I suppose you have the 7.5 x 16 rims, then the 235/70x16 are the correct tyre.
I strongly advise to keep them as they are rare to find second hand.
I drive the 255/65x16 with winter tyres on 8x16 rims and 245/70x16 AT's in summer. 245/75x16 will fit, but you might have to remove the front mud...