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My girlfriend has a Raymon HardRay E-Nine 6.0 2020.

She already rode 4000 km with it, basically she drives a lot and its not getting less.

The bike reached the point where the chain is slipping all the time.

As for now will replace everything the cassette, the chain, the deore ....

We didn't had any knowledge in riding bikes that much so we didn't replace the chain or anything till now, also the bike didn't get much "hygiene".

I wondered if there is also more reliable "replacements" that the original Shimano CS-M4100, 11-42 ? Which will last more km?

Or if the "hygiene" aspect like put oil on the chain and replacing the chain every 2000km will make the cassette and the rest last way longer.

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  • Can you add the conditions the bike is being ridden in? Is it used regularly for trail riding? And does it frequently get ridden in muddy, dusty or sandy conditions?
    – Andy P
    Jul 15, 2022 at 12:32
  • It could be that things just need adjustment. Jul 15, 2022 at 12:48
  • Things that maximize drive train life are cleaning, lubrication and don't ride in the same gear all the time.
    – David D
    Jul 15, 2022 at 12:57
  • @AndyP The all train but mostly thought the forst and more hilly sight, quite a lot of ground (can be mud) and gravel.
    – Schwenk
    Jul 15, 2022 at 13:23
  • Interesting, I guess on an electric bike you do not get the feeling of the state of the drivetrain the way you feel it on a regular bike, so the urge to lube and clean the chain is not as strong. Jul 16, 2022 at 5:30

2 Answers 2

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The M4100 is all steel, so I don't think you'll find more durable replacements. The first culprit in cassettes wear is, as you wrote, a lack of "hygiene" for the chain: a worn chain will accelerate the wear of the cassette. The common rule is to replace the cassette every 2-3 chains, if chains are replaced timely.

Replacing the chain should be done when worn, not "every 2000km", as the mileage will depends on the conditions in which the bike is ridden.

Riding a bike in a dusty environment with "wet" lubricants (=for rainy conditions) is the worst for example. Your profile you indicate you are from Germany, from what I understood from the German participants of this stack, wet lubes are the default there. The best is too use a chain gauge, and replace it when the wear goes beyond 0.75. "Dry" lubes deal better with dust/sand, but not with water (they are washed away faster).

Chain maintenance has been already addressed in some other questions, like this one.

EDIT: I'd be suprised that you really need to replace the derailleur (the little wheels can be replaced separately). But if you do, an option to consider is the new Linkglide range of Shimano. It's a new product line where durability is prioritized over weight (according to Shimano, it's up to 3 times more durable). I don't have personal experience with it, but it's worth investigating.

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    What is your source for "replace the cassette every 3 chains"? It would be nice to know before it becomes a question of religion.
    – Noise
    Jul 15, 2022 at 12:52
  • @Noise I often end up with 1 cassette : 2 chains, but I ride in all conditions. Cassettes last longer on my commuter/hybrid
    – Chris H
    Jul 15, 2022 at 13:18
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    @Renaud, you're also in northern Europe I believe, though drier than my bit. We can easily have dusty and wet conditions within a week, even a ride, and changing lubricants means a really good clean is needed - so unless you can have a dedicated dry-conditions bike, wet lubricants are the way to go (or wax but that's another story)
    – Chris H
    Jul 15, 2022 at 13:21
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    @Renaud I don't trust a normal clean in between lubricant classes - if I was changing between wet and dry, I'd want a bath cleaner of some sort, probably ultrasonic. But my tourer is mostly used on roads, which don't get too dusty, and my MTB is used less, mostly on hard-packed dirt, but an otherwise dry ride can easily include fording streams (I have 3 locally that I've ridden)
    – Chris H
    Jul 15, 2022 at 13:30
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    @Noise - That's the rule of thumb that I've used. Certainly it doesn't have absolute accuracy, but it's a practical rule to follow. Jul 15, 2022 at 17:33
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Inspect the worn cassette. If a single sprocket is worn much more than others, replacing just that more timely may be much cheaper option.

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