Bosch power chewing up chains and cassettes

[Plummet]

Changed XT Cassette (now M8200, former M8100) and XT Chain at 2100 km. Derailleur changed from XT mechanical to XT Di2 approx. 400 km earlier.

Mondraker Crafty R, 120 Nm now, 100Nm since Update release date before.


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Those are good values, you should be happy with them.

Maybe try running more chains, might get more cassette life.

 

[keton22]

Bosch powered ebike chewing up chains and cassettes twice replaced in 5000km. Mechanic states it is because of the narrower gears and chains on the 12 speed. Thoughts please?

that's awfully soon. I've just passed 2.5k km on Sram Force AXS 12 speed grupset paired with Bosch gen 5 and wear indicator shows <0.25 wear (3 teeth type one, first tooth does not want to go in yet). Immersive waxing every 300km since day 1.

 

[Pentti]

Is that^^^ any more accurate than Park Tool CC-2 Chain Checker, and if so how much more accurate? I always take more than one reading with the PT CC-2 on different parts of the chain.

I think so, there's no "how hard do you push it in" problem, it's basically an old-fashioned, straightforward measurement between the centres of the rollers. Deadly accurate on any bike chain (flattop chains have larger dia rollers). You can see exactly what it is you are measuring as the centres gradually move apart as the chain wears. Silly expensive though and patents mean no Chinese copies seem to be available.

 

[Suns_PSD]

Wow lol. I’ve also said it many times, if Bosch does it you guys would lay off the restriction talk. Turns out I was right . Guess it’s not dangerous to trail access and human life if it’s bosch. You have to have over 60 posts on class 2+ rhetoric

You misunderstand, but that's fine. My stance has not changed that e-bikes should remain legal if sold as Class 1, even if I think there is room for evolution of the LEGAL definition.

 

[Suns_PSD]

My stuff is all correct, set up, etc.
I have three brand new X01 Eagle chains and wax them and was getting sizing correct and all that. This one went on about 2 mi earlier. I was in turbo mode which was accidental and in full on attack mode and stomped on it in about 9th gear which was a bit off as I should have probably been 2 gears lower and it popped the chain. Wasn't at the master link, wasn't shifting either.
I tend to agree that we're just reaching the limitations of these drivetrains at current power levels.

 

[F4Flyer]

The way most guys ride their eMTBs, the current chains will wear out quicker. The all-steel cassettes are a good idea but the chains have no solution. 8-speed chains were thicker and stronger but they also had 3 front rings. I used 2 and 3 rings with my 9-speed rigs. Curiously, I have had zero issues with 11 and 12 speed chains. I did break a couple of 9-speed chains though, so maybe a specially made 12-speed chain is the answer. They have always gone for weight reduction in general.

 

[bmwpowere36m3]

That is not an M6100 cassette

Nor a M6100 chain... looks like a SLX cassette (1 aluminum gear) and KMC chain. My bike came with a M6100/Deore chain and it wore out at 250 miles. Now I got a XT chain, which I run on all my analog bikes. We'll see if it lasts any longer.

At this rate, once the drivetrain wears... I'll likely jump to 11spd linkglide.

 

[bmwpowere36m3]

Is that^^^ any more accurate than Park Tool CC-2 Chain Checker, and if so how much more accurate? I always take more than one reading with the PT CC-2 on different parts of the chain.

I don't like the CC-2 because the readings are influenced by how hard you press the checker. I prefer the CC-4 as its the most repeatable and aligns with pin to pin measurements I've done.

IME on analog bikes, even with a thousand or two miles on a single bike, I've never seen 0.5% wear. Running Shimano 12 spd drivetrains the last 5 years on multiple bikes. However, laterally the chains most definitely have had significant wear and shifting performance deteriorated. The wear process is so slow and drop in shifting performance... that when you put in a new cassette and/or chain and its like WOW, this is what it shifted like when new.

The Abbey tool is cool because it has some metric for checking lateral wear on chains.

 

[irie]

I don't like the CC-2 because the readings are influenced by how hard you press the checker. I prefer the CC-4 as its the most repeatable and aligns with pin to pin measurements I've done.

IME on analog bikes, even with a thousand or two miles on a single bike, I've never seen 0.5% wear. Running Shimano 12 spd drivetrains the last 5 years on multiple bikes. However, laterally the chains most definitely have had significant wear and shifting performance deteriorated. The wear process is so slow and drop in shifting performance... that when you put in a new cassette and/or chain and its like WOW, this is what it shifted like when new.

The Abbey tool is cool because it has some metric for checking lateral wear on chains.

Faint praise.

 

[Purple parznip]

So a chain and cassette lasts about 2,500km = 1,500 miles?

Rule of thumb is to change the cassette after the third chain is worn out (ie past "max wear point").

Perhaps your chain is not being changed frequently enough and so destroys the cassette?

What conditions are you riding in and what is your bike and transmission?

I got 3000 miles out of my cassette and front chainring,changing chains at approx 400 miles,chain checker is the best fiver you will spend,if you keep chain lubed and clean,you should get a decent mileage out of the cassette,gen 4 bosch with volspeed rim magnet chip,120 nm.