How come titanium gear not more durable than steel?

[Karm]

I just worn my new bike cassette under 24 hours, which the evo display shows I've only ride less than 23 hours. What is beyond my surprise is that the Japanese Shimano gear is like a titanium cassette. The labels says it's m980 and it weights around 250g. The bike shop owner said my KMC chain was too beefy for this titanium cassette and it was worn like rubber. Like what? And it's heard titanium doesn't work like true titanium on bike due to manufacturing process, it's less durable than crap steel. So I replace the m980 with a $2 no-name cassette, it actually works duper fine for no-problemo 2 hours!!!

 

[Nova Haibike]

Which cogs wore out? I ask because only the larger cogs on a Shimano XTR cassette are titanium; the smaller ones are still steel.

FYI, XTR is Shimano's racing MTB group. Like Dura Ace, it is made to be the lightest, not necessarily the most durable (at least with regards to the cassette.)

 

[Karm]

I'm not sure what to make of your posting.
On my road bike I have the entire DuraAce Di2 group set with the DuraAce cassette. 5 of the sprockets are titanium and after a year and half I have not had any wear issues with it at all and I also am using a KMC 11speed chain.

For your case the only reason I would see is if you were not using the correct chain, (ie: using a 8spd chain on a 10 spd cassette etc.)
Higher speed chains are thinner
Lastly, when you said the store told you your chain is too 'beefy' that may mean too wide? ( again, not using the right chain for the cassette)

So the fault is not the cassette or the fact that it has a few titanium sprockets. The fault is you're not using the right chain.

No. 10spd KMC e10s chain for 10spd m980 cassette. Too beefy means the chain is too durable than the cassette. Also, I start the bike at highest gear with a yamaha motor just so you know.

 

[Karm]

Which cogs wore out? I ask because only the larger cogs on a Shimano XTR cassette are titanium; the smaller ones are still steel.

FYI, XTR is Shimano's racing MTB group. Like Dura Ace, it is made to be the lightest, not necessarily the most durable (at least with regards to the cassette.)

11T cog. You sure about the smaller ones like 11T that get hit the hardest are infacto steel?

 

[reed scott]

Never heard of such a thing. Even an absolutely dry unlubricated chain would not wear cogs that fast. Something is vewy vewy wong here.

 

[Karm]

Never heard of such a thing. Even an absolutely dry unlubricated chain would not wear cogs that fast. Something is vewy vewy wong here.

I don't have any surprise you've never heard of such thing in a snake oil market. Whatever. The M980 cassette is done. New KMC chain is skippy on it. Front chainring is replaced too. And I've ride only 500 miles!

 

[Karm]

Well sorry to say this but to state a cassette was worn down to being unusable in 24 hours is just hogwash.
Unless you were deceived when buying the cassette where the sprockets were actually made out of 'aluminum' and not titanium/steel. Fleabay seems to be a cesspool for fake counterfeit bike parts and fake carbon.
Moreover, only the last 5 sprockets on a XTR casssette are titanium. So the lowest 5 should be fine as they are steel.

If all 10 sprockets have rounded teeth then the problem is the chain you used, not the cassette.
And now that you state the chainring is done you should now get the hint that it's your chain, not the cassette or chainring.


Your reply here just answered everything we need to know

The person you bought the cassette from pulled a fast on on you.

I've ride the bike for under 24 hours. Yes, that how much time I've ride it like it's yesterday.
The cassette is authentic Shimano, light and hard, but worn like rubber. I don't know who designed this crap, it's a joke if the smaller cogs are not made of titanium.
Also, the bike shop owner is from Giant. I don't think he can falsely get anything unauthentic.
But the funniest thing is people don't believe a crap component can be worn down under hours. I usually count the usage by months, even years, and now a bike is counted by hours. lol

 

[McCorby]

Some of your posts in other threads indicate you may be pretty abusive to your components. Could that possibly be the issue you are having?

Start the bike with high-torque and high gear resulting in empty padel and a loud sound?

I pedal very hard on the highest gear while the motor is on the high power mode, just to know the limits of E-bike. Then the pedal goes empty with a loud bang sound. Chain is fine, chainring teeth is fine, cassette teeth seems fine. Don't know about the DT rear hub. What is the possible cause?

electricbikereview.com

 

[Karm]

Some of your posts in other threads indicate you may be pretty abusive to your components. Could that possibly be the issue you are having?

Start the bike with high-torque and high gear resulting in empty padel and a loud sound?

I pedal very hard on the highest gear while the motor is on the high power mode, just to know the limits of E-bike. Then the pedal goes empty with a loud bang sound. Chain is fine, chainring teeth is fine, cassette teeth seems fine. Don't know about the DT rear hub. What is the possible cause?

electricbikereview.com

It's the same thing. Without friction, the chain is skippy. Enough friction and cassette is worn out. And a new chain is skippy on it. The M980 cassette was not up to the task even only using 2 highest gears, 11T and 13T.

 

[Karm]

Shimano has never made a full titanium XTR M980 cassette. period!
The fact you keep thinking, and even bashing Shimano for it, that the lower cogs are not made of titanium tells us all that your were sold one thing but bought something else. Do you even know what this means?

lol, I don't even care there is a m980 cassette on my bike until it is done.
Again, it's a joke if the smaller cogs are not made of titanium. Who designed this crap?
If it's like what you said, then the smallest cog are made of piss-poor steel or aluminum. M980 or whatever it is. It's not durable.
Also, it seems like m980 is from like a decade ago. The cassette I have is authentic m980, Giant guy said it cannot be fabricated or it's too expensive to fabricate and nobody did it. It's just sanke full of oil.

 

[McCorby]

If you are starting from a stop with a mid-drive in a high gear (small sprocket), you are only asking for trouble. The load applied to the teeth of a small sprocket versus a larger sprocket in this scenario is significantly greater due to less teeth being engaged with the chain. A larger sprocket allows the load to be spread out across more teeth.

 

[Karm]

If you are starting from a stop with a mid-drive in a high gear (small sprocket), you are only asking for trouble. The load applied to the teeth of a small sprocket versus a larger sprocket in this scenario is significantly greater due to less teeth being engaged with the chain. A larger sprocket allows the load to be spread out across more teeth.

It's under-performed unreliable component for me. A true vehicle can take heavy load.

Your profile picture...is that the M980 cassette that's no good?

No, lol. Hard to believe so you check the profile picture. That's the very first HG50.

 

[reed scott]

I just worn my new bike cassette under 24 hours, which the evo display shows I've only ride less than 23 hours. What is beyond my surprise is that the Japanese Shimano gear is like a titanium cassette. The labels says it's m980 and it weights around 250g. The bike shop owner said my KMC chain was too beefy for this titanium cassette and it was worn like rubber. Like what? And it's heard titanium doesn't work like true titanium on bike due to manufacturing process, it's less durable than crap steel. So I replace the m980 with a $2 no-name cassette, it actually works duper fine for no-problemo 2 hours!!!

Aren't you the guy who likes to test your bike by starting with full power in a small gear? C'mon man .....

 

[Karm]

Aren't you the guy who likes to test your bike by starting with full power in a small gear? C'mon man .....

I don't have any surprise you've never heard of such thing on a true vehicle.

 

[McCorby]

I’m sorry, but you are not operating the bike as it is intended to be. The smaller sprockets and chain were not designed to withstand those loads. You may not want to hear that, but those are the facts.

 

[Karm]

Yes you're right this is hard to believe.
First you seem to think the M980 is all titanium when Shimano never made such a cassette. With your disclosure it's easy to see you were sold one thing and bought another.
Second, you bring up some Giant retailer as an attempt to prove the authenticity of your claim but then again why would a retailer sell you a XTR cassette that came out in 2010. Like you said, a decade ago.
This is just a troll thread.

Why should I care if you believe it or not? Anyway, you cannot buy a Giant XTC E+ Pro like me anywhere else with Yamaha Sync Drive Pro motor.
As long as the bike driven the way I like, I don't care about cassette or anything else. I told the Giant shop owner to get the best gear.
I did thought M980 has titanium on the smaller cogs and that wouldn't be stupid to have it worn out. Again, it's a joke if the smaller cogs are not made of titanium. Who designed this crap?

 

[McCorby]

Have you driven a car with a manual transmission? If so, do you start off in the highest gear? Do you believe cars are designed to operate in that scenario? They aren’t! If you did drive a car like that, would you be complaining that the clutch keeps failing?

 

[McCorby]

Why should I care if you believe it or not? Anyway, you cannot buy a Giant XTC E+ Pro like me anywhere else with Yamaha Sync Drive Pro motor.
As long as the bike driven the way I like, I don't care about cassette or anything else. I told the Giant shop owner to get the best gear.
I did thought M980 has titanium on the smaller cogs and that wouldn't be stupid to have it worn out. Again, it's a joke if the smaller cogs are not made of titanium. Who designed this crap?

Titanium would not solve your problem. Sorry, but it’s all about the physics.

 

[Karm]

Have you driven a car with a manual transmission? If so, do you start off in the highest gear? Do you believe cars are designed to operate in that scenario? They aren’t! If you did drive a car like that, would you be complaining that the clutch keeps failing?

I would pedal down the front brake and burn the tire first on a 800 horsepower car if you know what I mean. My bike is less than 1 horsepower and that's not so comparable.

 

[reed scott]

This guy is a troll. Blocked.