M12 x 1.5 pitch thread
Be careful as they have a ball seat not a taper.
Wheel Nut Elise S1: A111G6001F as per parts manual
M12x1.5 bolt with a tapered seat. (eg. Vauxhall Corsa)
The length should be 25-30mm. However the 135R OZ wheels are slightly thicker so will need a longer bolt.
Standard Wheel Bolt Elise S2: B117G6000F
Do not over torque the nuts they will shear invest in a torque wrench or you will end up paying out for a new set of wheel bolts, or maybe a new car!