Di2 chain

Discuss light weight issues concerning road bikes & parts.
Timmy269
Posts: 184
Joined: Tue Nov 25, 2014 2:34 pm

by Timmy269

I ride 3 years with ultra di2 and rotor3d+ (53-39) on my sworks tarmac and never had one problem. The last few weeks on my rides the chain sometimes jumps by itself from the big chairing to the small. Also the chain goes sometimes of the chain ring and fo on the bottom bracket. I have the chaincatcher on it that was delivered with my frame, but that doesn't help. What could be the cause of this?

by Weenie


djbowen99
Posts: 75
Joined: Sun Aug 16, 2015 1:46 am

by djbowen99

Is it the same chain for 3 years?

Hexsense
Posts: 518
Joined: Wed Dec 30, 2015 12:41 am

by Hexsense

djbowen99 wrote:Is it the same chain for 3 years?

hope not. My chain stretch within 6 month. 3 years on a single chain would destroy cog, jocky wheel and chain rings already.

NiFTY
Posts: 1194
Joined: Sat May 26, 2012 11:26 pm

by NiFTY

My bet is its the original chain.
Evo 5.02kg SL3 6.77 Slice RS 8.89 viewtopic.php?f=10&t=110579" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

Timmy269
Posts: 184
Joined: Tue Nov 25, 2014 2:34 pm

by Timmy269

it's not the same chain. I replaced the chain in last year en did 3000km with it.

JScycle
Posts: 225
Joined: Wed Mar 08, 2017 11:41 pm

by JScycle

Have you checked it recently with a chain wear indicator?

Timmy269
Posts: 184
Joined: Tue Nov 25, 2014 2:34 pm

by Timmy269

No, I don't have a chain wear indicator :cry:.

Could that be the problem that the chain goes from the 53 to the 39 en it sometimes drops of the crank?

Timmy269
Posts: 184
Joined: Tue Nov 25, 2014 2:34 pm

by Timmy269

I don't think the chain, cog, jockey wheels and chainrings are worn out, what do you think?
When I replace the chain, I always replace the cog the same time.

Image
Image
Image
Image

goodboyr
Posts: 1393
Joined: Wed Jan 10, 2007 10:56 pm
Location: Canada

by goodboyr

Chain is totally worn! Take a look at the chain as it exits the top of the cassette. The chain pins no longer align with the spots between the cassette teeth. On a good chain, there is no gap..

NiFTY
Posts: 1194
Joined: Sat May 26, 2012 11:26 pm

by NiFTY

Yep. A cassette should last many chains. A chain checker costs dollars.
Evo 5.02kg SL3 6.77 Slice RS 8.89 viewtopic.php?f=10&t=110579" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

kode54
Posts: 1292
Joined: Tue May 23, 2006 9:39 pm

by kode54

i change my chains when the wear indicator hits .5

Park Tools puts out a chain checker for 11 spd chains that has .5 and .75 indications.
previous checker had .75 and 1.0 indications.

based on your pics...your front chain rings look totally worn to me.
- AX Lightness Vial EVO D + DA9150 + Enve SES 4.5 carbon hubs
- Parlee Altum + DA9150 + Enve SES 4.5 carbon hubs
- Parlee ESX + DA9150 + THM SRM PM + Enve SES 6.7 CK hubs
- Guru Praemio R Titanium + DA9150 + Enve 3.4 CK hubs

bilwit
Posts: 932
Joined: Sun Apr 03, 2016 5:49 am
Location: Seattle, WA

by bilwit

if the chain was too worn I would expect it to jump on the cassette.. if it's jumping out of the chainrings then maybe the rings are too worn for the chain (obviously cheaper to test if the chain is worn first before getting new rings).

Timmy269
Posts: 184
Joined: Tue Nov 25, 2014 2:34 pm

by Timmy269

bilwit wrote:if the chain was too worn I would expect it to jump on the cassette.. if it's jumping out of the chainrings then maybe the rings are too worn for the chain (obviously cheaper to test if the chain is worn first before getting new rings).


That's what I was thinking, if the chain is worn out, it wil jumps on the cassette. Do you think on the photo, the chainrins and the cassette are worn out?
I will buy a chain checker and check the chain also.

goodboyr
Posts: 1393
Joined: Wed Jan 10, 2007 10:56 pm
Location: Canada

by goodboyr

Timmy269 wrote:
bilwit wrote:if the chain was too worn I would expect it to jump on the cassette.. if it's jumping out of the chainrings then maybe the rings are too worn for the chain (obviously cheaper to test if the chain is worn first before getting new rings).


That's what I was thinking, if the chain is worn out, it wil jumps on the cassette. Do you think on the photo, the chainrins and the cassette are worn out?
I will buy a chain checker and check the chain also.
Sorry, I disagree. It's your chain thats shot, not the rings or cassette.

Sent from my SM-G950W using Tapatalk

grover
Posts: 1139
Joined: Mon Jul 26, 2004 1:06 pm

by grover

I can't think of a circumstance where the chain spontaneously drops off the big chainring to the small except when the chainring is worn, the chain is sloppy side to side and you're in a gear that makes quite a chainline. Say 53-28/25/22. The big ring teeth are no longer tall enough to hold the chain on the teeth against the angle that is pulling it towards the little ring (especially happens if you do half a pedal backwards when shifting your weight cornering/descending).

I don't know your yearly mileage, conditions or maintenance but three years is a long time for a set of rings to last for anyone in my opinion. I'd replace the chainrings and the chain. Given the likely worn chain is not skipping on the cassette, I'd say the cassette is shot too. Again, three years on a cassette is a long time.

Your chains aren't lasting very long now because your putting them on worn chainrings and cassette. You get away with it a few times but now it's just not working. A new chain only will probably remedy the issue for a short period because it will be stiffer laterally. But it will wear quickly.

My vote is to replace your chainrings, chain and cassette. And given the chain has dropped onto the bottom bracket a few times it sounds like your limit screw and chain catcher position need a tweek.

by Weenie


Post Reply
  • Similar Topics
    Replies
    Views
    Last post