No, its not, 215-45-15 is the same as 195-55-15, but when you change to a 16" rim, you need to compensate for it, the correct rolling diameter to keep it as close to stock as possible would be 215-40-15, but you really dont want to go that wide, your tires will be hanging off the edges, you'll get a little more sidewall flex than you want...I wouldn't go any more than a 205-50-15 or a 205-45-16, it'll also insure that you dont rub if you're lowered.

Later,
Aj