,then slowly pedal the bike and adjust the screw inwards until you hear no more clicking.If you cannot get into the smallest sprocket,then,turn the screw outwards while still turning the pedals.The deraileur will slowly move outwards until it jumps into the small sprocket and no clicking sound .Vice versa for the top screw.good luck.let me no how you get on

Posted on Nov 17, 2010

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I have fitted a campag 13-29 cassetteBut now when out of the saddle my chain clicks,do i need to change my rear derailleur size.It is currently a short cage.


Hmm, only out of the saddle? What gear(s)? If only the 29 I'd say the equivalent of the "B-screw" needs adjustment first but if all gears click you probably just have a mismatch between aged chain and new gear teeth.

http://www.parktool.com/blog/repair-help/rear-derailler-adjustments-derailleur

http://www.parktool.com/blog/repair-help/categories/chain-repair-and-service

Aug 24, 2011 | Cycling

1 Answer

I have a SRAM 3.0 rear derailer. It is difficult going into the two largest gears, I have a 7 speed cassette. I notice there is no barrel adjustment on it. Any suggestions


The barrel is for fine tuning the indexing among the gears. Limit screws set the inner and outer physical swing of the derailleur.

A simple web search for "Sram 3.0 Mountain Bike Rear Derailleur adjustment" finds the manual.

http://www.sram.com/_media/techdocs/RD_X0_X9_X7_5_4_3_QS_03.PDF

There IS a barrel adjuster.

http://www.parktool.com/blog/repair-help/rear-derailler-adjustments-derailleur

Aug 10, 2011 | Sram 3.0 Mountain Bike Rear Derailleur -...

1 Answer

Campag Chorus medium cage rear mech with 13 - 29 cassette


That's a 16-tooth spread in the rear. The cage can handle 36 teeth of chain length change including the front. That means your highest and lowest chainrings should be within 20 teeth of each other, but I avoid those issues by being careful to find a straighter chain line than anything near a cross-chain, typically not venturing more than one cog past the center opposite the chainring I use. That way I can actually use a shorter chain, too.

http://parktool.com/repair/readhowto.asp?id=64

Read up on the B-screw adjustment

Jun 07, 2010 | Campagnolo Chorus 10 Speed Short Cage Rear...

1 Answer

Campagnolo Record 10 sp. short cage rear drlr.+ 13-26 cassette


You don't say if this happens in the BIG ring, small ring or both. If it's just the big ring I'd suspect there isn't enough chain length.

Cross chaining is unnecessary and bad for your drivetrain. I never go more than one cog past the center of my cassette opposite the chainring I use.

http://www.parktool.com/repair/readhowto.asp?id=26

May 02, 2010 | Campagnolo Record 10 Rear Derailleur

1 Answer

My shimno sora front derailler shifts perfectly to the small and large chain set cogs, but on the middle, the chain rubs along the cage.


Set the rear derailleur to the lowest gear (big cog) and the front to the lowest gear (small chain ring). Disconnect the derailleur cable. Screw in the adjuster for the cable tension all the way (this adjuster is on the shifter of a mountain bike or the down tube of a road bike). Pedal to make sure the chain is not rubbing on the derailleur cage. If it is, adjust the "L" setting on the derailleur until the chain moves by without touching the cage. Now pull taut and reattch the cable and shift the front to the big ring while pedaling. If it does not shift up well or completely, hold the shifter past its normal shift and adjust the "H" screw so that the derailleur allows the shift. Shift into the highest cassette gear and keep pedaling. The chain should not be touching the front derailleur's cage when you pedal. Adjust with the barrel adjuster until the chain moves freely without touching the derailleur cage.

i hope this helps
-matthew

Oct 30, 2009 | Cycling

1 Answer

Problem with chain and gears


Wash, degrease and scrub the chain and derailleurs with a good degreaser (like Simple Green). Dry the chain and relubricate it with an appropriate bike chain lubricant (not oil or WD-40). Shift the derailleurs to the smallest chain ring and cog on the cassette (low front gear, high rear gear) and then loosen the cable at the derailleurs, pull the cables taut and reattach them. If the derailleurs still need adjustment, here is a procedure for it:
Flip the bike over (so you can pedal the bike manually while you shift) and shift the front to the middle chain ring. Shift the rear to the highest gear (small cog). Release the cable from the pinch bolt on the derailleur. Adjust the screw marked "H" on the derailleur until the jockey wheel on the derailleur is aligned perfectly over the small cassette cog. Set the cable adjuster on the derailleur to the middle of its range (find this by screwing it all the way in and then count how many revolutions it makes until it screws out completely. Screw it back in one half of the total revolutions). Reattach the cable and shift to the lowest gear (the biggest cog). Over-shift and hold on the shifter, then adjust the "L" screw on the derailleur until the jockey wheel sits just past the last cog. You have to hold the shifter to do this. Now shift into the middle gear (or one of the two middle gears if the bike has an even number of gears) and adjust the derailleur using the barrel adjuster you previously set to the middle of its range. Adjust it so that the derailleur is sitting perfectly over the appropriate gear. Shift up and down the cassette while pedaling and in every gear, reverse pedal (freewheel) to make sure the chain does not hop. Adjust as necessary until all gears are smooth.
Now the front:
Set the rear derailleur to the lowest gear (big cog) and the front to the lowest gear (small chain ring). Disconnect the derailleur cable. Screw in the adjuster for the cable tension all the way (this adjuster is on the shifter of a mountain bike or the down tube of a road bike). Pedal to make sure the chain is not rubbing on the derailleur cage. If it is, adjust the "L" setting on the derailleur until the chain moves by without touching the cage. Now pull taut and reattch the cable and shift the front to the big ring while pedaling. If it does not shift up well or completely, hold the shifter past its normal shift and adjust the "H" screw so that the derailleur allows the shift. Shift into the highest cassette gear and keep pedaling. The chain should not be touching the front derailleur's cage when you pedal. Adjust with the barrel adjuster until the chain moves freely without touching the derailleur cage.
That should be it, unless there is another mechanical problem causing the missed shifts, like a bent derailleur hanger or damaged teeth on the cassette cogs or a bad derailleur. If it is still problematic, come back for further information.

i hope this helps
-matthew

Oct 26, 2009 | Cycling

1 Answer

Throwing chain too far on an upshift up and off


The "H" screw is the one that is letting your chain jump of f of the ring. If the screws are not labeled, the way to distinguish the two is to shift the front as high as it can go and hold it there manually. Screw either adjusting screw in. If you are screwing the correct one, it either will not move at all or move only very slightly.
First thing is first: flip your bike over onto the bars and saddle. The best method to adjust these settings is to shift into your small ring and let loose the shifter cable. Now shift your rear derailleur into the lowest gear and manually pedal the bike while adjusting the "L" screw on the front until the derailleur cage allows relatively free rotation of the chain. Now set the barrel adjuster on your down tube fully turned in (clockwise). Pull the cable taut and reattach at the derailleur. Shift into your middle ring (or high ring if you have a double-ring crank) and then shift the rear to the highest gear. Use the barrel adjuster to get the derailleur cage to just clear the chain while cranking. If you have already succesfully set your "H" screw to a point where the chain no longer jumps off, then you are all set here. If not, hold the front shifter in while cranking and set the stop so the chain cannot get off of the big ring, but far enough out so you can purposely over-shift by just a bit. Sometimes if you shift early, that little bit of over-shift is very helpful.

i hope this helped, but if you would like to see pictures of this happening, go to parktool.com/repair and check out their tips on derailleur adjustment.
matthew

Oct 22, 2009 | Campagnolo Record Front Derailleur

1 Answer

I'm trying to adjust the shimano gearing on my trek bike and am having a little trouble


Front or rear? What is it doing?
Flip the bike over onto the handlebars and saddle and let us fix it.
Here is how to adjust the rear (first):
-Set your front gear to its middle position.
-Shift the rear into the highest gear.
-Disconnect the derailleur cable.
-Screw the barrel adjuster on the shifter (or down tube if it is a road bike) to fully turned in clockwise.
Screw the barrel adjuster on the rear derailleur to its halfway point.
-On the back of the rear derailleur you will see two screws. One will be marked "H" and the other "L". These mean high and low. Adjust high to get your jockey wheel on your derailleur perfectly centered over the smallest cog on the cassette. Manually shift by pushing the derailleur (while cranking the pedals) to the largest cog (1st gear) and set this stop on the derailleur "L" where the jockey wheel is over the cog, but past it where it would be touching the outside of the cog if they were side-by-side.
-Pull the derailleur cable taut and re-tighten it.
Shift the rear to the middle gear and adjust the derailleur using the barrel adjuster to center the jockey wheel directly over the cog it should be.
-Now shift up and down the cassette, cranking as you go and in every gear, back-pedal to make sure there is no problem with the gears hopping. If they do, adjust as necessary with the barrel adjuster.
Here are some tips for the front:
-Shift into low gear on the front and rear derailleurs. Make sure the chain is not rubbing on the front derailleur. If it is, adjust the screw marked "L" until the chain just clears the derailleur but does not touch it.
-Pull the derailleur cable taut and re-tighten it.
-Now shift the front into the middle gear and while it is still in the low gear in the back, crank to make sure the chain is not rubbing on the front derailleur. If it does, adjust the tension of the cable with its barrel adjuster.
-Shift the front into high gear and shift the rear to the highest gear, cranking as you shift. If the chain is not rubbing, you are all set.

Sep 02, 2009 | Cycling

3 Answers

Wont change gears 12or3


There should be one or two limiting screws for the front derailleur that you can use to adjust how far out/in the derailleur moves to shift the chain over. You can ask a friend to lift the back end of the bike off the ground while you do the adjusting of these screws and then try shifting the gear while moving the peddles with your other hand.

Aug 21, 2009 | Huffy Womens Mountain Bike - Passion...

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