Wheels/Tires on Kaminari Yaris

[Thirty-Nine]

Well if stock is 185/60/15, then the "correct" size would be either 205/55/15 or 195/60/15. But it seems most people here run a 205/50/15 or 195/55/15, both of which are smaller. I realize they'll provide better acceleration and some think they look better, but you're also putting more miles on the car with a smaller diameter. Granted, I'm not sure how many more miles. It could be very minimal (I'm sure we could figure it out).

In fact, between a 185/60/15 (850 revolutions per mile) and a 205/50/15 (874 revolutions per mile) there's 24 revolutions difference.

My math stinks so feel free to correct me:

1 mile / 24 revolutions = .04 additional miles
.04 miles x 15,000 actual miles per year = 600 extra miles a year

(Is this right?)

The info was obtained using this: http://www.miata.net/garage/tirecalc.html