Bosch power chewing up chains and cassettes
- Thread starter Eon
- Start date
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?
Leakintheboat
New Member
your getting 5000kms? im lucky to get 500kms from a 12 speed chain before it snaps at 100nm.
Changing to Wax and then topping up with a Lube like squirt will instantly see an overall life increase relating to wear.
Personally i changed to linkglide 11s
Changing to Wax and then topping up with a Lube like squirt will instantly see an overall life increase relating to wear.
Personally i changed to linkglide 11s
paul.williams_1981@yahoo.
New Member
I have XX1 chain on my bike 1250 miles and was just starting to creep past 0.75 changed it out for a new chain and its running like new. I do not have a strick cleaning routine just occasionally crean degrease and oil when needed.
Hopefully I will get 3 chains out of the cassette. CX gen 5 motor.
Hopefully I will get 3 chains out of the cassette. CX gen 5 motor.
Trek-Rail-eBike
Active member
I just changed both of our Trek Rail drivetrains at 1,000 miles : the Chain, cassette, jockey wheels and front chain ring.
I'll be fitting a new chain every 300-400 miles now to reduce wear on the more expensive cassette
I'll be fitting a new chain every 300-400 miles now to reduce wear on the more expensive cassette
bmwpowere36m3
Member
2500 KM per cassette and chain... yea, seems par of the course with ebikes. Though generally you should get 2-3 chains per cassette, as long as you replace the chain early enough. At first signs of 0.5% wear.
I just wore out a 12spd Deore chain in 230 miles on a Bosch CX bike.
I just wore out a 12spd Deore chain in 230 miles on a Bosch CX bike.
1. As long as you buy a quality chain, you will do better than economising by buying cheap chains. Not only will your chain last longer, but because it lasts longer, so will the rest of your drive train. A worn chain acts like mechanical AIDS; it spreads the wear to everything it touches.
2. Measure the length of your chain on a regular basis to keep an eye on it. Once it starts to go, it and everything else it touches can go rapidly. You can use gauges, but they are too imprecise (OK/Scrap). But I prefer to remove the chain and measure over 100 links (50"). The amount over 50" is the wear. Over that disstance a metal tape measure used properly is very accurate.
2. Measure the length of your chain on a regular basis to keep an eye on it. Once it starts to go, it and everything else it touches can go rapidly. You can use gauges, but they are too imprecise (OK/Scrap). But I prefer to remove the chain and measure over 100 links (50"). The amount over 50" is the wear. Over that disstance a metal tape measure used properly is very accurate.
Plummet
Flash Git
- Thread starter
- #11
This is a Bosch Performance Line CX @ 85NM of torque. I have the same motor in a similar bike but only 10 speed with a much longer chain/cassette life span. Riden mostly on rail trails at average 20 kph so mainly in higher gears - I’m easy on my bikes as I just need to enjoy the ride without torturing them. BTW 2 chains and 2 cassettes within 5000km becomes expensive cycling. Chain well maintained cleaned, lubed etc. also consider that in Australia e-bikes are governed to 25km after that you’re on your own steam on a very heavy bike. Time to go back to acoustic?
Leakintheboat
New Member
On my previous bike wich had the slx 12 speed casette with xtr chain and axs group I've only had 2 casettes on 11k km.
1st casette I rotated xt and slx chains with a wax drip lube that lasted me over 5000km.
Seccond casette I used 1 xtr chain and that lasted me the same milage. It snapped at the end but wasn't weared out.
With those casettes I changed the smallest sprockets 2 times.
Use effetto mariposa flower power wax all year round from dust to pure mud season
1st casette I rotated xt and slx chains with a wax drip lube that lasted me over 5000km.
Seccond casette I used 1 xtr chain and that lasted me the same milage. It snapped at the end but wasn't weared out.
With those casettes I changed the smallest sprockets 2 times.
Use effetto mariposa flower power wax all year round from dust to pure mud season
AlsbachRyder
New Member
- Feb 18, 2026
- 34
- 77
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.
Mondraker Crafty R, 120 Nm now, 100Nm since Update release date before.
Trek-Rail-eBike
Active member
Trek-Rail-eBike
Active member
Indeed.
The Deore M6100 cassette doesnt have any Aluminum rings, they are all steel. A little heavier but more robust.
This is a M6100
- Check your chain using a chain gauge. Replace early. MUCH cheaper than new drive train.
- dial down "dynamics". This is how fast your motor comes online. Same power, same assistance, but it doesn't spike
- keep chain somewhat clean. Sand ...well... sands off your teeth
- dial down "dynamics". This is how fast your motor comes online. Same power, same assistance, but it doesn't spike
- keep chain somewhat clean. Sand ...well... sands off your teeth
Pentti
New Member
The very best way IMHO to measure chain wear without the need to remove the chain from the bike (new connector link) and equivalent to measuring with a rule, is this tool from Abbey Bike Tools LL Chain Wear Tool
Very expensive (for what it is) BUT easy to use and deadly accurate on ALL chains (Flattop has larger diameter rollers)
I've stated too many times that I support Class 1 standards, in the USA anyways.
That said, if the power is the same I'd like to have a higher top speed for jumps and road transfers. It's a bummer to have no assistance in the top 2-3 gears if you have any cadence at all.
If you are using the stock settings, changing a chain that often is pretty normal. I'll get more but I mostly ride pretty detuned and in the lowest mode as well. No idea which cassette you use but the Deore is all steel.
Also, just steady torque does not stretch the chain unusually. It is the bursts of torque that do....like suddenly accelerating up a steep slope.
Also, just steady torque does not stretch the chain unusually. It is the bursts of torque that do....like suddenly accelerating up a steep slope.
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.
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