I searched, but couldn't come up with an answer from past posts, even though it must be in there somwhere! Will oem Gen II 15" wheels (happen to be from a 2006) fit the Gen III Prius so that I can use the Gen II wheels to carry the snow tires for a Gen III ? Are there any issues, such as different offset, which might cause problems? Thanks.
If they are 5x100's which they should be, yes. The offset is the only concern. I have read on here that someone did fit them on a G3.
They are interchangeable. http://priuschat.com/forums/gen-ii-...-2010-rims-will-they-fit-08-a.html#post812223 Ken@Japan
You can also use the alloys from any of the previous-gen Corollas - [2003-2008], if they're easier to find locally or simply less expensive. They all share the same specs - 15", 100mm bolt pattern, 6" width, 45mm offset.