Lightweight wheels?

[Myx]

Anyone else purchased any 15" lightweight wheels for the Sonic?

 

[Opticon]

I have a set of K1s I could throw on it. But to keep factory overall diameter means I would have to run fat rubbery balloons for tires. Completely negating any advantage outside of MPG.

Some lightweight 16s or 17s would be a better choice for the driver type.