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If you've done so, it doesn't matter if you've done chain calculations or small-small, you're still fucked no?
You're either working to the recommended manufacturer recommendations or you're pushing limits and thus pushing working parameters. At that point, you really shouldn't be online asking for recommended methods, as you're far outside the scope of recommended calculations.Doesn't matter what you're doing, always test before use. Then shakedown, test again, then ride.
I've also read what OP was saying, he's on a 1x system, so my recommendation isn't misplaced.
Yeah but if you’ve fitted too large a cassette or too short a cage and you set chain length based on the smallest combination, as hazzelfrazzel points out, you’re going to run into trouble when your chains too short and you grind to a halt with your jockey wheels in your spokes. In practise it would rarely happen but I feel like it’s just safer to suggest setting chain length based on the biggest combination