Check first they are M12 bolts. If mine, where possibly I don't know if the wheels are original, I would check to make sure it had at least 10.9 rather than 8.8 grade bolts, and torque up to 130 Nm.
The bolt grade ought to be moulded on the top of the head, visibly.
They must be at least 10.9 Grade to use at this value; also if they are not, then there is every chance along the way in the past they have already been over torqued.
See the torque up ratings table in this bolt rating
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