Williams 1 standard brake disc dimensions

[gavs1985]

Hi all, could anybody enlighten me to as what are the Disc Dimensions for a williams 1,
Front- 258 x 20mm Vented
Rear- 238 x 8mm Solid

are these the correct sizes??
i have a document that states the rears are 258 also??????
any help apprieciated

[Coops]

nah rears are definatley smaller so i'd go with first set of dimensions, sound about right to me

[gavs1985]

thanks