[Closed] New chainrings and chain and still getting chainstuck!!

new chains are sticky, if it's longer than you need, and the springs in the rear mech are a bit tired, the new sticky chain will stick to the chainring = chainsuck.

is your new chain still new and sticky?

(and a bit too long?)

if it's a 4 bar sus design, slight play in all of the bearings under load might allow it to flex enough to stick the chain on the ring.
I've seen it on Trek and Specialized bikes over the years, particularly on frames at the the extremes of tolerance for alignment.

It's a hardtail so bearings to worry about there.

The chain has been cleaned since new so it's not sticky as such i.e. there's none of that greasy covering they have when new.

It's an XTR rear mech. I've adjusted he tension so it's as stiff as it can be. I'll double check the length though.....

had the same thing with my soul,
chronic chain suck,
new chain, new rings still the chainsuck.
noticed i had very low tension in the rear mech, itd done ~3000miles on 2bikes.
replaced the mech and was amazed at how much tension was kept in the chain - no more chainsuck..

seem to be lots of tales of chainsuck on inbreds and souls, given these are normally built with bits off existing bikes i wonder how much chainsuck is due to tired rear mech springs.

Have you swapped the jockey wheels?

BB Spacing/bb axle length?

BB Spacing/bb axle length?

I would go for soemthing like this, I fully believe that even new kit will suck and really its all about how close the chain is to the chainstay.

2nd checking jockey wheels.. I had a problem with the chain being "a bit weird.." lower jockey wheel would hardly turn when i looked into it!!

Is the freewheel working properly? My friend had chronic chainsuck when he stopped pedalling because his freewheel was sticking.

I'm surprised that changing to Deore rings didn't help? They are much less 'grabby' than XT rings in my experience. Everyone I ride with runs deore steel grannies for exactly this reason.

I've adjusted he tension so it's as stiff as it can be.

do you mean you've shortened the chain? or something else?

BB Spacing/bb axle length?

BB hasn't changed neither has anything else.
It's a Pace RC305 so there isn't much clearance but then there never has been and I haven't always been plagued with chainstuck.

The lower jockey wheel is worn but spins freely.

The deore rings may have been fine I initially took them off cos I was still getting it but even with new XT ones it's still there. Once solved I'll probably put them back on. If I ever solve it!!

Ha ha, a PACE, I had one of those and suffered the same problems. People will tell you that it's nowt to do with the frame but i've never had chain suck issues before or after. Evetually knacked the frame thru chainsuck. I see Pace now include a anti-chainsuck device on their latest hardtails.

Mackem - Member

Ha ha, a PACE, I had one of those and suffered the same problems. People will tell you that it's nowt to do with the frame but i've never had chain suck issues before or after. Evetually knacked the frame thru chainsuck. I see Pace now include a anti-chainsuck device on their latest hardtails.

You can tell exactly the same tale with on-one/ragley, Brant has got his funny chainstay plate to reduce chainsuck, it's all about the frame.

this might help?

[url= http://www.bikerumor.com/2010/09/03/tomac-k-edge-release-most-technogically-advanced-anti-chainsuck-device-ever/ ]http://www.bikerumor.com/2010/09/03/tomac-k-edge-release-most-technogically-advanced-anti-chainsuck-device-ever/[/url]

would someone care to explain how it can possibly be anything to do with the frame ? never understood that logic. if the chainline is good, all parts working well/in good nick and clean then as long as the chain doesn't touch the frame why should it be a factor? I can see if the granny is too close to the chainstay you may have more issues with it getting STUCK in there but as far as I can see chainSUCK isn't related.
please tell me why if I'm wrong .

I think the theory is that you can often get a little bit of chain suck on any bike, however well maintained and setup, the only time it actually becomes a problem si where there is very little clearance between the chainrings and chain stay - any suck at all can become a problem as the chain touches the frame and jams.

So, frames don't cause chain suck but they can make any that does happen a major issue.

Don't you need to change the cassette as well if you are doing the rings and the chain?

I think the theory is that you can often get a little bit of chain suck on any bike, however well maintained and setup, the only time it actually becomes a problem si where there is very little clearance between the chainrings and chain stay - any suck at all can become a problem as the chain touches the frame and jams.

So, frames don't cause chain suck but they can make any that does happen a major issue.

Exactly.

Even new chainrings/chains etc suck to some degree or other, whether it gets caught ont he frame and locks up is frame dependant. Which is why people report it with new kit. I had it on my 456 so bad, I spent £100's on new drivetrain trying different chainrings etc. In the end I proved to myself it was the frame. I use my bullit to test/wear out sucky chainrings as the chainstays are miles away, I've used totally knackered chainrings that would suck like crazy, but fine on the bullit, they still suck but don't get caught or go over so you just carry on riding.

There is an SRAM video somewhere that shows new kit sucking, and I've been told by a US SRAM technician that they advise framebuilders on clearance etc.

Aggravated by insufficient clearance between chainstay and chainrings. Can you get another spacer on the drive side BB cup to push the chainrings out a fraction? There might not be enough thread to hold properly it so be careful.

i'm going to be all crazy and controversial and that and suggest it may be the bottom screw on the front mech and the point at which the chain gets shifted down to smaller rings

i've found that if you set the front mech so it only just nudges the chain down, maybe with a bit of rubbing before it drops, it is more liekly to chainsuck. try setting it so it's a clean push down. (i hope that makes sense!)

I doubt it has anything to do with the frame. I've had it for 2 years and chainstuck has only been a problem for the last few weeks.

The problem is that when shifting from granny to middle the chain is remaining stuck on the granny and being dragged up between it and the middle. Like it would if the rings were worn....but they're brand new!

ah, well ignore my earlier post. sounds like you need to tweak the cable on the front mech to push the chain a little further - have you tried winding out the barrel adjuster on the shifter?