Shimano XTR CN-M9100 chain on 9100 series Dura Ace

[Maddie]

Another issue that I would suspect is that your drivetrain may be worn along with your Dura Ace 11 speed chain. When putting on a new chain on a worn drivetrain...would pose an issue with shifting. I put my 12 speed chain on a my newest drivetrain with minimal miles on it...and worked as others have mentioned.

That's my take on your shifting issue.

Hello
all parts of the drivetrain are brand new, zéro km.

I have checked the pulleys. No inversion beetween top and bottom.
And rotation direction is good
20210810_142850.jpg

That's incredible
That's why I think my xtr chain is a bad copy.

Can someone mesure internal size of xtr9100 chain?

Top jockey wheel is running wrong way round. The arrow on the lower edge points forward, counter to the rotation.

Both jockey wheels are rotating correctly.

Great timing to stumble upon this thread as I'm looking for a new chain. Found a source for the XT M8100 chain in Canada. I'll be running this on the 11 spd Shimano 105 r7020.

On the website is shows the chain as having a "one time use" quick link. Is this the case? Any recommendations on other suitable reusable quick links?

Connex wipperman quick link..don’t need a quick link tool to attach/detach

I thought the 12s connex link is not available yet? Supposed I'm wrong, where is it available?

[tfayet]

Another issue that I would suspect is that your drivetrain may be worn along with your Dura Ace 11 speed chain. When putting on a new chain on a worn drivetrain...would pose an issue with shifting. I put my 12 speed chain on a my newest drivetrain with minimal miles on it...and worked as others have mentioned.

That's my take on your shifting issue.

Hello
all parts of the drivetrain are brand new, zéro km.

I have checked the pulleys. No inversion beetween top and bottom.
And rotation direction is good
20210810_142850.jpg

That's incredible
That's why I think my xtr chain is a bad copy.

Can someone mesure internal size of xtr9100 chain?

Here you go buddy:

Between inner links- 2.45mm
Between outer links- 3.90mm

Thanks for the mesures

For my problem chain
Between outer links- 3.90mm good
Between inner links- beetween 2.3 and 2.35mm not good

II think it is the reason of my problems...
Tomorow I receive my new xtr9100 chain

I will take mesure before install it

I will keep you informed

New XTR M9100 chain received today.
Still the same problem...
See photo, the chain can not be release easily from the top pulley. There is no special effects on the photo

The last possibiliy is that the top pulley is out of tolerance....

ok with me? or other solution?

[alexmcm09]

Hello
all parts of the drivetrain are brand new, zéro km.

I have checked the pulleys. No inversion beetween top and bottom.
And rotation direction is good
20210810_142850.jpg

That's incredible
That's why I think my xtr chain is a bad copy.

Can someone mesure internal size of xtr9100 chain?

Here you go buddy:

Between inner links- 2.45mm
Between outer links- 3.90mm

Thanks for the mesures

For my problem chain
Between outer links- 3.90mm good
Between inner links- beetween 2.3 and 2.35mm not good

II think it is the reason of my problems...
Tomorow I receive my new xtr9100 chain

I will take mesure before install it

I will keep you informed

New XTR M9100 chain received today.
Still the same problem...
See photo, the chain can not be release easily from the top pulley. There is no special effects on the photo

20210811_121044 (1).jpg

The last possibiliy is that the top pulley is out of tolerance....

ok with me? or other solution?

How does the chain run when you're actually riding the bike and not just fiddling with it in the stand?

[tfayet]

Here you go buddy:

Between inner links- 2.45mm
Between outer links- 3.90mm

Thanks for the mesures

For my problem chain
Between outer links- 3.90mm good
Between inner links- beetween 2.3 and 2.35mm not good

II think it is the reason of my problems...
Tomorow I receive my new xtr9100 chain

I will take mesure before install it

I will keep you informed

New XTR M9100 chain received today.
Still the same problem...
See photo, the chain can not be release easily from the top pulley. There is no special effects on the photo

20210811_121044 (1).jpg

The last possibiliy is that the top pulley is out of tolerance....

ok with me? or other solution?

How does the chain run when you're actually riding the bike and not just fiddling with it in the stand?

When I ride the bike with XTR chain, the gear/chain make noise and the chain is not released easily from the top pulley
When I install Dura ace chain, all is fine

[robbosmans]

Top jockey wheel is running wrong way round. The arrow on the lower edge points forward, counter to the rotation.

Its not, bottom pulley rotates clockwise, top pulley counter clockwise. The text on these is always on the inside.

[ryanw]

Top jockey wheel is running wrong way round. The arrow on the lower edge points forward, counter to the rotation.

Its not, bottom pulley rotates clockwise, top pulley counter clockwise. The text on these is always on the inside.

+1

[tjvirden]

When I ride the bike with XTR chain, the gear/chain make noise and the chain is not released easily from the top pulley
When I install Dura ace chain, all is fine

Have you measured the new chain?

[tfayet]

When I ride the bike with XTR chain, the gear/chain make noise and the chain is not released easily from the top pulley
When I install Dura ace chain, all is fine

Have you measured the new chain?

Yes
The chain I received today

Between inner links- 2.40mm
Between outer links- 3.90mm

That's an incredible problem

[ultimobici]

When I ride the bike with XTR chain, the gear/chain make noise and the chain is not released easily from the top pulley
When I install Dura ace chain, all is fine

Not out if tolerance, incompatible. You’re trying to use a 12 speed chain on an 11 speed system. Parts are built with certain tolerances , which is why your Dura Ace chain is fine. But the margin of error is tighter when you introduce a chain that is designed for a narrower drivetrain system.


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[ryanw]

XTR CN-M9100

Outer link:
5.25mm - OD
3.80mm - ID

Inner link:
3.50mm - OD
2.20mm - ID

Using a Mitutoyo calibrated digital caliper.

[tfayet]

When I ride the bike with XTR chain, the gear/chain make noise and the chain is not released easily from the top pulley
When I install Dura ace chain, all is fine

Not out if tolerance, incompatible. You’re trying to use a 12 speed chain on an 11 speed system. Parts are built with certain tolerances , which is why your Dura Ace chain is fine. But the margin of error is tighter when you introduce a chain that is designed for a narrower drivetrain system.


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I understand.
But why does it works perfectly with some person of the forum
Dura-ace 9100 group with xtr9100 12v seams be good and better than Dura-ace 11v chain

[tfayet]

When I ride the bike with XTR chain, the gear/chain make noise and the chain is not released easily from the top pulley
When I install Dura ace chain, all is fine

Not out if tolerance, incompatible. You’re trying to use a 12 speed chain on an 11 speed system. Parts are built with certain tolerances , which is why your Dura Ace chain is fine. But the margin of error is tighter when you introduce a chain that is designed for a narrower drivetrain system.


Sent from my iPhone using Tapatalk

I understand.
But why does it works perfectly with some person of the forum
Dura-ace 9100 group with xtr9100 12v seams to be good and better than Dura-ace 11v chain

[tjvirden]

When I ride the bike with XTR chain, the gear/chain make noise and the chain is not released easily from the top pulley
When I install Dura ace chain, all is fine

Not out if tolerance, incompatible. You’re trying to use a 12 speed chain on an 11 speed system. Parts are built with certain tolerances , which is why your Dura Ace chain is fine. But the margin of error is tighter when you introduce a chain that is designed for a narrower drivetrain system.


Sent from my iPhone using Tapatalk

I understand.
But why does it works perfectly with some person of the forum
Dura-ace 9100 group with xtr9100 12v seams be good and better than Dura-ace 11v chain

Next thing is to measure the thickness of the pulley wheels.

I get about 2.20-2.25mm on a new R9100 upper pulley

Edit: my caliper is not a 'proper' calibrated one, but ryanw's measurements indicate why there might be a problem

[tfayet]

I did this thing.

The only problem is that my narrow wide jockey wheel is designed for 11s so it's a bit wider. I filed down the wide tooth maybe 0.3mm. They are made of nylon so it's not hard to do.

Now it is good.
Top pulley was à little too much large

[pdlpsher1]

Here's a side-by-side comparison between the XTR and Dura Ace chains. The XTR is on the left. The second photo shows two different styles of XTR chains. One says 'HG' and another says 'XTR'. I have both styles. Besides the stamping everything else is identical.






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