Originally Posted by
palincss
You used up a cassette in 1553 miles? The only way to do that is by running a seriously worn chain. If you clean and lubricate your chain properly and measure chain wear as it is happening, replacing the chain as soon as it hits the first wear mark on the chain and well before you reach the second, your cassette should easily last for at least three changes of chains. This is a pretty big deal, when you consider how much cassettes for e-bikes cost. The Deore XT M8000 cassette on my e-bike is typically just over $100, while chains usually are about $40. I suggest you get yourself a good chain wear tool, like the Park CC3.2. It's around $12
Replace the chain when it reaches 0.5 (that is, when the 0.5 pin fits into the chain) and before it reaches 0.75 and you not only won't be replacing chains before it's necessary, you also will be able to reduce the number of cassettes you replace. Basically, this tool pays for itself the first time you use it.
Hey man, I believe I mentioned earlier that the original cassette was replaced to try a slightly different ratio spread. It was showing some signs of wear, but still had plenty of life left.
My chain checker tool only has a side for 0.75, and 1.0 . I replaced my first chain when it was almost able to slide into 0.75, but not quite unless I pushed harder onto the tool.
The pins on my current chain vary in wear rate from 0.15 up to 0.4 or 0.5 in some areas. The bike will shift pretty roughly under power when downshifting, which probably explains the uneven wear rate.
My new chain is otherwise well oiled and kept fairly clean. It hasn't really seen any rain since installing a few months ago. The mid drive system places a ton of extra stress onto the drivetrain, especially if you place the motor under higher load conditions or shift through the cassette frequently.
Assuming I replace the chain every 2000km, I would expect almost 7000km on my 1x chainring, and maybe about 5000km out of the cassette before the entire drivetrain would need to be refreshed. Considering the huge amount of stress the drivetrain is placed under, which is otherwise not specially designed for E-Bike motors, those figures minus the horrendous chain wear rate, seem pretty good.