Shimano M622 cranks

Has anyone else got one of these chainsets? Its on my current bike which im trying to converst to 1x10 with a naroow wide ring.. but cant work out what the bcd is, I dont have tools handy to measure, lookdd around online and thats saying 96mm bcd which is a very weird size.. is this right or will it be 98mm??
Thanks in advance...
Thanks in advance...
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Parktools :?:SheldonBrown