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Got my new bike just over a year ago, its my do everything bike and plays off road as well on road, which includes chaingangs.
My chain checker said the chain was too stretched after two months to just put a new chain on, so I decided to just leave it and change it when it started slipping.
Problem is, it has not started slipping yet, the gear changes are a bit sloppy sometimes, but it was kinda like that from the start!
Its Sram X5 2x10, how much longer will it last before it starts slipping or the chain snaps?
How long do you get out of your do everything geared bikes chain/cassette?
If you just let everything wear together then it can last for far longer than you expect, you'll get a few more noises, and a some vague shifts but it will keep working...
The problem comes when you have uneven wear, either from introducing new components into a worn drivetrain, or having particular gear combos that see such little use they end up with very different wear levels, ie: a well worn middle ring and untouched granny, or particular cogs at one end of the cassette with virtually no wear.
Chain probably won't snap. Normally things get sloppy and annoying before then and you'll want to change.
How long things last is a varied question. Road stuff lasts forever. Mtb stuff less so.
My do it all bike is a CX. I am about to replace the whole drivechain. I've had it on 3 years (all be it on the third chain) and I guess it will have done somewhere in the region of 10000 miles. But it gets a hard life. Plenty of big rides (100mile+) off road where it get's hammered in bad weather and mud. It also races CX so spends an hour completed covered. I decided it was time to change when I realized the jockey wheels were virtually toothless.
It depends on the conditions, I used to get around 1000 miles out of the MTB chains before they needed changing (that way the cassette would last 2 or 3 chains).
My cross bike did 3800 miles on the same chain and cassette last year without any problems (but it does need a new chain and probably cassette now), the chainset still has the original rings and they've done around 7500 miles.
If you let your chain get too worn you'll end up needing new chainrings, cassette & chain (and probably jockey wheels too).
When I only had one mountain bike and it was getting ridden in all conditions I was getting 18 months or probably 1500-3000 miles out of it. That's running it til it dies and with an alu chainring.
Obv, YMMV and conditions vary (esp with regards to on/off road) but HTH.
Everyone's experience will be different
Personally it's a long time. A very long time. So long that I have to read internet forums to remind me that things need replacing from time-to-time
Two key factors in this:
1) Bike gets washed as often as Xmas
2) Wippermann chains