I see a lot of confusion and conjecture about the bosch rattle, what it sounds like, how loud it is, what conditions cause it etc.
I think I've found a way to recreate the rattle noise on demand, by agitating the chain ring quickly back and forward?
I've tried this on a rail 9.8 and 7, both 2022 models and they both can create this sound, albeit with slightly different frequencies of carbon vs alloy.
You need to roll the bike around and move the cranks if you try this and feel no play at the chaining and subsequently no noise. Also lifting and dropping the rear end also can exhibit the noise.
I think I've found a way to recreate the rattle noise on demand, by agitating the chain ring quickly back and forward?
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I've tried this on a rail 9.8 and 7, both 2022 models and they both can create this sound, albeit with slightly different frequencies of carbon vs alloy.
You need to roll the bike around and move the cranks if you try this and feel no play at the chaining and subsequently no noise. Also lifting and dropping the rear end also can exhibit the noise.
- So is this the standard Bosch gen 4 rattle? Or is there possibly another issue at play?
- Can anyone else recreate this on their rails?