A mate of mine has offered me some alloy wheels off (I think!) a megane for nothin if i want them. At the minute i just have steel 13's so obviously i wud like these. Anyway, I took the old wheel off and fitted the new one, and the studs seem to line up, only the part of the hub in the centre which sticks out and the wheel sits on too (Im sure theres a proper name) seems to be a tad too small. ie, the wheel can wobble about a bit if the studs aren't in. Is this bad, does this matter, anything I can do?