I've built my own spreadsheet to do it and I get 277 as well, assuming 32 spokes !?
BUT if it's a disc hub, I can't see the flanges being evenly spaced from the centre which is what the table says for the HB-M756.
It's late, I could have messed up, will have another look manjana.
@Gren started
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I've built my own spreadsheet to do it and I get 277 as well, assuming 32 spokes !?
BUT if it's a disc hub, I can't see the flanges being evenly spaced from the centre which is what the table says for the HB-M756.
It's late, I could have messed up, will have another look manjana.