eBay Moto-X Industries 21" WRX Conversion?

Has anyone tried this conversion for the WRX to a 21" front wheel: eBay ad. It looks like a fairly cost-effective way to multi-purpose the bike ($346).

I did the opposite of what you’re doing. I just got a set of 17’s from moto-x for my R and couldn’t be happier. I got front and back warp9’s with rotors and sprocket for about $800 shipped.
Go to their website and build your rim to see if there’s a difference in price from ebay. I’m not sure about the R rims but when I build the x rims on their site there is a $20.00 discount off the bat for the WR250X . You also have the option to mix and match what parts you need that could save you more money.
I wouldn’t hesitate to buy from them again.

Thanks. That's great info and I'll check out their site.