Phil, I think it's somewhat normal for your tires (rear specially) to wear on the inside due to neg. camber. However is the wear excessive? Then alignment may come in play here. Did you check the suspension and alignment?

__________________

Dinan S1 pkg / 22" Iforged Swift - Toyo 295F*315R / Eisenmann Race - OEM tips / H & R 15mm front
30mm rear spacers / Euro-spec headlights / CF M Competition steering wheel / Full CF interior /
6000K D2S / HID fogs / AiBrights V3 / Interior Xenon / LED sidemarkers / Matte black grille & hood vents