Question about Shimano XTR FDM970 Front Derailleur

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I have the new 2 x 10 groupo and when in the smallest cog and the small ring then chain rubs on the bottom loop of the front deraileur. My hight is set to shimanos specs. I'm wondering if there is anyway to solve this issue or is that just the way it was designed. Thanks Martin

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The system was not designed to have rub.

If your chain is too long, there can be enough slack to rest on the front derailleur. Also may want to make sure you have the B-tension screw set correctly on the rear derailleur.

If you still getting rubbing, swing the bike by your local bike shop to have them take a look (thats free) and make sure you installed everything correctly. it's very difficult to diagnose properly without seeing a picture or the actual system.

Posted on Mar 25, 2011

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When in the smallest cogs at the rear (the last two) and the smallest front ring the chain rubs against the bottom of the rear mech where the pulley wheels are. How do I adjust please. Campag...


Don't use that combination. Really. It is unnecessary as it duplicates a straighter chainline combination and it's also possible that your rear derailleur can't **** up all the slack chain when using small gears front and back.


Read this:

http://www.active.com/mountainbiking/Articles/_Cross_chaining___a_real_don_t_for_a_properly_functioning_bike.htm

http://www.sheldonbrown.com/gears.html

Jun 02, 2011 | Campagnolo Cycling

1 Answer

Cannot get rear derailer to work properly 24 inch girls evolution


Don't start messing with the derailleur yet! Make sure your shifting trouble isn't due to something else, such as a warped, dirty, or stretched chain, gummed-up pulleys, crud in the cable housing, trapped cable, or a bent derailleur hanger
Clean the chain and the rear derailleur pulleys. Pull the chain away from each pulley, and turn the pulley to make sure it can move freely. A pulley that offers resistance to turning must be replaced.
Now check the cable to be sure it slides freely. Mud and grit within the cable housing, or on a cable-guide, can keep the derailleur from moving a "full gear" during downshifts. If the cable doesn't slide freely in the housing, you may be able to clean or lube it to restore smooth shifting.
Let the high-gear limit screw. In your highest gear on the shifter, and with the chain on the smallest cog, position the derailleur so the upper pulley exactly matches the teeth of the small cog. Run the chain a bit with the front derailleur in the large ring, adjusting the limit screw until the pulley and the cog seem to match perfectly.

Setting the high-gear (small cog) limiting screw.



Once you're sure the derailleur matches the cog, move it just a whisker (1/8 to 1/4 turn) towards the other cogs. (You may need to readjust a bit if you get chain-skip.)

Closeup of setting the limiting screw.



Now adjust the low-gear limit screw. Shift into the lowest gear (largest cog). If it won't go, loosen the limit screw. With the chain on the largest cog (and the front derailleur in the small chainring), adjust the derailleur so the upper pulley exactly matches the teeth of the large cog.Once it's perfect, turn the limit screw so it moves the derailleur a tiny amount towards the other cogs (1/8 to 1/4 turn usually works).

Setting the low-gear (largest cog) limiting screw.



Now shift to the highest gear (smallest cog). Push the shift lever to downshift one gear (go from the smallest cog to the next-smallest). If it doesn't shift, tighten the cable with the barrel adjuster, 1/2 turn counter-clockwise. Backshift and try again. Continue tightening until it shifts. If it overshifts, going from the smallest cog to the third-smallest, loosen the cable by turning 1/2 turn clockwise. Backshift and repeat until it shifts exactly from the small to the next-smallest cog.

Fine adjustment of tension in the derailleur cable.





Now go to the second-smallest ring. Tighten or loosen the cable slightly, until the outer side plates of the chain are just clearing the third-smallest cog. Shift up and down, fine-tuning until you're satisfied.

Checking the position of the chain on the cogs.





Mar 04, 2011 | Pacific International Pacific Evolution 24...

1 Answer

While changing rear tire, my deraileur came off. The chain seems to be snarled up. I don't know how to ge the deraileur back on correctly. Thanks for your help.


With the wheel off remove the two pins which locate the guide wheels on the deraileur. Take off the guide wheels and the guide plate. Now straighten the chain and unwind the snarled area. Locate the chain around the smallest cog wheel on the back wheel and mount the wheel to the bike. The chain will hang slack. Now mount the upper guide wheel and guide plate to the deraileur making sure that the chain feeds off the rear cog and passes around the guide wheel towards the front of the bike. Push the deraileur forwards relative to the chain and slip the lower guide wheel in between the guide plates and pushing the chain back in the guides & fasten with the pin. As you reassemble the plates and wheels on the deraileur be sure to observe carefully which way the chain is running. It is quite logical and this should prevent mistakes being made

Oct 03, 2010 | Mongoose Exile 26 Men's Full-Suspension...

1 Answer

Colnago C50 with 11 speed choras group set. When changing up to the big chain ring ready to decend whilst still in one of the largest 2 or 3 rear sprockets the chain...


Is the chain falling off to the outside? if it is you can adjust the "High " limit screw on front derailleur. There are two screws on top of derailleur usaully marked with a L or a H.Shift rear to small cog and front on large ring. Slowly turn screw marked H till you see front derailleur move in. When it starts to rub on chain back off 1/8 of a turn. Run the rear up and down a cuople of gears making sure nothing rubs and adjust accordingly . Same with the front. That should do it! Also when changing to the big ring up front you should try to be on a middle to small cog on the rear so you don't get into a "cross chain" situation. When running on the small ring you should be on large to middle on the back. Hope that helps you out.

Sep 13, 2010 | Colnago Freeship Ferrari Cx-20 Bicycle...

2 Answers

Deraileur adjustment/tuning


Yeah you will run into that at some bike shops. When they see older components like that, they often refuse to adjust them for fear of breakage and liability. Try a different bike shop if you can, or if you are confident in your mechanical abilities, try it yourself, instructions here:
http://www.ehow.com/how_6086607_adjust-shimano-rear-derailleur.html

Good luck.

Mar 27, 2010 | Shimano Xtr Mountain Bike Dual Control...

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

2 Answers

On my bike with shimano ultegra shifters and 105 front deraileur, I can't shift onto the big chainring. The deraileur is not at the stop, but I can't move it any farther. How do I fix that.


Try this first:
Shift into the little ring and release the cable. Pull it tight (with pliers) and re-tighten the cable. It should shift now. If it doesn't, the solution is a little time consuming, so i apologize in advance.
First, flip your bike onto the bars and saddle. Now shift into the small chainring and your lowest cassette cog (the largest in number of teeth). Release the cable from the front derailleur and set the adjustment knob for the front derailleur to its center point. You should find it on your down tube. Now adjust the "L" setting on the derailleur while turning the crank so that its stop sets it in a position where it just skims the chain but does not touch it. Now pull the cable taut and re-clamp the cable. Shift into the middle ring and shift the rear derailleur to its highest and lowest gears, making sure the chain does not rub the front derailleur. If it does rub (it will be in either the lowest or highest cog on the cassette), adjust the front derailleur by way of the adjustment knob to clear the rub. Then shift into the big ring and you should have no problem. Set the "H" stop if necessary.

Jun 23, 2009 | Shimano 105 Triple Braze On Front...

2 Answers

Gears slip


I am a salesman from www.joyguy.com We mainly trade flashlight and other electronics. Feel free to contact us if you ar einterested in it, thanks.

Apr 19, 2009 | Schwinn Mesa Gs Mountain Bike

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