hi, ive recently changed my standard steel wheels on my ibiza 1.2s for some alloy wheels off the ibiza 1.2 sx. i have been told the origonal bolts cannot be used as they wont hold the wheels on properly and may come off!? is this true? do i have to buy a specific set of new wheel nuts for alloys wheels? are they somehow different to nuts for alloy wheels? please help! im a bit reluctant to drive anywhere untill i know for sure!