Except that when you put on a tire thats too small, like the 45 series tire is, and you dont correct the speedo, because let's face it, most people won't. Over time your odometer will be off, showing more miles than you have actually travelled. For instance. With 45 serires tires, when you odometer shows that you tavelled 100,000 miles with them (take for granted that you will always use that size tire from now on), which is completely feasable with honda cars, you will have in fact, only travelled 98,600 miles. Thats a difference of 1,400 miles. I dont know about you, but Having your odometer show 1400 more miles on the car, than Actually are on the car, does not appeal to me. Now, if you use the 50 series tire, the tire is actually a little bigger than stock. But your odometer wont be reading fast, in fact it will be reading slow. That means your odometer over time, will show that it has less miles than it actually does. When your odometer reads that it has travelled 100,000 miles, your car will have in fact travelled 101900 miles, a difference of 1900 miles. Personally, Its not a big difference, but when I sell my car, I would rather my odometer say that my car has less miles than it actually does, as opposed to saying it has more miles than it really does. ant BTW, there is only a 10.7mm difference in the sidewalls of the 2. On a 6th gen, 17" wheels arent going to exactly look like major low profile tires, And theres a little more rubber and air to absorb road inconsistencies, like potholes. You have less of a chance, albeit a small one, of bending a rim with the 50 series tire.

Rant mode off.