WHEEL STUDS
Left: 100-7715
LEXUS IS 300 WHEEL STUDS
KNURL - .558"
KNURL LENGTH - .230"
Length- 2.600"
NOSE LENGTH NONE
5 PACK.

Right: 100-7718
TOYOTA CELICA GTS (1986-89) FRONT WHEEL STUDS
KNURL - .565"
KNURL LENGTH - .325"
Length - 2.340"
NOSE LENGTH - .363"
5 PACK.

LUGNUT
Black Oxide, hardened steel, open end, racing lug nut:

12mm x 1.5
60 degree


AND for further comparison: http://www.pbase.com/mtb_zack/image/122572286
The -7715 studs are too long for quick/efficient wheel changes (ie sub 5 minute, SCCA SOLO rules) and while lighter, the aluminum lugs are only good for ~10 on/off cycles before they are galled or stripped out.