Question about Mountain Trek Fisher Bike Derailleur Hanger, Fuel, Lemond 6

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The derailer front and rear move only two cogs

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Take your bike to a Trek Dealer, you can cause more damage if it is loose or too tight. You have a good bike, don't skimp and have someone "fix" it that really does not know what they are doing. I've seen many that the owner's buddy "fixed" and it always means more work and more expensive because we have to undo the damage first

Posted on Sep 10, 2010

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1 Answer

I have an electric RMartin R10H, and replaced the 9c motor hub. But, the derailed is no longer aligned. Cog needs to be moved outward by 3/8 inch or so. Is such an extender available?


Are adjustment screws all the way out? If so, frame won't accommodate this cog. ITs too wide. Sometimes a frame spreader will correct. This repair is difficult to do, contact local bike shop for assistance

Oct 05, 2014 | Shimano RD-M 310 DL Alivio/Acera/Altus...

1 Answer

How many sprockets are on derailer of 18 speed next


If you're talking about the Next mountain bike, I believe the rear cluster has six cogs. Three up front times six in the back equals eighteen.

Dec 23, 2013 | Schwinn Sport Cruiser Women's Cruiser Bike

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

Good evening - I have Shimano Alivio Gears on my Cannondale F6 MTB and the gears are trying to change down a gear on the rear cogs (go to the larger cog) and need adjusting - which screw is the one to...


Neither screw is for mis-shifts. Those are limit screws for the largest and smallest cogs. Tweaking the cable tension will usually bring in the indexing...

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

It sounds like your cable is/was a smidge too tight.

Aug 14, 2010 | Mountain Shimano Alivio Front Bike...

1 Answer

Sticky chain


That is packing grease.......PB blaster or WD-40 spray will take care of your prob.

Mar 11, 2010 | Cycling

1 Answer

Moves to a smaller rear cog by it self


Possibly the right one, but I doubt it.

Load-induced upshifting is usually due to the indexing adjustment being off due to normal expected cable stretch over time.

You might need to adjust the tension of the rear derailleur cable. Get a bead on how the gear selected and the two derailleur pulleys line up as viewed from directly behind. They should all be in the same vertical plane. If the pulleys are slightly outboard of the selected gear you can expect random upshifting to the next highre gear (smaller cog).

Turn the barrel adjuster at the derailleur about 1/4 turn CCW as viewed from behind the bike. This will make the cable a small bit tighter and you should see the pulleys move inboard to be better aligned with the selected cog. Try riding it and see if it gets a little better, then try another 1/4 turn. Don't go overboard with it though.

Jan 31, 2010 | Shimano Deore Xt Thumb Shifters 7...

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

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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