hes probably running the same tires size front and rear which will fine (still not ideal, due to the increased stretch the diameter is probably slightly off front/rear, but probably within tolerance).
too bad his car is total failure. no suspension travel, retardedly stretched tires. tires are probably something like 205/30/18 or 225/30/18 on 9-10" wide wheels..., the sidewall and overall diameter looks tiny.