That's the perfect size for my daughters power wheels.. Right on.
I got it at harbor freight and tools. my advice is go to the store, the online price was 339 but in the store 229. assembly wasn't that bad but the directions were not that good. also installation requires repacking the bearings, so if you have never done it before, it might pose a problem, however, it isn't that hard so it might be a good time to learn.
And yes, as soon as I can find some bigger tires, I will put them on, I agree it looks ridiculous.