The pitch that may be it, usually about 1.25 or 1.5 think. I know the bolts are 12mm so just need the pitch as you say. Think its 1.25 does anyone know for definate.
 
Wheel bolts on the Leon are 14x1.5, same as the Golf and every other recent VAG car.
 
the bolts are definatley 12mm there is also a thread pattern on them as it says further up pitch. usually 1.25 for 12mm, iv been told that there 14mmx1.5 before but there not as i have actually measured them they are 12mm so if anyone has same bolts, if they know there pitch could they let me know.
 
Mk2 Leon is the same as the new A3, which is listed on www.vagcat.com as being M14x1.5

Item 10 on this diagram is

8D0601139D
wheel bolt
M14X1,5X27 /

601800.png
 
I don't know what you are measuring or if it is a wheel bolt but I can assure you that all Leons use M14x1.5 wheel bolts. VAG have not used M12 wheel bolts since they moved from four stud wheels to five stud wheels. Check out the link below, especially the Vehicle Application section

http://forums.vwvortex.com/zerothread?id=654846
 
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