Rear Tyre is smaller.!
 

Hi everybody,do anyone know the rear tires[275/35-19] is actually smaller than the front tires[245/40-19] by 5 mm in diameter.?Nissan should have use 285/35 or 275/40 for the rear tyres,usually sports car should have bigger rear tyres...in my view.

I was wondering the same thing, btw. Its actually fairly noticeable from the side, too...

I know my rears will be getting more meat, especially after my little curb rash run in, yesterday. Irritating...

ok if we change the rear tire with 275/40
is there any problem with it ?? i mean in stock rims

It will fit the rim. Higher profile tires are easier to fit than low profile actually. Just check that the overall tire diameter is within a reasonable range of the front diameter (<1% is ideal).