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What's going on with my chain when rolling my bike backwards?

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What's going on with my chain when rolling my bike backwards?

Old 08-30-12, 06:05 PM
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What's going on with my chain when rolling my bike backwards?

I recently went to the LBS to have my chain and other parts checked and tuned up. My gears where shifting completely awful so he adjusted the rear derailer some. Ever since he has done that the gears shift smooth and quick, but when I'm putting my bike up for storage I normally roll it in backwards and it sounds as if the chain is "clicking"(not the good click) and looks like it is almost jumping around. I've been trying to do all of my repairs by myself as home and learning as much as I can on here.

Has he over adjusted the rear derailer?? It's not a huge issue because the bike works properly, but little stuff like this bothers me. Thanks for any help.
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Old 08-30-12, 06:53 PM
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Have you considered it may be under adjusted?
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Old 08-30-12, 07:09 PM
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Originally Posted by chaadster
Have you considered it may be under adjusted?
I honestly have no idea. I've learned quite a bit about everything EXCEPT gearing(obviously the most important) =p. Is there a Road Bike Maintenance book for dummies? I'd really like to learn this stuff for myself.
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Old 08-30-12, 07:19 PM
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Originally Posted by DevinL
I honestly have no idea. I've learned quite a bit about everything EXCEPT gearing(obviously the most important) =p. Is there a Road Bike Maintenance book for dummies? I'd really like to learn this stuff for myself.
Park Tool website, Park Tool Blue Book and the Zinn Art of Bicycle Maintenance. Or if you have tons of money you can order the Barnett Institute DVD (probably rule out the "for idiots" part on that)
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Old 08-30-12, 07:20 PM
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Thanks, Mike!
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Old 08-30-12, 08:08 PM
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My chain started doing that just before it crapped out and broke. How old is the chain? Do the links look distorted or worn? How many miles? It may be time for a new chain. If the bike is several years old and has a bunch of miles on it I'd replace it. Even just for peace of mind. I went from a mid level SRAM chain to a Dura-Ace chain. It made a very big difference in how the bike works. Quite a bit more solid. Better shifting, and smoother running. And it's quieter. If you are making noise while riding I'd replace it.

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Old 08-30-12, 08:16 PM
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One other thing to consider. My bike was shifting fine but when I pedalled backwards or rolled the bike backwards I had noise and some chain suck. Turned out that it was the bearings in the rim. My LBS told me that I might have created the problem by spraying too much degreaser in my cassette while cleaning my drivetrain. He said it likely seeped into the bearings and destroyed their lubrication.
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Old 08-30-12, 08:17 PM
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Don't roll your bike backwards, or pedal backwards if you are even partially cross chained because the chainring & rear cog is not lined up. It has nothing to do with adjustments.
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Old 08-30-12, 08:22 PM
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Similar but different- When I'm in my big/small combo (for me that's 50/12) and stop pedaling suddenly or rotate the pedals backwards to set my legs up for a corner, I notice a weird grinding and jump to the chain that doesn't occur in any other combos. I've adjusted the limit screws properly, I'm just thinking it must have something to do with the nature of being slightly cross-chained in that combination on a 10sp cassette...
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Old 08-30-12, 09:39 PM
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Well, Im a dumb. Upon further notice I found this to be the issue. It's catching the front rail. I'm assuming I can easily adjust this outwards.

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Old 08-30-12, 09:47 PM
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Seem like to me, you'd notice that going forward too.
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Old 08-30-12, 10:02 PM
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Originally Posted by DevinL
Well, Im a dumb. Upon further notice I found this to be the issue. It's catching the front rail. I'm assuming I can easily adjust this outwards.

Is that in the trim position? (IS there a trim position for a Rival FD?)
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Old 08-30-12, 10:30 PM
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Force & Red have trim, not sure about rival. That's in the shifters though, hard to say what shifters he has.

Does the chain rub when you're moving the pedals in the correct directoin? If not, I'd leave well enough alone. One side effect of moving the stop for the FD outward is that you can drop your chain outside the crank if you over shift. (It's easily fixed while riding, just shift down and pedal gently, but it's a PITA)
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Old 08-31-12, 08:26 AM
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The chain does not rub when going in the correct position. It just binds itself when going backwards. Very annoying and seems like it could cause some damage to the chain over time.
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Old 08-31-12, 08:37 AM
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How often do you need to go backwards ? If it rubs going backwards, I would think it also rubs going forwards. You just don't notice it.
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Old 08-31-12, 09:10 AM
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Not very often. Just after every ride I roll it backwards into it's stand for storing. It looks to me that the front has about 3mm worth of space between the chain and front derailleur. Something it causing it to bind though when going backwards. Makes no sense to me. I have no idea why he didn't adjust the front derailleur either. Maybe I'm better off and just taking it back and watch him do it.
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Old 08-31-12, 09:12 AM
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What gear are you in ?
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Old 08-31-12, 09:17 AM
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Largest up front and middle rear.
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Old 08-31-12, 09:45 AM
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Sram does trim in the large chain ring.

Devin - try riding the bike, shift down to the small chain ring then all the way back up to the large. It seems to me if the fd is rubbing and you're in the middle rear, you've probably hit the trim and didn't realize it. The fd also may be adjusted so it only shifts up into the trim position. I have done that early on in my experience with sram. I guess the question would be - does your fd trim?

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Old 08-31-12, 09:56 AM
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The chain will not hit when going the correct direction because under tension it will move inwards slightly. Just adjust the FD limit very slightly if you do want to eliminate the noise but it doesn't matter.
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Old 08-31-12, 10:04 AM
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I had the same problem, but mine would actually drop the chain pedaling backwards. I solved it by adjusting the bolt on the rear derailleur (not the limit screws). it dropped the pulleys to where they were not in the way when pedaling backwards which was my problem.
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Old 08-31-12, 11:15 AM
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Originally Posted by arelyt
I had the same problem, but mine would actually drop the chain pedaling backwards. I solved it by adjusting the bolt on the rear derailleur (not the limit screws). it dropped the pulleys to where they were not in the way when pedaling backwards which was my problem.
That's what is refered to as the B screw adjustment. If not set properly you can bind up the rear mech pedaling backwards (which you should never really do anyways). Adjust it to spec in the manual and it will shift nice and quick.
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Old 08-31-12, 11:15 AM
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Lube your chain. Mine will get noisy when pedalled backward if I go to far between lubes.
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Old 08-31-12, 11:46 AM
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Originally Posted by NWS Alpine
That's what is refered to as the B screw adjustment. If not set properly you can bind up the rear mech pedaling backwards (which you should never really do anyways). Adjust it to spec in the manual and it will shift nice and quick.
Thank you guys so much. Fixed my problem and she's working properly now.
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Old 08-31-12, 12:13 PM
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Originally Posted by DevinL
I recently went to the LBS to have my chain and other parts checked and tuned up. My gears where shifting completely awful so he adjusted the rear derailer some. Ever since he has done that the gears shift smooth and quick, but when I'm putting my bike up for storage I normally roll it in backwards and it sounds as if the chain is "clicking"(not the good click) and looks like it is almost jumping around. I've been trying to do all of my repairs by myself as home and learning as much as I can on here.

Has he over adjusted the rear derailer?? It's not a huge issue because the bike works properly, but little stuff like this bothers me. Thanks for any help.
Why take it in? Just get your mechanic to do it while you ride. (Where's the video of the guy adjusting his own RD while riding?)

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