Derailuer problems

[Pain Freak]

This past weekend as we were riding I found that everytime I applied a lot of pressure to the pedals, it would skip and a few times almost caused a crash. It's impossible to stand on the pedals. When I put it in the stand and try to duplicate it, it doesn't happen as I can't apply the force needed to simulate myself standing or mashing on the pedals. I've moved the barrel adjust almost all the way from all the way in, to all the way out and still I experience this problem. It seems like a simple adjustment but without being able to have it happen in the stand, I just can't dial it in. Any suggestions?

[CalEpic]

Did you check that the cable housing is not binding the cable?

C

[doublewide]

check chainrings,casette,and chain. when applying force and those things are worn it will skip, causing racking of the goods. D'oh!

[Collette]

Originally Posted by Pain Freak

This past weekend as we were riding I found that everytime I applied a lot of pressure to the pedals, it would skip and a few times almost caused a crash. It's impossible to stand on the pedals. When I put it in the stand and try to duplicate it, it doesn't happen as I can't apply the force needed to simulate myself standing or mashing on the pedals. I've moved the barrel adjust almost all the way from all the way in, to all the way out and still I experience this problem. It seems like a simple adjustment but without being able to have it happen in the stand, I just can't dial it in. Any suggestions?

I had this problem too a while back, a slightly bent hanger was the culprit. The wrench at my shop didn't even tell me to buy a new one, He simply bent it back, and it's been smooth running ever since.

[genusmtbkr5]

Originally Posted by doublewide

check chainrings,casette,and chain. when applying force and those things are worn it will skip, causing racking of the goods. D'oh!

Originally Posted by Wildcat

I had this problem too a while back, a slightly bent hanger was the culprit. The wrench at my shop didn't even tell me to buy a new one, He simply bent it back, and it's been smooth running ever since.

I'ts usually a sign of worn cassette/chain/chainring(s). I had that same problem before the CC/VQ, it was a worn cassette, middle chain ring and chain. I would check that hanger first as Wildcat stated, also be sure your derailleur isn't bent. If everthing checks out, then it is the chain rings, cassette, and chain as Doublewide stated. I've replaced all rings, cassette and chain since and my bike shifts like butta and I can torque down on it going up anything, even some of those climbs on The Main Divide during the CC/VQ. Good luck!

[LoisMustDie]

It is probably a bent hanger, but check your chain. Often times when a chain is about to break it will start skipping.

[2wheel_lee]

Ya see, that's why ya ride a singlespeed!

If possible, try to identify if the chain is skipping (jumping over the gear) or derailling to another gear. Have someone watch when it happens. It could also be a bad freewheel.

It could be a number of things, such as frame flex, misaligned derailleur (bent hanger/adjustment), worn cassette/chain.

Also, what hub do you have?

[dstepper]

Could be that you just thrashed your bike on National, that trail has a bad habit of eating bikes.

It was not skipping before AZ trip, replaced derailleur and now it skips. I would question if the derailleur hanger was straight. But it sounds like worn cassett and chain, maybe new derailluer does not have as much tension.

[Pain Freak]

Sorry should have mentioned I put on a new derailuer,chain,and hanger, they all got thrashed on National. The rings are less then a year old, in fact the whole bike is just barely a year old and I've already dumped another 800 bucks into it. This mtb'ing is really getting expensive. I haven't put 500 bucks into my road bike in 4 years and I've got over 20,000 miles on it.

[dubjay]

Originally Posted by Pain Freak

Sorry should have mentioned I put on a new derailuer,chain,and hanger, they all got thrashed on National. The rings are less then a year old, in fact the whole bike is just barely a year old and I've already dumped another 800 bucks into it. This mtb'ing is really getting expensive. I haven't put 500 bucks into my road bike in 4 years and I've got over 20,000 miles on it.

More than likely, you got some wear in your chainrings or cassette (or both!). Under torque, the chain isn't meshing well with one or the other, and as a result, it's slipping off.

[Edog]

Throw your bike on the stand, take a real good look at your drive train componants, if you find the word 'Shimano' on anything, don't panic. Carefully remove the item & dispose of it properly. Replace with items brandishing the words SRAM on them!
Now you'll find things smooth & happy, feel free to mash away

[Pain Freak]

Originally Posted by Edog

Throw your bike on the stand, take a real good look at your drive train componants, if you find the word 'Shimano' on anything, don't panic. Carefully remove the item & dispose of it properly. Replace with items brandishing the words SRAM on them!
Now you'll find things smooth & happy, feel free to mash away

Not a shitmano part on my bike! 100%SRAM

[cru jones]

My guess would be a bent hanger. Happened to me on a two-month old bike i was riding. Also check that your outer chainring isnt bent. That could also cause some skipping issues.

[dirttorpeedo]

MR FREAK! why you didnt use the bat fone and call direct is be ond my comprehenshun.the new chain wont werk with the old cogs.my bill is in the male....then agian you ..... shooda known.

[gurp13]

Hold on, let me get this straight. You put a new chain on worn cassette? And, don't give this year old crap. You put hard miles on your bikes, brother. Even I know that if you replace the chain you're gonna have to replace the cassette and chainrings.

Or, I read that someplace. Sheldon Brown?

Or, I could just f*** off now.

Anyway, I'm going to side with the dirty wrench and say that your new chain ain't playing well with your worn cassette.

[Waldo]

Originally Posted by LoisMustDie

It is probably a bent hanger, but check your chain. Often times when a chain is about to break it will start skipping.

Ya think? I can't imagine where you'd get that impression...

[ka0t1c07]

Damn Mike, your road bike gets more miles on it than my road car. LOL. Mike, have you tried lubing the chain. I seen it happen to two bikes and the lube solved the problem.

[Pain Freak]

Brand new chain and hanger, but I'll check the cassette again. Looking back on my ride log (mostly for the road rides) I don't see more then 1700 miles on this cassette.

.

Just seen jensons has the same casette for 57 bucks, that's worth it to change it.

[CalEpic]

I just ordered the SRAM PG990 from Price Point. I ordered the '05 for less money and they shipped me an '06 (at the '05 price) I don't remember exactly, but I think it was $45

If it was me, I'd replace the chainrings or at least the middle, the chain and cassette all at the same time.

Don't forget to check the cables. I've had bad housing on a couple occassions cause the same problems. It drove me crazy trying to adjust.

C

[genusmtbkr5]

Originally Posted by CalEpic

I just ordered the SRAM PG990 from Price Point. I ordered the '05 for less money and they shipped me an '06 (at the '05 price) I don't remember exactly, but I think it was $45
C

Hey Pain, are you talking about a SRAM PG970 for $57.00 at Jensens? Because if you are, Performance has it for $34.99. But $45 for a PG990, you can't beat that price anywhere