Tim is right,I've had 30-series 20" tires on the back of this car and they looked like band aids.
My fronts are 25.57" tall and the rears are 26.4" tall so I've got that slight rake we all want built-in.I'm not sure if it's because they're drag radials but I think the rears have plenty of sidewall...tire program puts that @ 4.2"