Pitfalls in replacing OEM tires?

[RMcG]

Thanks Vang. The speedometer calculator at the link you sent indicates that the speedometer will show a speed of 2.2% less than with the original OEM size. So at 71.5 mph, the speedometer will be reading 70 mph, no big deal. For a trip of 817.6 miles, the odometer will read 800 miles, again, no big deal.

Can hitting a curb with your front tire knock the front wheel out of alignment on a Yaris?

Does anybody have any experience with either the Hankook Optimo H727 (185/65 R14) or the Hankook Mileage Plus II H725 (175/65 R14)?

Thanks,

RMcG