Just to add to what ARD has stated, if you replace just the front or the rear, there will be a difference between the front and rear as well. The system can cope with this, but the OP was also changing the front to essentially a different size.

So when the OP stated he was going to replace the front, that is why I suggested to them to check the tire circumference. If you are only changing one axle, you cannot be too far off from what the factory/previous tires are.