Will these fit a 14"x5.5" wheel

They'll fit, but, no, you can't go wider. A 5.5" wide rim is the minimum width recommended for a 215/70/14. A 225/70/14 has a minimum recommended rim width of 6". Can you fit one on a 5.5"? Sure. But you'll have to find someone that wants to ignore the manufacturer's specs to mount it, and you could end up with abnormal tire wear. I'm sure it's been done, but that doesn't make it right.