SRAM T-type cassette worn out after 940 miles

[Pazman]

I have canyon strive on car ltd with sram t-type xo transmission, done 940 miles on it ,i cheated the chain with a chain checker last week and it showed over 0.5 and under 0.75.
so I brought a new t-type eagle gx chain and fitted it , when riding under load up an incline the chain slips on the teeth when in 7th gear only .
bike shop said it sound like that gear is worn out !
I thought t-type as suposed to last 3 times longer than a standard cassette.
does this sound normal ?

 

[steve_sordy]

940 miles does seem a bit low. I would be disappointed as well.

Just a few questions, not designed to piss you off, just finding out.

Do you use all the gears on the cassette? Or do you stay in the same one and just change the power mode.
In case you believe that nobody would do that, @johnc and I rode (briefly) with a guy that did exactly that.

Is there a chance that your cassette is counterfeit?

Do you use boost/turbo most of the time?

What is your maintenance regime like? In other words, do you look after your transmission?

Is 7th gear your most used gear? It's a big gear so it should wear less than the smaller gears, unless it is a softer material.

Finally, I am not intimately familiar with the T-type XO cassette, but is the 7th gear the first of the alloy gears, vs the smaller steel ones? You may find that the larger alloy gears are about to show wear next.

If you give yourself a clean bill of health, then I would assume that the same is going to happen again, so change your chain sooner next time, but keep it to swap out with the second chain at a similar wear point. Then repeat.

I'd have to check, but I feel sure that I read somewhere of a SRAM tech guy saying that the T-type transmission set (all gears and chain) should be run until destruction and then replace the whole lot in one go. On that basis 940 miles is merely the start of your journey!

 

[Pazman]

Hi

im constantly changing gears , drive train always clean and lubbed
100% genuine sram parts that came on the bike from new .
7th is different to the others as the deraler uses that gear to self set its self up .
using to distruction may have lasted a long time but I would want to have it fail as it would at some when say 20 miles from my car or home .

 

[steve_sordy]

I doubt by "use to destruction" that the SRAM guy meant breaking into bits, but "no longer usable, or getting close".

If that is indeed what the SRAM guy said. You should check that for yourself.

 

[mustclime]

Alloy cassette cogs ware out fast? Omg, my world is rocked. To bad sram doesn’t make an all steel cassettes for transmission….. my $89 sram nx cassette is still good after 2000 miles( chains replaced every 500 miles.) Cable shifting FTW.

 

[Pazman]

Update on the issue

I did some google searches and found others with the same issue on gear 7 , some Hod it with gear 3 .
The fix was to release the rear wheel axle and undo the UDH derailleur ,rest the derailleur tension and nip up the axle , it should be to 11nm but axl has a bar you pull out to undo or tighten the axle so I don’t know what nm I nipped it up to ,but i wasn’t very tight .
all the 7th gear slipping has now gone and every runs sweet now ,so it wasn’t the cassette at all .
Not sure why a new chain would upset things as it did but hey it’s all good now .

 

[sethimus]

you are not supposed to change the chain, but to ride both the chain and the cassette to the ground

Chain wear intervals for Transmission will be different than Eagle Drivetrain. It's generally expected that you would replace the chain a few times over the lifespan of a cassette with an Eagle Drivetrain, but with Transmission we expect that the chain and cassette will wear together and be replaced at the same time. This is due to the increased durability of T-Type chains.

 

[Pazman]

you are not supposed to change the chain, but to ride both the chain and the cassette to the ground

Hi

Do you have a link to this information please ?
Because I’m don’t willing ride my e-bike like that tbh , I could miles from anywhere when the chain eventually goes and last time a had a chain snap it broke the derailleur and chain guard making the bike un rideable

 

[bonescro]

You're supposed to replace your chain when you hit 0.50. I had the same thing happen, although it took about 2000 miles. For the past twenty years, I had religiously changed at 0.75 with no problems. That all changed when I went to a 12-speed. I replaced it for the third time, and had skips in gears 4 through 8. It took some research, but Park (and other sites) says to replace it at 0.50.

 

[sethimus]

Hi

Do you have a link to this information please ?
Because I’m don’t willing ride my e-bike like that tbh , I could miles from anywhere when the chain eventually goes and last time a had a chain snap it broke the derailleur and chain guard making the bike un rideable

that’s what they tell mechanics in the official service course. source: i work in a shop

 

[Brown stripe]

940 miles doesn't sound to bad. I've just changed the chain on my Obrea Rise after 800 miles hopefully I have caught it earlier enough and don't need a new cassette. I have spent the last 30 years riding through mud and muck. I would normally get through one cassette, 2 bottom brackets and numerous bearings every winter

 

[Pazman]

that’s what they tell mechanics in the official service course. source: i work in a shop

Really ! Good to know , sram say change the chain at 0.8 , so your saying run it until 0.8 then replace Cassette and chain ?

 

[Pazman]

940 miles doesn't sound to bad. I've just changed the chain on my Obrea Rise after 800 miles hopefully I have caught it earlier enough and don't need a new cassette. I have spent the last 30 years riding through mud and muck. I would normally get through one cassette, 2 bottom brackets and numerous bearings every winter

I’m very happy with the chain lasting 940 miles , it was just the cassette I want happy with , but it’s all good now , the skipping on gear 7 was caused by some kind of alignment issue . Reset the derailleur and axle torque and it’s all good now .

 

[sethimus]

no they don’t, can‘t you ppl read?

T-TYPE TRANSMISSION CHAIN REPLACEMENT​

The chain, cassette, and chainring wear together over time as a result of normal use. Parts will last longer with regular cleaning.

from:

Chains | SRAM

Meta - Chains

docs.sram.com

only smartasses online these days that can’t even RTFM

 

[Pazman]

“you are not supposed to change the chain, but to ride both the chain and the cassette to the ground”

Manual says change the chain at 0.8 to limit wear on cassette!

The manual says

Depending on use case, it “ MAY “ be best to change the parts together to restore optimal drivetrain performance.
But not a sure thing .

Not sure what your issue is you talk some sh-t and send links showing you talk sh-t .

Jog on pal

 

[sethimus]

“you are not supposed to change the chain, but to ride both the chain and the cassette to the ground”

Manual says change the chain at 0.8 to limit wear on cassette!

The manual says

Depending on use case, it “ MAY “ be best to change the parts together to restore optimal drivetrain performance.
But not a sure thing .

Not sure what your issue is you talk some sh-t and send links showing you talk sh-t .

Jog on pal

0.8 is for non t-type parts.

it doesn't say anyting about it in the official manual:

https://docs.sram.com/en-US/publications/5jblJ4SRpeHwjcuWG1vPy4#hashItem=chain-cassette-and-chainring-cleaning

CHAIN, CASSETTE, AND CHAINRING REPLACEMENT​

The chain, cassette, and chainring wear together over time as a result of normal use. Parts will last longer with regular cleaning.
To determine if the parts need to be replaced, consult the Transmission Service Matrix. Depending on use case, it may be best to change the parts together to restore optimal drivetrain performance.

also nothing on 0.8 max wear in the service matrix further down

https://docs.sram.com/en-US/publications/5jblJ4SRpeHwjcuWG1vPy4#hashItem=transmission-service-matrix

but i'm pretty sure you can provide said info with proper documentation, can you?

 

[Pazman]

0.8 is for non t-type parts.

it doesn't say anyting about it in the official manual:

https://docs.sram.com/en-US/publications/5jblJ4SRpeHwjcuWG1vPy4#hashItem=chain-cassette-and-chainring-cleaning

also nothing on 0.8 max wear in the service matrix further down

https://docs.sram.com/en-US/publications/5jblJ4SRpeHwjcuWG1vPy4#hashItem=transmission-service-matrix

but i'm pretty sure you can provide said info with proper documentation, can you?

I read and quoted the link you gave me

 

[Mike O]

Update on the issue

I did some google searches and found others with the same issue on gear 7 , some Hod it with gear 3 .
The fix was to release the rear wheel axle and undo the UDH derailleur ,rest the derailleur tension and nip up the axle , it should be to 11nm but axl has a bar you pull out to undo or tighten the axle so I don’t know what nm I nipped it up to ,but i wasn’t very tight .
all the 7th gear slipping has now gone and every runs sweet now ,so it wasn’t the cassette at all .
Not sure why a new chain would upset things as it did but hey it’s all good now .

I had a very similar experience.

Subsequent to new installation of XO Transmission on a Levo by my LBS, shifting in and through 7 was terrible. Took it back asked the mechanic if he had actually ridden the bike post installation. Escalated to the mechanic I usually use there. He told me that he did exactly as you described - nothing else. Although he has always been spot on I was skeptical as this did not seem a reasonable fix for what I was experiencing at the time. I was quite worried that I had made a huge mistake spending the $.

But I've since ridden 400 miles and the system has been literally flawless.

 

[Natch]

I'd have to check, but I feel sure that I read somewhere of a SRAM tech guy saying that the T-type transmission set (all gears and chain) should be run until destruction and then replace the whole lot in one go.

Can anyone confirm this point? I was about to put on a new chain.