From an old post by Lotus7:
Basic wheel specifications for the X3(F25) chassis are:
Bolt Circle = 5 X 120mm
Offset = 45mm (43 to 47mm acceptable)
Hub centering Bore = 72.5 mm (hub ring dia. = 72.47mm)
Bolts = M14X1.25 Spherical seat, 17 mm heads (Note the X3(E83) uses M14X1.5 bolts)
Minimum bolt engagement = 9.5 turns
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